http://git-wip-us.apache.org/repos/asf/incubator-juneau/blob/1b4f98a0/org.apache.juneau/src/main/java/org/apache/juneau/dto/jsonschema/Schema.java
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+/***************************************************************************************************************************
+ * 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.juneau.dto.jsonschema;
+
+import java.net.URI;
+import java.util.*;
+
+import org.apache.juneau.*;
+import org.apache.juneau.annotation.*;
+import org.apache.juneau.parser.*;
+import org.apache.juneau.serializer.*;
+import org.apache.juneau.transform.*;
+import org.apache.juneau.xml.annotation.*;
+
+/**
+ * Represents a top-level schema object bean in the JSON-Schema core 
specification.
+ * <p>
+ *     Refer to {@link org.apache.juneau.dto.jsonschema} for usage information.
+ *
+ * @author James Bognar (james.bog...@salesforce.com)
+ */
+@Xml(name="schema")
+@SuppressWarnings("hiding")
+@Bean(properties={"id","$schema","$ref", 
"title","description","type","definitions","properties",
+       
"patternProperties","dependencies","items","multipleOf","maximum","exclusiveMaximum",
+       
"minimum","exclusiveMinimum","maxLength","minLength","pattern","additionalItems",
+       
"maxItems","minItems","uniqueItems","maxProperties","minProperties","required",
+       "additionalProperties","enum","allOf","anyOf","oneOf","not"})
+public class Schema {
+       private String name;                                   // Property 
name.  Not serialized.
+       private URI id;
+       private URI schemaVersion;
+       private String title;
+       private String description;
+       private JsonType typeJsonType;                         // JsonType 
representation of type
+       private JsonTypeArray typeJsonTypeArray;               // JsonTypeArray 
representation of type
+       private Map<String,Schema> definitions;
+       private Map<String,Schema> properties;
+       private Map<String,Schema> patternProperties;
+       private Map<String,Schema> dependencies;
+       private Schema itemsSchema;                            // Schema 
representation of items
+       private SchemaArray itemsSchemaArray;                  // SchemaArray 
representation of items
+       private Number multipleOf;
+       private Number maximum;
+       private Boolean exclusiveMaximum;
+       private Number minimum;
+       private Boolean exclusiveMinimum;
+       private Integer maxLength;
+       private Integer minLength;
+       private String pattern;
+       private Boolean additionalItemsBoolean;                // Boolean 
representation of additionalItems
+       private SchemaArray additionalItemsSchemaArray;        // SchemaArray 
representation of additionalItems
+       private Integer maxItems;
+       private Integer minItems;
+       private Boolean uniqueItems;
+       private Integer maxProperties;
+       private Integer minProperties;
+       private List<String> required;
+       private Boolean additionalPropertiesBoolean;           // Boolean 
representation of additionalProperties
+       private Schema additionalPropertiesSchema;             // Schema 
representation of additionalProperties
+       private List<String> _enum;
+       private List<Schema> allOf;
+       private List<Schema> anyOf;
+       private List<Schema> oneOf;
+       private Schema not;
+       private URI ref;
+       private SchemaMap schemaMap;
+       private Schema master = this;
+
+       /**
+        * Default constructor.
+        */
+       public Schema() {}
+
+       
//--------------------------------------------------------------------------------
+       // Bean properties
+       
//--------------------------------------------------------------------------------
+
+       /**
+        * Bean property getter:  <property>name</property>.
+        *
+        * @return The value of the <property>name</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        */
+       @BeanIgnore
+       public String getName() {
+               return name;
+       }
+
+       /**
+        * Bean property setter:  <property>name</property>.
+        *
+        * @param name The new value for the <property>name</property> property 
on this bean.
+        * @return This object (for method chaining).
+        */
+       @BeanIgnore
+       public Schema setName(String name) {
+               this.name = name;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>id</property>.
+        *
+        * @return The value of the <property>id</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        */
+       public URI getId() {
+               return id;
+       }
+
+       /**
+        * Bean property setter:  <property>id</property>.
+        *
+        * @param id The new value for the <property>id</property> property on 
this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setId(URI id) {
+               this.id = id;
+               return this;
+       }
+
+       /**
+        * Bean property setter:  <property>id</property>.
+        *
+        * @param id The new value for the <property>id</property> property on 
this bean.
+        *      The parameter must be a valid URI.  It can be <jk>null</jk>.
+        * @return This object (for method chaining).
