http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/QueryExpressions.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/QueryExpressions.java b/core/api/src/main/java/org/apache/zest/api/query/QueryExpressions.java new file mode 100644 index 0000000..a109310 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/QueryExpressions.java @@ -0,0 +1,944 @@ +/* + * Copyright 2007-2011 Rickard Ãberg. + * Copyright 2007-2010 Niclas Hedhman. + * Copyright 2008 Alin Dreghiciu. + * Copyright 2012 Stanislav Muhametsin. + * Copyright 2012-2014 Paul Merlin. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * ied. + * + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.zest.api.query; + +import java.lang.reflect.Field; +import java.lang.reflect.InvocationHandler; +import java.lang.reflect.Method; +import java.lang.reflect.Proxy; +import java.lang.reflect.Type; +import java.util.Arrays; +import java.util.Collection; +import org.apache.zest.api.association.Association; +import org.apache.zest.api.association.GenericAssociationInfo; +import org.apache.zest.api.association.ManyAssociation; +import org.apache.zest.api.association.NamedAssociation; +import org.apache.zest.api.composite.Composite; +import org.apache.zest.api.entity.Identity; +import org.apache.zest.api.injection.scope.State; +import org.apache.zest.api.property.GenericPropertyInfo; +import org.apache.zest.api.property.Property; +import org.apache.zest.api.query.grammar.AndSpecification; +import org.apache.zest.api.query.grammar.AssociationFunction; +import org.apache.zest.api.query.grammar.AssociationNotNullSpecification; +import org.apache.zest.api.query.grammar.AssociationNullSpecification; +import org.apache.zest.api.query.grammar.ContainsAllSpecification; +import org.apache.zest.api.query.grammar.ContainsSpecification; +import org.apache.zest.api.query.grammar.EqSpecification; +import org.apache.zest.api.query.grammar.GeSpecification; +import org.apache.zest.api.query.grammar.GtSpecification; +import org.apache.zest.api.query.grammar.LeSpecification; +import org.apache.zest.api.query.grammar.LtSpecification; +import org.apache.zest.api.query.grammar.ManyAssociationContainsSpecification; +import org.apache.zest.api.query.grammar.ManyAssociationFunction; +import org.apache.zest.api.query.grammar.MatchesSpecification; +import org.apache.zest.api.query.grammar.NamedAssociationContainsNameSpecification; +import org.apache.zest.api.query.grammar.NamedAssociationContainsSpecification; +import org.apache.zest.api.query.grammar.NamedAssociationFunction; +import org.apache.zest.api.query.grammar.NeSpecification; +import org.apache.zest.api.query.grammar.NotSpecification; +import org.apache.zest.api.query.grammar.OrSpecification; +import org.apache.zest.api.query.grammar.OrderBy; +import org.apache.zest.api.query.grammar.PropertyFunction; +import org.apache.zest.api.query.grammar.PropertyNotNullSpecification; +import org.apache.zest.api.query.grammar.PropertyNullSpecification; +import org.apache.zest.api.query.grammar.PropertyReference; +import org.apache.zest.api.query.grammar.Variable; +import org.apache.zest.api.util.NullArgumentException; +import org.apache.zest.functional.Specification; + +import static org.apache.zest.functional.Iterables.first; +import static org.apache.zest.functional.Iterables.prepend; + +/** + * Static factory methods for query expressions and operators. + */ +public final class QueryExpressions +{ + // This is used for eq(Association,Composite) + private static final Method IDENTITY_METHOD; + + static + { + try + { + IDENTITY_METHOD = Identity.class.getMethod( "identity" ); + } + catch( NoSuchMethodException e ) + { + throw new InternalError( "Zest Core API codebase is corrupted. Contact Zest team: QueryExpressions" ); + } + } + + // Templates and variables -----------------------------------------------| + + /** + * Create a Query Template using the given type. + * + * @param <T> the type of the template + * @param clazz a class declaring the type of the template + * + * @return a new Query Template + */ + public static <T> T templateFor( Class<T> clazz ) + { + NullArgumentException.validateNotNull( "Template class", clazz ); + + if( clazz.isInterface() ) + { + return clazz.cast( Proxy.newProxyInstance( clazz.getClassLoader(), + array( clazz ), + new TemplateHandler<T>( null, null, null, null ) ) ); + } + else + { + try + { + T mixin = clazz.newInstance(); + for( Field field : clazz.getFields() ) + { + if( field.getAnnotation( State.class ) != null ) + { + if( field.getType().equals( Property.class ) ) + { + field.set( mixin, + Proxy.newProxyInstance( field.getType().getClassLoader(), + array( field.getType() ), + new PropertyReferenceHandler<>( new PropertyFunction<T>( null, null, null, null, field ) ) ) ); + } + else if( field.getType().equals( Association.class ) ) + { + field.set( mixin, + Proxy.newProxyInstance( field.getType().getClassLoader(), + array( field.getType() ), + new AssociationReferenceHandler<>( new AssociationFunction<T>( null, null, null, field ) ) ) ); + } + else if( field.getType().equals( ManyAssociation.class ) ) + { + field.set( mixin, + Proxy.newProxyInstance( field.getType().getClassLoader(), + array( field.getType() ), + new ManyAssociationReferenceHandler<>( new ManyAssociationFunction<T>( null, null, null, field ) ) ) ); + } + else if( field.getType().equals( NamedAssociation.class ) ) + { + field.set( mixin, + Proxy.newProxyInstance( field.getType().getClassLoader(), + array( field.getType() ), + new NamedAssociationReferenceHandler<>( new NamedAssociationFunction<T>( null, null, null, field ) ) ) ); + } + } + } + return mixin; + } + catch( IllegalAccessException | IllegalArgumentException | InstantiationException | SecurityException e ) + { + throw new IllegalArgumentException( "Cannot use class as template", e ); + } + } + } + + /** + * Create a Query Template using the given mixin class and association. + * + * @param <T> the type of the template + * @param mixinType a class declaring the type of the template + * @param association an association + * + * @return a new Query Template + */ + public static <T> T templateFor( final Class<T> mixinType, Association<?> association ) + { + NullArgumentException.validateNotNull( "Mixin class", mixinType ); + NullArgumentException.validateNotNull( "Association", association ); + return mixinType.cast( Proxy.newProxyInstance( mixinType.getClassLoader(), + array( mixinType ), + new TemplateHandler<T>( null, + association( association ), + null, + null ) ) ); + } + + public static <T> T oneOf( final ManyAssociation<T> association ) + { + NullArgumentException.validateNotNull( "Association", association ); + return association.get( 0 ); + } + + public static <T> T oneOf( final NamedAssociation<T> association ) + { + NullArgumentException.validateNotNull( "Association", association ); + return association.get( first( association ) ); + } + + /** + * Create a new Query Variable. + * + * @param name a name for the Variable + * + * @return a new Query Variable. + */ + public static Variable variable( String name ) + { + NullArgumentException.validateNotNull( "Variable name", name ); + return new Variable( name ); + } + + /** + * Create a new Query Template PropertyFunction. + * + * @param <T> type of the Property + * @param property a Property + * + * @return a new Query Template PropertyFunction + */ + @SuppressWarnings( "unchecked" ) + public static <T> PropertyFunction<T> property( Property<T> property ) + { + return ( (PropertyReferenceHandler<T>) Proxy.getInvocationHandler( property ) ).property(); + } + + /** + * Create a new Query Property instance. + * + * @param <T> type of the Property + * @param mixinClass mixin of the Property + * @param fieldName name of the Property field + * + * @return a new Query Property instance for the given mixin and property name. + */ + @SuppressWarnings( "unchecked" ) + public static <T> Property<T> property( Class<?> mixinClass, String fieldName ) + { + try + { + Field field = mixinClass.getField( fieldName ); + if( !Property.class.isAssignableFrom( field.getType() ) ) + { + throw new IllegalArgumentException( "Field must be of type Property<?>" ); + } + return (Property<T>) Proxy.newProxyInstance( + mixinClass.getClassLoader(), + array( field.getType() ), + new PropertyReferenceHandler<>( new PropertyFunction<T>( null, null, null, null, field ) ) ); + } + catch( NoSuchFieldException e ) + { + throw new IllegalArgumentException( "No such field '" + fieldName + "' in mixin " + mixinClass.getName() ); + } + } + + /** + * Create a new Query Template AssociationFunction. + * + * @param <T> type of the Association + * @param association an Association + * + * @return a new Query Template AssociationFunction + */ + @SuppressWarnings( "unchecked" ) + public static <T> AssociationFunction<T> association( Association<T> association ) + { + return ( (AssociationReferenceHandler<T>) Proxy.getInvocationHandler( association ) ).association(); + } + + /** + * Create a new Query Template ManyAssociationFunction. + * + * @param <T> type of the ManyAssociation + * @param association a ManyAssociation + * + * @return a new Query Template ManyAssociationFunction + */ + @SuppressWarnings( "unchecked" ) + public static <T> ManyAssociationFunction<T> manyAssociation( ManyAssociation<T> association ) + { + return ( (ManyAssociationReferenceHandler<T>) Proxy.getInvocationHandler( association ) ).manyAssociation(); + } + + /** + * Create a new Query Template NamedAssociationFunction. + * + * @param <T> type of the NamedAssociation + * @param association a NamedAssociation + * + * @return a new Query Template NamedAssociationFunction + */ + @SuppressWarnings( "unchecked" ) + public static <T> NamedAssociationFunction<T> namedAssociation( NamedAssociation<T> association ) + { + return ( (NamedAssociationReferenceHandler<T>) Proxy.getInvocationHandler( association ) ).namedAssociation(); + } + + // And/Or/Not ------------------------------------------------------------| + /** + * Create a new AND specification. + * + * @param left first operand + * @param right second operand + * @param optionalRight optional operands + * + * @return a new AND specification + */ + @SafeVarargs + public static AndSpecification and( Specification<Composite> left, + Specification<Composite> right, + Specification<Composite>... optionalRight + ) + { + return new AndSpecification( prepend( left, prepend( right, Arrays.asList( optionalRight ) ) ) ); + } + + /** + * Create a new OR specification. + * + * @param specs operands + * + * @return a new OR specification + */ + @SafeVarargs + public static OrSpecification or( Specification<Composite>... specs ) + { + return new OrSpecification( Arrays.asList( specs ) ); + } + + /** + * Create a new NOT specification. + * + * @param operand specification to be negated + * + * @return a new NOT specification + */ + public static NotSpecification not( Specification<Composite> operand ) + { + return new NotSpecification( operand ); + } + + // Comparisons -----------------------------------------------------------| + + /** + * Create a new EQUALS specification for a Property. + * + * @param property a Property + * @param value its value + * + * @return a new EQUALS specification for a Property. + */ + public static <T> EqSpecification<T> eq( Property<T> property, T value ) + { + return new EqSpecification<>( property( property ), value ); + } + + /** + * Create a new EQUALS specification for a Property using a named Variable. + * + * @param property a Property + * @param variable a Query Variable + * + * @return a new EQUALS specification for a Property using a named Variable. + */ + @SuppressWarnings( {"raw", "unchecked"} ) + public static <T> EqSpecification<T> eq( Property<T> property, Variable variable ) + { + return new EqSpecification( property( property ), variable ); + } + + /** + * Create a new EQUALS specification for an Association. + * + * @param association an Association + * @param value its value + * + * @return a new EQUALS specification for an Association. + */ + public static <T> EqSpecification<String> eq( Association<T> association, T value ) + { + return new EqSpecification<>( new PropertyFunction<String>( null, + association( association ), + null, + null, + IDENTITY_METHOD ), + value.toString() ); + } + + /** + * Create a new GREATER OR EQUALS specification for a Property. + * + * @param property a Property + * @param value its value + * + * @return a new GREATER OR EQUALS specification for a Property. + */ + public static <T> GeSpecification<T> ge( Property<T> property, T value ) + { + return new GeSpecification<>( property( property ), value ); + } + + /** + * Create a new GREATER OR EQUALS specification for a Property using a named Variable. + * + * @param property a Property + * @param variable a Query Variable + * + * @return a new GREATER OR EQUALS specification for a Property using a named Variable. + */ + @SuppressWarnings( {"raw", "unchecked"} ) + public static <T> GeSpecification<T> ge( Property<T> property, Variable variable ) + { + return new GeSpecification( property( property ), variable ); + } + + /** + * Create a new GREATER THAN specification for a Property. + * + * @param property a Property + * @param value its value + * + * @return a new GREATER THAN specification for a Property. + */ + public static <T> GtSpecification<T> gt( Property<T> property, T value ) + { + return new GtSpecification<>( property( property ), value ); + } + + /** + * Create a new GREATER THAN specification for a Property using a named Variable. + * + * @param property a Property + * @param variable a Query Variable + * + * @return a new GREATER THAN specification for a Property using a named Variable. + */ + @SuppressWarnings( {"raw", "unchecked"} ) + public static <T> GtSpecification<T> gt( Property<T> property, Variable variable ) + { + return new GtSpecification( property( property ), variable ); + } + + /** + * Create a new LESS OR EQUALS specification for a Property. + * + * @param property a Property + * @param value its value + * + * @return a new LESS OR EQUALS specification for a Property. + */ + public static <T> LeSpecification<T> le( Property<T> property, T value ) + { + return new LeSpecification<>( property( property ), value ); + } + + /** + * Create a new LESS OR EQUALS specification for a Property using a named Variable. + * + * @param property a Property + * @param variable a Query Variable + * + * @return a new LESS OR EQUALS specification for a Property