+        */
+       public Schema setId(String id) {
+               return setId(id == null ? null : URI.create(id));
+       }
+
+       /**
+        * Bean property getter:  <property>$schema</property>.
+        *
+        * @return The value of the <property>$schema</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       @BeanProperty(name="$schema")
+       public URI getSchemaVersionUri() {
+               return schemaVersion;
+       }
+
+       /**
+        * Bean property setter:  <property>$schema</property>.
+        *
+        * @param schemaVersion The new value for the 
<property>schemaVersion</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       @BeanProperty(name="$schema")
+       public Schema setSchemaVersionUri(URI schemaVersion) {
+               this.schemaVersion = schemaVersion;
+               return this;
+       }
+
+       /**
+        * Bean property setter:  <property>schemaVersion</property>.
+        *
+        * @param schemaVersion The new value for the 
<property>schemaVersion</property> property on this bean.
+        *      The parameter must be a valid URI.  It can be <jk>null</jk>.
+        * @return This object (for method chaining).
+        */
+       public Schema setSchemaVersionUri(String schemaVersion) {
+               return setSchemaVersionUri(schemaVersion == null ? null : 
URI.create(schemaVersion));
+       }
+
+       /**
+        * Bean property getter:  <property>title</property>.
+        *
+        * @return The value of the <property>title</property> property, or 
<jk>null</jk> if it is not set.
+        */
+       public String getTitle() {
+               return title;
+       }
+
+       /**
+        * Bean property setter:  <property>title</property>.
+        *
+        * @param title The new value for the <property>title</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setTitle(String title) {
+               this.title = title;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>description</property>.
+        *
+        * @return The value of the <property>description</property> property, 
or <jk>null</jk> if it is not set.
+        */
+       public String getDescription() {
+               return description;
+       }
+
+       /**
+        * Bean property setter:  <property>description</property>.
+        *
+        * @param description The new value for the 
<property>description</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setDescription(String description) {
+               this.description = description;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>type</property>.
+        *
+        * @return The value of the <property>type</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        *      Can be either a {@link JsonType} or {@link JsonTypeArray} 
depending on what value was used to set it.
+        */
+       @BeanProperty(transform=JsonTypeOrJsonTypeArrayTransform.class)
+       public Object getType() {
+               if (typeJsonType != null)
+                       return typeJsonType;
+               return typeJsonTypeArray;
+       }
+
+       /**
+        * Bean property getter:  <property>type</property>.
+        * <p>
+        * Convenience method for returning the <property>type</property> 
property when it is a {@link JsonType} value.
+        *
+        * @return The currently set value, or <jk>null</jk> if the property is 
not set, or is set as a {@link JsonTypeArray}.
+        */
+       @BeanIgnore
+       public JsonType getTypeAsJsonType() {
+               return typeJsonType;
+       }
+
+       /**
+        * Bean property getter:  <property>type</property>.
+        * <p>
+        * Convenience method for returning the <property>type</property> 
property when it is a {@link JsonTypeArray} value.
+        *
+        * @return The currently set value, or <jk>null</jk> if the property is 
not set, or is set as a {@link JsonType}.
+        */
+       @BeanIgnore
+       public JsonTypeArray getTypeAsJsonTypeArray() {
+               return typeJsonTypeArray;
+       }
+
+       /**
+        * Bean property setter:  <property>type</property>.
+        *
+        * @param type The new value for the <property>type</property> property 
on this bean.
+        *      This object must be of type {@link JsonType} or {@link 
JsonTypeArray}.
+        * @return This object (for method chaining).
+        * @throws BeanRuntimeException If invalid object type passed in.
+        */
+       public Schema setType(Object type) {
+               this.typeJsonType = null;
+               this.typeJsonTypeArray = null;
+               if (type != null) {
+                       if (type instanceof JsonType)
+                               this.typeJsonType = (JsonType)type;
+                       else if (type instanceof JsonTypeArray)
+                               this.typeJsonTypeArray = (JsonTypeArray)type;
+                       else
+                               throw new 
BeanRuntimeException(SchemaProperty.class, "Invalid attribute type ''{0}'' 
passed in.  Must be one of the following:  SimpleType, SimpleTypeArray", 
type.getClass().getName());
+               }
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>type</property>.
+        *
+        * @param types The list of items to append to the 
<property>type</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addTypes(JsonType...types) {
+               if (this.typeJsonTypeArray == null)
+                       this.typeJsonTypeArray = new JsonTypeArray();
+               this.typeJsonTypeArray.addAll(types);
+               return this;
+       }
+
+       /**
+        * Used during parsing to convert the <property>type</property> 
property to the correct class type.