using a named Variable. + */ + @SuppressWarnings( {"raw", "unchecked"} ) + public static <T> LeSpecification<T> le( Property<T> property, Variable variable ) + { + return new LeSpecification( property( property ), variable ); + } + + /** + * Create a new LESSER THAN specification for a Property. + * + * @param property a Property + * @param value its value + * + * @return a new LESSER THAN specification for a Property. + */ + public static <T> LtSpecification<T> lt( Property<T> property, T value ) + { + return new LtSpecification<>( property( property ), value ); + } + + /** + * Create a new LESSER THAN specification for a Property using a named Variable. + * + * @param property a Property + * @param variable a Query Variable + * + * @return a new LESSER THAN specification for a Property using a named Variable. + */ + @SuppressWarnings( {"raw", "unchecked"} ) + public static <T> LtSpecification<T> lt( Property<T> property, Variable variable ) + { + return new LtSpecification( property( property ), variable ); + } + + /** + * Create a new NOT EQUALS specification for a Property. + * + * @param property a Property + * @param value its value + * + * @return a new NOT EQUALS specification for a Property. + */ + public static <T> NeSpecification<T> ne( Property<T> property, T value ) + { + return new NeSpecification<>( property( property ), value ); + } + + /** + * Create a new NOT EQUALS specification for a Property using a named Variable. + * + * @param property a Property + * @param variable a Query Variable + * + * @return a new NOT EQUALS specification for a Property using a named Variable. + */ + @SuppressWarnings( {"raw", "unchecked"} ) + public static <T> NeSpecification<T> ne( Property<T> property, Variable variable ) + { + return new NeSpecification( property( property ), variable ); + } + + /** + * Create a new REGULAR EXPRESSION specification for a Property. + * + * @param property a Property + * @param regexp its value + * + * @return a new REGULAR EXPRESSION specification for a Property. + */ + public static MatchesSpecification matches( Property<String> property, String regexp ) + { + return new MatchesSpecification( property( property ), regexp ); + } + + /** + * Create a new REGULAR EXPRESSION specification for a Property using a named Variable. + * + * @param property a Property + * @param variable a Query Variable + * + * @return a new REGULAR EXPRESSION specification for a Property using a named Variable. + */ + public static MatchesSpecification matches( Property<String> property, Variable variable ) + { + return new MatchesSpecification( property( property ), variable ); + } + + // Null checks -----------------------------------------------------------| + + /** + * Create a new NOT NULL specification for a Property. + * + * @param property a Property + * + * @return a new NOT NULL specification for a Property. + */ + public static <T> PropertyNotNullSpecification<T> isNotNull( Property<T> property ) + { + return new PropertyNotNullSpecification<>( property( property ) ); + } + + /** + * Create a new NULL specification for a Property. + * + * @param property a Property + * + * @return a new NULL specification for a Property. + */ + public static <T> PropertyNullSpecification<T> isNull( Property<T> property ) + { + return new PropertyNullSpecification<>( property( property ) ); + } + + /** + * Create a new NOT NULL specification for an Association. + * + * @param association an Association + * + * @return a new NOT NULL specification for an Association. + */ + public static <T> AssociationNotNullSpecification<T> isNotNull( Association<T> association ) + { + return new AssociationNotNullSpecification<>( association( association ) ); + } + + /** + * Create a new NULL specification for an Association. + * + * @param association an Association + * + * @return a new NULL specification for an Association. + */ + public static <T> AssociationNullSpecification<T> isNull( Association<T> association ) + { + return new AssociationNullSpecification<>( association( association ) ); + } + + // Collections -----------------------------------------------------------| + + /** + * Create a new CONTAINS ALL specification for a Collection Property. + * + * @param collectionProperty a Collection Property + * @param values its values + * + * @return a new CONTAINS ALL specification for a Collection Property. + */ + public static <T> ContainsAllSpecification<T> containsAll( Property<? extends Collection<T>> collectionProperty, + Iterable<T> values ) + { + NullArgumentException.validateNotNull( "Values", values ); + return new ContainsAllSpecification<>( property( collectionProperty ), values ); + } + + /** + * Create a new CONTAINS ALL specification for a Collection Property using named Variables. + * + * @param collectionProperty a Collection Property + * @param variables named Variables + * + * @return a new CONTAINS ALL specification for a Collection Property using named Variables. + */ + @SuppressWarnings( {"raw", "unchecked"} ) + public static <T> ContainsAllSpecification<T> containsAllVariables( + Property<? extends Collection<T>> collectionProperty, + Iterable<Variable> variables ) + { + NullArgumentException.validateNotNull( "Variables", variables ); + return new ContainsAllSpecification( property( collectionProperty ), variables ); + } + + /** + * Create a new CONTAINS specification for a Collection Property. + * + * @param collectionProperty a Collection Property + * @param value the value + * + * @return a new CONTAINS specification for a Collection Property. + */ + public static <T> ContainsSpecification<T> contains( Property<? extends Collection<T>> collectionProperty, + T value ) + { + NullArgumentException.validateNotNull( "Value", value ); + return new ContainsSpecification<>( property( collectionProperty ), value ); + } + + /** + * Create a new CONTAINS specification for a Collection Property using named Variables. + * + * @param collectionProperty a Collection Property + * @param variable named Variable + * + * @return a new CONTAINS specification for a Collection Property using named Variables. + */ + @SuppressWarnings( {"raw", "unchecked"} ) + public static <T> ContainsSpecification<T> contains( Property<? extends Collection<T>> collectionProperty, + Variable variable ) + { + NullArgumentException.validateNotNull( "Variable", variable ); + return new ContainsSpecification( property( collectionProperty ), variable ); + } + + /** + * Create a new CONTAINS specification for a ManyAssociation. + * + * @param manyAssoc a ManyAssociation + * @param value the value + * + * @return a new CONTAINS specification for a ManyAssociation. + */ + public static <T> ManyAssociationContainsSpecification<T> contains( ManyAssociation<T> manyAssoc, T value ) + { + return new ManyAssociationContainsSpecification<>( manyAssociation( manyAssoc ), value ); + } + + /** + * Create a new CONTAINS specification for a NamedAssociation. + * + * @param namedAssoc a NamedAssociation + * @param value the value + * + * @return a new CONTAINS specification for a NamedAssociation. + */ + public static <T> NamedAssociationContainsSpecification<T> contains( NamedAssociation<T> namedAssoc, T value ) + { + return new NamedAssociationContainsSpecification<>( namedAssociation( namedAssoc ), value ); + } + + /** + * Create a new CONTAINS NAME specification for a NamedAssociation. + * + * @param namedAssoc a NamedAssociation + * @param name the name + * + * @return a new CONTAINS NAME specification for a NamedAssociation. + */ + public static <T> NamedAssociationContainsNameSpecification<T> containsName( NamedAssociation<T> namedAssoc, + String name ) + { + return new NamedAssociationContainsNameSpecification<>( namedAssociation( namedAssoc ), name ); + } + + // Ordering --------------------------------------------------------------| + /** + * Create a new Query ascending order segment for a Property. + * + * @param <T> type of the Property + * @param property a Property + * + * @return a new Query ascending order segment for a Property. + */ + public static <T> OrderBy orderBy( final Property<T> property ) + { + return orderBy( property, OrderBy.Order.ASCENDING ); + } + + /** + * Create a new Query ordering segment for a Property. + * + * @param <T> type of the Property + * @param property a Property + * @param order ascending or descending + * + * @return a new Query ordering segment for a Property. + */ + public static <T> OrderBy orderBy( final Property<T> property, final OrderBy.Order order ) + { + return new OrderBy( property( property ), order ); + } + + // Query Templates InvocationHandlers ------------------------------------| + + private static class TemplateHandler<T> + implements InvocationHandler + { + private final PropertyFunction<?> compositeProperty; + private final AssociationFunction<?> compositeAssociation; + private final ManyAssociationFunction<?> compositeManyAssociation; + private final NamedAssociationFunction<?> compositeNamedAssociation; + + private TemplateHandler( PropertyFunction<?> compositeProperty, + AssociationFunction<?> compositeAssociation, + ManyAssociationFunction<?> compositeManyAssociation, + NamedAssociationFunction<?> compositeNamedAssociation + ) + { + this.compositeProperty = compositeProperty; + this.compositeAssociation = compositeAssociation; + this.compositeManyAssociation = compositeManyAssociation; + this.compositeNamedAssociation = compositeNamedAssociation; + } + + @Override + public Object invoke( Object o, Method method, Object[] objects ) + throws Throwable + { + if( Property.class.isAssignableFrom( method.getReturnType() ) ) + { + return Proxy.newProxyInstance( + method.getReturnType().getClassLoader(), + array( method.getReturnType() ), + new PropertyReferenceHandler<>( new PropertyFunction<T>( compositeProperty, + compositeAssociation, + compositeManyAssociation, + compositeNamedAssociation, + method ) ) ); + } + else if( Association.class.isAssignableFrom( method.getReturnType() ) ) + { + return Proxy.newProxyInstance( + method.getReturnType().getClassLoader(), + array( method.getReturnType() ), + new AssociationReferenceHandler<>( new AssociationFunction<T>( compositeAssociation, + compositeManyAssociation, + compositeNamedAssociation, + method ) ) ); + } + else if( ManyAssociation.class.isAssignableFrom( method.getReturnType() ) ) + { + return Proxy.newProxyInstance( + method.getReturnType().getClassLoader(), + array( method.getReturnType() ), + new ManyAssociationReferenceHandler<>( new ManyAssociationFunction<T>( compositeAssociation, + compositeManyAssociation, + compositeNamedAssociation, + method ) ) ); + } + else if( NamedAssociation.class.isAssignableFrom( method.getReturnType() ) ) + { + return Proxy.newProxyInstance( + method.getReturnType().getClassLoader(), + array( method.getReturnType() ), + new NamedAssociationReferenceHandler<>( new NamedAssociationFunction<T>( compositeAssociation, + compositeManyAssociation, + compositeNamedAssociation, + method ) ) ); + } + + return null; + } + } + + private static class PropertyReferenceHandler<T> + implements InvocationHandler + { + private final PropertyFunction<T> property; + + private PropertyReferenceHandler( PropertyFunction<T> property ) + { + this.property = property; + } + + private PropertyFunction<T> property() + { + return property; + } + + @Override + public Object invoke( Object o, final Method method, Object[] objects ) + throws Throwable + { + if( method.equals( Property.class.getMethod( "get" ) ) ) + { + Type propertyType = GenericPropertyInfo.propertyTypeOf( property.accessor() ); + if( propertyType.getClass().equals( Class.class ) ) + { + return Proxy.newProxyInstance( method.getDeclaringClass().getClassLoader(), + array( (Class<?>) propertyType, PropertyReference.class ), + new TemplateHandler<T>( property, null, null, null ) ); + } + } + + return null; + } + } + + private static class AssociationReferenceHandler<T> + implements InvocationHandler + { + private final AssociationFunction<T> association; + + private AssociationReferenceHandler( AssociationFunction<T> association ) + { + this.association = association; + } + + private AssociationFunction<T> association() + { + return association; + } + + @Override + public Object invoke( Object o, final Method method, Object[] objects ) + throws Throwable + { + if( method.equals( Association.class.getMethod( "get" ) ) ) + { + Type associationType = GenericAssociationInfo.associationTypeOf( association.accessor() ); + if( associationType.getClass().equals( Class.class ) ) + { + return Proxy.newProxyInstance( method.getDeclaringClass().getClassLoader(), + array( (Class) associationType, PropertyReference.class ), + new TemplateHandler<T>( null, association, null, null ) ); + } + } + + return null; + } + } + + private static class ManyAssociationReferenceHandler<T> + implements InvocationHandler + { + private final ManyAssociationFunction<T> manyAssociation; + + private ManyAssociationReferenceHandler( ManyAssociationFunction<T> manyAssociation ) + { + this.manyAssociation = manyAssociation; + } + + public ManyAssociationFunction<T> manyAssociation() + { + return manyAssociation; + } + + @Override + public Object invoke( Object o, final Method method, Object[] objects ) + throws Throwable + { + if( method.equals( ManyAssociation.class.getMethod( "get", Integer.TYPE ) ) ) + { + Type manyAssociationType = GenericAssociationInfo.associationTypeOf( manyAssociation.accessor() ); + if( manyAssociationType.getClass().equals( Class.class ) ) + { + return Proxy.newProxyInstance( method.getDeclaringClass().getClassLoader(), + array( (Class) manyAssociationType, PropertyReference.class ), + new TemplateHandler<T>( null, null, manyAssociation, null ) ); + } + } + + return null; + } + } + + private static class NamedAssociationReferenceHandler<T> + implements InvocationHandler + { + private final NamedAssociationFunction<T> namedAssociation; + + private NamedAssociationReferenceHandler( NamedAssociationFunction<T> namedAssociation ) + { + this.namedAssociation = namedAssociation; + } + + public NamedAssociationFunction<T> namedAssociation() + { + return namedAssociation; + } + + @Override + public Object invoke( Object o, final Method method, Object[] objects ) + throws Throwable + { + if( method.equals( NamedAssociation.class.getMethod( "get", String.class ) ) ) + { + Type namedAssociationType = GenericAssociationInfo.associationTypeOf( namedAssociation.accessor() ); + if( namedAssociationType.getClass().equals( Class.class ) ) + { + return Proxy.newProxyInstance( method.getDeclaringClass().getClassLoader(), + array( (Class) namedAssociationType, PropertyReference.class ), + new TemplateHandler<T>( null, null, null, namedAssociation ) ); + } + } + + return null; + } + } + + @SafeVarargs + private static <T> T[] array( T... array ) + { + return array; + } + + private QueryExpressions() + { + } +}