+        * <ul class='spaced-list'>
+        *      <li>If parsing a JSON-array, converts to a {@link 
JsonTypeArray}.
+        *      <li>If parsing a JSON-object, converts to a {@link JsonType}.
+        * </ul>
+        * Serialization method is a no-op.
+        */
+       public static class JsonTypeOrJsonTypeArrayTransform extends 
PojoTransform<Object,Object> {
+
+               @Override /* PojoTransform */
+               public Object transform(Object o) throws SerializeException {
+                       return o;
+               }
+
+               @Override /* PojoTransform */
+               public Object normalize(Object o, ClassMeta<?> hint) throws 
ParseException {
+                       BeanContext bc = getBeanContext();
+                       ClassMeta<?> cm = (o instanceof Collection ? 
bc.getClassMeta(JsonTypeArray.class) : bc.getClassMeta(JsonType.class));
+                       return bc.convertToType(o, cm);
+               }
+       }
+
+       /**
+        * Bean property getter:  <property>definitions</property>.
+        *
+        * @return The value of the <property>definitions</property> property 
on this bean, or <jk>null</jk> if it is not set.
+        */
+       public Map<String,Schema> getDefinitions() {
+               return definitions;
+       }
+
+       /**
+        * Bean property setter:  <property>definitions</property>.
+        *
+        * @param definitions The new value for the 
<property>definitions</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setDefinitions(Map<String,Schema> definitions) {
+               this.definitions = definitions;
+               if (definitions != null)
+                       setMasterOn(definitions.values());
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>definitions</property>.
+        *
+        * @param name The key in the definitions map entry.
+        * @param definition The value in the definitions map entry.
+        * @return This object (for method chaining).
+        */
+       public Schema addDefinition(String name, Schema definition) {
+               if (this.definitions == null)
+                       this.definitions = new LinkedHashMap<String,Schema>();
+               this.definitions.put(name, definition);
+               setMasterOn(definition);
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>properties</property>.
+        *
+        * @return The value of the <property>properties</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public Map<String,Schema> getProperties() {
+               return properties;
+       }
+
+       /**
+        * Returns the property with the specified name.
+        * This is equivalent to calling <property>getProperty(name, 
<jk>false</jk>)</property>.
+        *
+        * @param name The property name.
+        * @return The property with the specified name, or <jk>null</jk> if no 
property is specified.
+        */
+       public Schema getProperty(String name) {
+               return getProperty(name, false);
+       }
+
+       /**
+        * Returns the property with the specified name.
+        * If <property>resolve</property> is <jk>true</jk>, the property 
object will automatically be
+        *      resolved by calling {@link #resolve()}.
+        * Therefore, <property>getProperty(name, <jk>true</jk>)</property> is 
equivalent to calling
+        *      <property>getProperty(name).resolve()</property>, except it's 
safe from a potential <property>NullPointerException</property>.
+        *
+        * @param name The property name.
+        * @param resolve If <jk>true</jk>, calls {@link #resolve()} on object 
before returning.
+        * @return The property with the specified name, or <jk>null</jk> if no 
property is specified.
+        */
+       public Schema getProperty(String name, boolean resolve) {
+               if (properties == null)
+                       return null;
+               Schema s = properties.get(name);
+               if (s == null)
+                       return null;
+               if (resolve)
+                       s = s.resolve();
+               return s;
+       }
+
+       /**
+        * Bean property setter:  <property>properties</property>.
+        *
+        * @param properties The new value for the 
<property>properties</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setProperties(Map<String,Schema> properties) {
+               this.properties = properties;
+               if (properties != null)
+                       for (Map.Entry<String,Schema> e : 
properties.entrySet()) {
+                               Schema value = e.getValue();
+                               setMasterOn(value);
+                               value.setName(e.getKey());
+                       }
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>properties</property>.
+        * <p>
+        * Properties must have their <property>name</property> property set on 
them when using this method.
+        *
+        * @param properties The list of items to append to the 
<property>properties</property> property on this bean.
+        * @return This object (for method chaining).
+        * @throws BeanRuntimeException If property is found without a set 
<property>name</property> property.
+        */
+       public Schema addProperties(Schema...properties) {
+               if (this.properties == null)
+                       this.properties = new LinkedHashMap<String,Schema>();
+               for (Schema p : properties) {
+                       if (p.getName() == null)
+                               throw new BeanRuntimeException(Schema.class, 
"Invalid property passed to Schema.addProperties().  Property name was null.");
+                       setMasterOn(p);
+                       this.properties.put(p.getName(), p);
+               }
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>patternProperties</property>.
+        *
+        * @return The value of the <property>patternProperties</property> 
property on this bean, or <jk>null</jk> if it is not set.
+        */
+       public Map<String,Schema> getPatternProperties() {
+               return patternProperties;
+       }
+
+       /**
+        * Bean property setter:  <property>patternProperties</property>.
+        *
+        * @param patternProperties The new value for the 
<property>patternProperties</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setPatternProperties(Map<String,Schema> 
patternProperties) {
+               this.patternProperties = patternProperties;
+               if (patternProperties != null)
+                       for (Map.Entry<String,Schema> e : 
patternProperties.entrySet()) {
+                               Schema s = e.getValue();
+                               setMasterOn(s);
+                               s.setName(e.getKey());
+                       }
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>patternProperties</property>.
+        * <p>
+        * Properties must have their <property>name</property> property set to 
the pattern string when using this method.
+        *
+        * @param properties The list of items to append to the 
<property>patternProperties</property> property on this bean.
+        * @return This object (for method chaining).
+        * @throws BeanRuntimeException If property is found without a set 
<property>name</property> property.
+        */
+       public Schema addPatternProperties(SchemaProperty...properties) {
+               if (this.patternProperties == null)
+                       this.patternProperties = new 
LinkedHashMap<String,Schema>();
+               for (Schema p : properties) {
+                       if (p.getName() == null)
+                               throw new BeanRuntimeException(Schema.class, 
"Invalid property passed to Schema.addProperties().  Property name was null.");
+                       setMasterOn(p);
+                       this.patternProperties.put(p.getName(), p);
+               }
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>dependencies</property>.
+        *
+        * @return The value of the <property>dependencies</property> property 
on this bean, or <jk>null</jk> if it is not set.
+        */
+       public Map<String,Schema> getDependencies() {
+               return dependencies;
+       }
+
+       /**
+        * Bean property setter:  <property>dependencies</property>.
+        *
+        * @param dependencies The new value for the 
<property>dependencies</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setDependencies(Map<String,Schema> dependencies) {
+               this.dependencies = dependencies;
+               if (dependencies != null)
+                       setMasterOn(dependencies.values());
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>dependencies</property>.
+        *
+        * @param name The key of the entry in the dependencies map.
+        * @param dependency The value of the entry in the dependencies map.
+        * @return This object (for method chaining).
+        */
+       public Schema addDependency(String name, Schema dependency) {
+               if (this.dependencies == null)
+                       this.dependencies = new LinkedHashMap<String,Schema>();
+               this.dependencies.put(name, dependency);
+               setMasterOn(dependency);
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>items</property>.
+        *
+        * @return The value of the <property>items</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        *      Can be either a {@link Schema} or {@link SchemaArray} depending 
on what value was used to set it.
+        */
+       @BeanProperty(transform=SchemaOrSchemaArrayTransform.class)
+       public Object getItems() {
+               if (itemsSchema != null)
+                       return itemsSchema;
+               return itemsSchemaArray;
+       }
+
+       /**
+        * Bean property getter:  <property>items</property>.
+        * <p>
+        * Convenience method for returning the <property>items</property> 
property when it is a {@link Schema} value.
+        *
+        * @return The currently set value, or <jk>null</jk> if the property is 
not set, or is set as a {@link SchemaArray}.
+        */
+       @BeanIgnore
+       public Schema getItemsAsSchema() {
+               return itemsSchema;
+       }
+
+       /**
+        * Bean property getter:  <property>items</property>.
+        * <p>
+        * Convenience method for returning the <property>items</property> 
property when it is a {@link SchemaArray} value.
+        *
+        * @return The currently set value, or <jk>null</jk> if the property is 
not set, or is set as a {@link Schema}.
+        */
+       @BeanIgnore
+       public SchemaArray getItemsAsSchemaArray() {
+               return itemsSchemaArray;
+       }
+
+       /**
+        * Used during parsing to convert the <property>items</property> 
property to the correct class type.
+        * <ul class='spaced-list'>
+        *      <li>If parsing a JSON-array, converts to a {@link SchemaArray}.
+        *      <li>If parsing a JSON-object, converts to a {@link Schema}.
+        * </ul>
+        * Serialization method is a no-op.