http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/AndSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/AndSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/AndSpecification.java new file mode 100644 index 0000000..3d710ad --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/AndSpecification.java @@ -0,0 +1,56 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.composite.Composite; +import org.apache.zest.functional.Specification; +import org.apache.zest.functional.Specifications; + +/** + * AND Specification. + */ +public class AndSpecification + extends BinarySpecification +{ + + public AndSpecification( Iterable<Specification<Composite>> operands ) + { + super( operands ); + } + + @Override + public boolean satisfiedBy( Composite item ) + { + return Specifications.and( operands ).satisfiedBy( item ); + } + + @Override + public String toString() + { + StringBuilder sb = new StringBuilder( "(" ); + String and = ""; + for( Specification<Composite> operand : operands ) + { + sb.append( and ).append( operand ); + and = " and "; + } + return sb.append( ")" ).toString(); + } + +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationFunction.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationFunction.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationFunction.java new file mode 100644 index 0000000..8355114 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationFunction.java @@ -0,0 +1,148 @@ +/* + * Copyright 2007-2011 Rickard Ãberg. + * Copyright 2007-2010 Niclas Hedhman. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * ied. + * + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.zest.api.query.grammar; + +import java.lang.reflect.AccessibleObject; +import java.lang.reflect.Member; +import java.lang.reflect.Proxy; +import java.lang.reflect.Type; +import org.apache.zest.api.association.Association; +import org.apache.zest.api.association.AssociationStateHolder; +import org.apache.zest.api.association.GenericAssociationInfo; +import org.apache.zest.api.association.ManyAssociation; +import org.apache.zest.api.association.NamedAssociation; +import org.apache.zest.api.composite.Composite; +import org.apache.zest.api.composite.CompositeInstance; +import org.apache.zest.api.query.QueryExpressionException; +import org.apache.zest.api.util.Classes; +import org.apache.zest.functional.Function; + +import static org.apache.zest.api.util.Classes.typeOf; + +/** + * Function to get Entity Associations + */ +public class AssociationFunction<T> + implements Function<Composite, Association<T>> +{ + private final AssociationFunction<?> traversedAssociation; + private final ManyAssociationFunction<?> traversedManyAssociation; + private final NamedAssociationFunction<?> traversedNamedAssociation; + private final AccessibleObject accessor; + + public AssociationFunction( AssociationFunction<?> traversedAssociation, + ManyAssociationFunction<?> traversedManyAssociation, + NamedAssociationFunction<?> traversedNamedAssociation, + AccessibleObject accessor + ) + { + this.traversedAssociation = traversedAssociation; + this.traversedManyAssociation = traversedManyAssociation; + this.traversedNamedAssociation = traversedNamedAssociation; + this.accessor = accessor; + + Type returnType = typeOf( accessor ); + if( !Association.class.isAssignableFrom( Classes.RAW_CLASS.map( returnType ) ) + && !ManyAssociation.class.isAssignableFrom( Classes.RAW_CLASS.map( returnType ) ) + && !NamedAssociation.class.isAssignableFrom( Classes.RAW_CLASS.map( returnType ) ) ) + { + throw new QueryExpressionException( "Unsupported association type:" + returnType ); + } + Type associationTypeAsType = GenericAssociationInfo.toAssociationType( returnType ); + if( !( associationTypeAsType instanceof Class ) ) + { + throw new QueryExpressionException( "Unsupported association type:" + associationTypeAsType ); + } + } + + public AssociationFunction<?> traversedAssociation() + { + return traversedAssociation; + } + + public ManyAssociationFunction<?> traversedManyAssociation() + { + return traversedManyAssociation; + } + + public NamedAssociationFunction<?> traversedNamedAssociation() + { + return traversedNamedAssociation; + } + + public AccessibleObject accessor() + { + return accessor; + } + + @Override + public Association<T> map( Composite entity ) + { + try + { + Object target = entity; + if( traversedAssociation != null ) + { + Association<?> association = traversedAssociation.map( entity ); + if( association == null ) + { + return null; + } + target = association.get(); + } + else if( traversedManyAssociation != null ) + { + throw new IllegalArgumentException( "Cannot evaluate a ManyAssociation" ); + } + else if( traversedNamedAssociation != null ) + { + throw new IllegalArgumentException( "Cannot evaluate a NamedAssociation" ); + } + + if( target == null ) + { + return null; + } + + CompositeInstance handler = (CompositeInstance) Proxy.getInvocationHandler( target ); + return ( (AssociationStateHolder) handler.state() ).associationFor( accessor ); + } + catch( IllegalArgumentException e ) + { + throw e; + } + catch( Throwable e ) + { + throw new IllegalArgumentException( e ); + } + } + + @Override + public String toString() + { + if( traversedAssociation != null ) + { + return traversedAssociation.toString() + "." + ( (Member) accessor ).getName(); + } + else + { + return ( (Member) accessor ).getName(); + } + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationNotNullSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationNotNullSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationNotNullSpecification.java new file mode 100644 index 0000000..1376029 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationNotNullSpecification.java @@ -0,0 +1,67 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.association.Association; +import org.apache.zest.api.composite.Composite; + +/** + * Association not null Specification. + */ +public class AssociationNotNullSpecification<T> + extends ExpressionSpecification +{ + private AssociationFunction<T> association; + + public AssociationNotNullSpecification( AssociationFunction<T> association ) + { + this.association = association; + } + + public AssociationFunction<T> association() + { + return association; + } + + @Override + public boolean satisfiedBy( Composite item ) + { + try + { + Association<T> assoc = association.map( item ); + + if( assoc == null ) + { + return false; + } + + return assoc.get() != null; + } + catch( IllegalArgumentException e ) + { + return false; + } + } + + @Override + public String toString() + { + return association.toString() + "is not null"; + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationNullSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationNullSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationNullSpecification.java new file mode 100644 index 0000000..7dd72b2 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/AssociationNullSpecification.java @@ -0,0 +1,67 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.association.Association; +import org.apache.zest.api.composite.Composite; + +/** + * Association null Specification. + */ +public class AssociationNullSpecification<T> + extends ExpressionSpecification +{ + private AssociationFunction<T> association; + + public AssociationNullSpecification( AssociationFunction<T> association ) + { + this.association = association; + } + + public AssociationFunction<T> association() + { + return association; + } + + @Override + public boolean satisfiedBy( Composite item ) + { + try + { + Association<T> assoc = association.map( item ); + + if( assoc == null ) + { + return true; + } + + return assoc.get() == null; + } + catch( IllegalArgumentException e ) + { + return true; + } + } + + @Override + public String toString() + { + return association.toString() + "is null"; + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/BinarySpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/BinarySpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/BinarySpecification.java new file mode 100644 index 0000000..177caf0 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/BinarySpecification.java @@ -0,0 +1,41 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.composite.Composite; +import org.apache.zest.functional.Specification; + +/** + * Base binary Specification, used for AND and OR Specifications.. + */ +public abstract class BinarySpecification + extends ExpressionSpecification +{ + protected final Iterable<Specification<Composite>> operands; + + protected BinarySpecification( Iterable<Specification<Composite>> operands ) + { + this.operands = operands; + } + + public Iterable<Specification<Composite>> operands() + { + return operands; + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/ComparisonSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/ComparisonSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/ComparisonSpecification.java new file mode 100644 index 0000000..c53fe00 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/ComparisonSpecification.java @@ -0,0 +1,76 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.composite.Composite; +import org.apache.zest.api.property.Property; + +/** + * Base comparison Specification. + */ +public abstract class ComparisonSpecification<T> + extends ExpressionSpecification +{ + protected final PropertyFunction<T> property; + protected final T value; + + public ComparisonSpecification( PropertyFunction<T> property, T value ) + { + this.property = property; + this.value = value; + } + + public PropertyFunction<T> property() + { + return property; + } + + @Override + public final boolean satisfiedBy( Composite item ) + { + try + { + Property<T> prop = property.map( item ); + + if( prop == null ) + { + return false; + } + + T propValue = prop.get(); + if( propValue == null ) + { + return false; + } + + return compare( propValue ); + } + catch( IllegalArgumentException e ) + { + return false; + } + } + + protected abstract boolean compare( T value ); + + public T value() + { + return value; + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/ContainsAllSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/ContainsAllSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/ContainsAllSpecification.java new file mode 100644 index 0000000..c5221d2 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/ContainsAllSpecification.java @@ -0,0 +1,78 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import java.util.Collection; +import org.apache.zest.api.composite.Composite; +import org.apache.zest.functional.Iterables; + +/** + * Contains All Specification. + */ +public class ContainsAllSpecification<T> + extends ExpressionSpecification +{ + private PropertyFunction<? extends Collection<T>> collectionProperty; + private Iterable<T> valueCollection; + + public ContainsAllSpecification( PropertyFunction<? extends Collection<T>> collectionProperty, + Iterable<T> valueCollection + ) + { + this.collectionProperty = collectionProperty; + this.valueCollection = valueCollection; + } + + public PropertyFunction<? extends Collection<T>> collectionProperty() + { + return collectionProperty; + } + + public Iterable<T> containedValues() + { + return valueCollection; + } + + @Override + public boolean satisfiedBy( Composite item ) + { + Collection<T> collection = collectionProperty.map( item ).get(); + + if( collection == null ) + { + return false; + } + + for( T value : valueCollection ) + { + if( !collection.contains( value ) ) + { + return false; + } + } + + return true; + } + + @Override + public String toString() + { + return collectionProperty + " contains " + Iterables.toList( valueCollection ); + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/ContainsSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/ContainsSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/ContainsSpecification.java new file mode 100644 index 0000000..4f05aac --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/ContainsSpecification.java @@ -0,0 +1,67 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import java.util.Collection; +import org.apache.zest.api.composite.Composite; + +/** + * Contains Specification. + */ +public class ContainsSpecification<T> + extends ExpressionSpecification +{ + private PropertyFunction<? extends Collection<T>> collectionProperty; + private T value; + + public ContainsSpecification( PropertyFunction<? extends Collection<T>> collectionProperty, T value ) + { + this.collectionProperty = collectionProperty; + this.value = value; + } + + public PropertyFunction<? extends Collection<T>> collectionProperty() + { + return collectionProperty; + } + + public T value() + { + return value; + } + + @Override + public boolean satisfiedBy( Composite item ) + { + Collection<T> collection = collectionProperty.map( item ).get(); + + if( collection == null ) + { + return false; + } + + return collection.contains( value ); + } + + @Override + public String toString() + { + return collectionProperty + " contains " + value; + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/EqSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/EqSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/EqSpecification.java new file mode 100644 index 0000000..b7ed03c --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/EqSpecification.java @@ -0,0 +1,43 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +/** + * Equals Specification. + */ +public class EqSpecification<T> + extends ComparisonSpecification<T> +{ + public EqSpecification( PropertyFunction<T> property, T value ) + { + super( property, value ); + } + + @Override + protected boolean compare( T value ) + { + return value.equals( this.value ); + } + + @Override + public String toString() + { + return property.toString() + "=" + value.toString(); + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/ExpressionSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/ExpressionSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/ExpressionSpecification.java new file mode 100644 index 0000000..f0dd6b2 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/ExpressionSpecification.java @@ -0,0 +1,60 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.composite.Composite; +import org.apache.zest.functional.Specification; + +import static org.apache.zest.functional.Iterables.append; +import static org.apache.zest.functional.Iterables.iterable; + +/** + * Base expression Specification. + */ +public abstract class ExpressionSpecification + implements Specification<Composite> +{ + + @SuppressWarnings( "unchecked" ) + public AndSpecification and( Specification<Composite> specification ) + { + if( this instanceof AndSpecification ) + { + return new AndSpecification( append( specification, ( (AndSpecification) this ).operands() ) ); + } + else + { + return new AndSpecification( iterable( this, specification ) ); + } + } + + @SuppressWarnings( "unchecked" ) + public OrSpecification or( Specification<Composite> specification ) + { + if( this instanceof OrSpecification ) + { + return new OrSpecification( append( specification, ( (OrSpecification) this ).operands() ) ); + } + else + { + return new OrSpecification( iterable( this, specification ) ); + } + } + +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/GeSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/GeSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/GeSpecification.java new file mode 100644 index 0000000..f012293 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/GeSpecification.java @@ -0,0 +1,44 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +/** + * Greater or equals Specification. + */ +public class GeSpecification<T> + extends ComparisonSpecification<T> +{ + public GeSpecification( PropertyFunction<T> property, T value ) + { + super( property, value ); + } + + @Override + @SuppressWarnings( "unchecked" ) + protected boolean compare( T value ) + { + return ( (Comparable) value ).compareTo( this.value ) >= 0; + } + + @Override + public String toString() + { + return property.toString() + ">=" + value.toString(); + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/GtSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/GtSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/GtSpecification.java new file mode 100644 index 0000000..880fb67 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/GtSpecification.java @@ -0,0 +1,44 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +/** + * Greater than Specification. + */ +public class GtSpecification<T> + extends ComparisonSpecification<T> +{ + public GtSpecification( PropertyFunction<T> property, T value ) + { + super( property, value ); + } + + @Override + @SuppressWarnings( "unchecked" ) + protected boolean compare( T value ) + { + return ( (Comparable) value ).compareTo( this.value ) > 0; + } + + @Override + public String toString() + { + return property.toString() + ">" + value.toString(); + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/LeSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/LeSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/LeSpecification.java new file mode 100644 index 0000000..3a28f16 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/LeSpecification.java @@ -0,0 +1,44 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +/** + * Less or equals Specification. + */ +public class LeSpecification<T> + extends ComparisonSpecification<T> +{ + public LeSpecification( PropertyFunction<T> property, T value ) + { + super( property, value ); + } + + @Override + @SuppressWarnings( "unchecked" ) + protected boolean compare( T value ) + { + return ( (Comparable) value ).compareTo( this.value ) <= 0; + } + + @Override + public String toString() + { + return property.toString() + "<=" + value.toString(); + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/LtSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/LtSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/LtSpecification.java new file mode 100644 index 0000000..8f476c3 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/LtSpecification.java @@ -0,0 +1,44 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +/** + * Lesser than Specification. + */ +public class LtSpecification<T> + extends ComparisonSpecification<T> +{ + public LtSpecification( PropertyFunction<T> property, T value ) + { + super( property, value ); + } + + @Override + @SuppressWarnings( "unchecked" ) + protected boolean compare( T value ) + { + return ( (Comparable) value ).compareTo( this.value ) < 0; + } + + @Override + public String toString() + { + return property.toString() + "<" + value.toString(); + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/ManyAssociationContainsSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/ManyAssociationContainsSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/ManyAssociationContainsSpecification.java new file mode 100644 index 0000000..a15bdb0 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/ManyAssociationContainsSpecification.java @@ -0,0 +1,65 @@ +/* + * Copyright 2007-2011 Rickard Ãberg. + * Copyright 2007-2010 Niclas Hedhman. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * ied. + * + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.association.ManyAssociation; +import org.apache.zest.api.composite.Composite; + +/** + * ManyAssociation Contains Specification. + */ +public class ManyAssociationContainsSpecification<T> + extends ExpressionSpecification +{ + private final ManyAssociationFunction<T> manyAssociationFunction; + private final T value; + + public ManyAssociationContainsSpecification( ManyAssociationFunction<T> manyAssociationFunction, T value ) + { + this.manyAssociationFunction = manyAssociationFunction; + this.value = value; + } + + public ManyAssociationFunction<T> manyAssociation() + { + return manyAssociationFunction; + } + + public T value() + { + return value; + } + + @Override + public boolean satisfiedBy( Composite item ) + { + ManyAssociation<T> collection = manyAssociationFunction.map( item ); + if( collection == null ) + { + return false; + } + return collection.contains( value ); + } + + @Override + public String toString() + { + return manyAssociationFunction + " contains:" + value; + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/ManyAssociationFunction.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/ManyAssociationFunction.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/ManyAssociationFunction.java new file mode 100644 index 0000000..540a901 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/ManyAssociationFunction.java @@ -0,0 +1,117 @@ +/* + * Copyright 2007-2011 Rickard Ãberg. + * Copyright 2007-2010 Niclas Hedhman. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * ied. + * + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.zest.api.query.grammar; + +import java.lang.reflect.AccessibleObject; +import java.lang.reflect.Member; +import java.lang.reflect.Proxy; +import org.apache.zest.api.association.AssociationStateHolder; +import org.apache.zest.api.association.ManyAssociation; +import org.apache.zest.api.composite.Composite; +import org.apache.zest.api.composite.CompositeInstance; +import org.apache.zest.functional.Function; + +/** + * Function to get Entity ManyAssociations. + */ +public class ManyAssociationFunction<T> + implements Function<Composite, ManyAssociation<T>> +{ + private final AssociationFunction<?> traversedAssociation; + private final ManyAssociationFunction<?> traversedManyAssociation; + private final NamedAssociationFunction<?> traversedNamedAssociation; + private final AccessibleObject accessor; + + public ManyAssociationFunction( AssociationFunction<?> traversedAssociation, + ManyAssociationFunction<?> traversedManyAssociation, + NamedAssociationFunction<?> traversedNamedAssociation, + AccessibleObject accessor + ) + { + this.traversedAssociation = traversedAssociation; + this.traversedManyAssociation = traversedManyAssociation; + this.traversedNamedAssociation = traversedNamedAssociation; + this.accessor = accessor; + } + + public AssociationFunction<?> traversedAssociation() + { + return traversedAssociation; + } + + public ManyAssociationFunction<?> traversedManyAssociation() + { + return traversedManyAssociation; + } + + public NamedAssociationFunction<?> traversedNamedAssociation() + { + return traversedNamedAssociation; + } + + public AccessibleObject accessor() + { + return accessor; + } + + @Override + public ManyAssociation<T> map( Composite entity ) + { + try + { + Object target = entity; + if( traversedAssociation != null ) + { + target = traversedAssociation.map( entity ).get(); + } + if( traversedManyAssociation != null ) + { + throw new IllegalArgumentException( "Cannot traverse ManyAssociations" ); + } + if( traversedNamedAssociation != null ) + { + throw new IllegalArgumentException( "Cannot traverse NamedAssociations" ); + } + + CompositeInstance handler = (CompositeInstance) Proxy.getInvocationHandler( target ); + return ( (AssociationStateHolder) handler.state() ).manyAssociationFor( accessor ); + } + catch( IllegalArgumentException e ) + { + throw e; + } + catch( Throwable e ) + { + throw new IllegalArgumentException( e ); + } + } + + @Override + public String toString() + { + if( traversedAssociation != null ) + { + return traversedAssociation.toString() + "." + ( (Member) accessor ).getName(); + } + else + { + return ( (Member) accessor ).getName(); + } + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/MatchesSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/MatchesSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/MatchesSpecification.java new file mode 100644 index 0000000..4f54a47 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/MatchesSpecification.java @@ -0,0 +1,93 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.composite.Composite; +import org.apache.zest.api.property.Property; + +/** + * Regular expression match Specification. + */ +public class MatchesSpecification + extends ExpressionSpecification +{ + private PropertyFunction<String> property; + private Object value; + + public MatchesSpecification( PropertyFunction<String> property, String regexp ) + { + this.property = property; + this.value = regexp; + } + + public MatchesSpecification( PropertyFunction<String> property, Variable variable ) + { + this.property = property; + this.value = variable; + } + + public PropertyFunction<String> property() + { + return property; + } + + public Object value() + { + return value; + } + + public String regexp() + { + return ( String ) value; + } + + @Override + public boolean satisfiedBy( Composite item ) + { + Property<String> prop = property.map( item ); + + if( prop == null ) + { + return false; + } + + String val = prop.get(); + + if( val == null ) + { + return false; + } + + return val.matches( ( String ) value ); + } + + @Override + public String toString() + { + return new StringBuilder() + .append( "( " ) + .append( property ) + .append( " matches " ) + .append( "\"" ) + .append( value ) + .append( "\"" ) + .append( " )" ) + .toString(); + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/NamedAssociationContainsNameSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/NamedAssociationContainsNameSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/NamedAssociationContainsNameSpecification.java new file mode 100644 index 0000000..5af9a51 --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/NamedAssociationContainsNameSpecification.java @@ -0,0 +1,65 @@ +/* + * Copyright 2011-2012 Niclas Hedhman. + * Copyright 2014 Paul Merlin. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * ied. + * + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.association.NamedAssociation; +import org.apache.zest.api.composite.Composite; + +/** + * NamedAssociation Contains Specification. + */ +public class NamedAssociationContainsNameSpecification<T> + extends ExpressionSpecification +{ + private final NamedAssociationFunction<T> namedAssociationFunction; + private final String name; + + public NamedAssociationContainsNameSpecification( NamedAssociationFunction<T> namedAssociationFunction, String name ) + { + this.namedAssociationFunction = namedAssociationFunction; + this.name = name; + } + + public NamedAssociationFunction<T> namedAssociation() + { + return namedAssociationFunction; + } + + public String name() + { + return name; + } + + @Override + public boolean satisfiedBy( Composite item ) + { + NamedAssociation<T> collection = namedAssociationFunction.map( item ); + if( collection == null ) + { + return false; + } + return collection.containsName( name ); + } + + @Override + public String toString() + { + return namedAssociationFunction + " contains name:" + name; + } +} http://git-wip-us.apache.org/repos/asf/zest-java/blob/061ddaa0/core/api/src/main/java/org/apache/zest/api/query/grammar/NamedAssociationContainsSpecification.java ---------------------------------------------------------------------- diff --git a/core/api/src/main/java/org/apache/zest/api/query/grammar/NamedAssociationContainsSpecification.java b/core/api/src/main/java/org/apache/zest/api/query/grammar/NamedAssociationContainsSpecification.java new file mode 100644 index 0000000..e4e4f7b --- /dev/null +++ b/core/api/src/main/java/org/apache/zest/api/query/grammar/NamedAssociationContainsSpecification.java @@ -0,0 +1,65 @@ +/* + * Copyright 2011-2012 Niclas Hedhman. + * Copyright 2014 Paul Merlin. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * ied. + * + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.zest.api.query.grammar; + +import org.apache.zest.api.association.NamedAssociation; +import org.apache.zest.api.composite.Composite; + +/** + * NamedAssociation Contains Specification. + */ +public class NamedAssociationContainsSpecification<T> + extends ExpressionSpecification +{ + private final NamedAssociationFunction<T> namedAssociationFunction; + private final T value; + + public NamedAssociationContainsSpecification( NamedAssociationFunction<T> namedAssociationFunction, T value ) + { + this.namedAssociationFunction = namedAssociationFunction; + this.value = value; + } + + public NamedAssociationFunction<T> namedAssociation() + { + return namedAssociationFunction; + } + + public T value() + { + return value; + } + + @Override + public boolean satisfiedBy( Composite item ) + { + NamedAssociation<T> collection = namedAssociationFunction.map( item ); + if( collection == null ) + { + return false; + } + return collection.nameOf( value ) != null; + } + + @Override + public String toString() + { + return namedAssociationFunction + " contains:" + value; + } +}