+        */
+       public static class SchemaOrSchemaArrayTransform extends 
PojoTransform<Object,Object> {
+
+               @Override /* PojoTransform */
+               public Object transform(Object o) throws SerializeException {
+                       return o;
+               }
+
+               @Override /* PojoTransform */
+               public Object normalize(Object o, ClassMeta<?> hint) throws 
ParseException {
+                       BeanContext bc = getBeanContext();
+                       ClassMeta<?> cm = (o instanceof Collection ? 
bc.getClassMeta(SchemaArray.class) : bc.getClassMeta(Schema.class));
+                       return bc.convertToType(o, cm);
+               }
+       }
+
+       /**
+        * Bean property setter:  <property>items</property>.
+        *
+        * @param items The new value for the <property>items</property> 
property on this bean.
+        *      This object must be of type {@link Schema} or {@link 
SchemaArray}.
+        * @return This object (for method chaining).
+        * @throws BeanRuntimeException If invalid object type passed in.
+        */
+       public Schema setItems(Object items) {
+               this.itemsSchema = null;
+               this.itemsSchemaArray = null;
+               if (items != null) {
+                       if (items instanceof Schema) {
+                               this.itemsSchema = (Schema)items;
+                               setMasterOn(this.itemsSchema);
+                       } else if (items instanceof SchemaArray) {
+                               this.itemsSchemaArray = (SchemaArray)items;
+                               setMasterOn(this.itemsSchemaArray);
+                       } else
+                               throw new 
BeanRuntimeException(SchemaProperty.class, "Invalid attribute type ''{0}'' 
passed in.  Must be one of the following:  Schema, SchemaArray", 
items.getClass().getName());
+               }
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>items</property>.
+        *
+        * @param items The list of items to append to the 
<property>items</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addItems(Schema...items) {
+               if (this.itemsSchemaArray == null)
+                       this.itemsSchemaArray = new SchemaArray();
+               this.itemsSchemaArray.addAll(items);
+               setMasterOn(items);
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>multipleOf</property>.
+        *
+        * @return The value of the <property>multipleOf</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public Number getMultipleOf() {
+               return multipleOf;
+       }
+
+       /**
+        * Bean property setter:  <property>multipleOf</property>.
+        *
+        * @param multipleOf The new value for the 
<property>multipleOf</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMultipleOf(Number multipleOf) {
+               this.multipleOf = multipleOf;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>maximum</property>.
+        *
+        * @return The value of the <property>maximum</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public Number getMaximum() {
+               return maximum;
+       }
+
+       /**
+        * Bean property setter:  <property>maximum</property>.
+        *
+        * @param maximum The new value for the <property>maximum</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMaximum(Number maximum) {
+               this.maximum = maximum;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>exclusiveMaximum</property>.
+        *
+        * @return The value of the <property>exclusiveMaximum</property> 
property on this bean, or <jk>null</jk> if it is not set.
+        */
+       public Boolean isExclusiveMaximum() {
+               return exclusiveMaximum;
+       }
+
+       /**
+        * Bean property setter:  <property>exclusiveMaximum</property>.
+        *
+        * @param exclusiveMaximum The new value for the 
<property>exclusiveMaximum</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setExclusiveMaximum(Boolean exclusiveMaximum) {
+               this.exclusiveMaximum = exclusiveMaximum;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>minimum</property>.
+        *
+        * @return The value of the <property>minimum</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public Number getMinimum() {
+               return minimum;
+       }
+
+       /**
+        * Bean property setter:  <property>minimum</property>.
+        *
+        * @param minimum The new value for the <property>minimum</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMinimum(Number minimum) {
+               this.minimum = minimum;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>exclusiveMinimum</property>.
+        *
+        * @return The value of the <property>exclusiveMinimum</property> 
property on this bean, or <jk>null</jk> if it is not set.
+        */
+       public Boolean isExclusiveMinimum() {
+               return exclusiveMinimum;
+       }
+
+       /**
+        * Bean property setter:  <property>exclusiveMinimum</property>.
+        *
+        * @param exclusiveMinimum The new value for the 
<property>exclusiveMinimum</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setExclusiveMinimum(Boolean exclusiveMinimum) {
+               this.exclusiveMinimum = exclusiveMinimum;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>maxLength</property>.
+        *
+        * @return The value of the <property>maxLength</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public Integer getMaxLength() {
+               return maxLength;
+       }
+
+       /**
+        * Bean property setter:  <property>maxLength</property>.
+        *
+        * @param maxLength The new value for the 
<property>maxLength</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMaxLength(Integer maxLength) {
+               this.maxLength = maxLength;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>minLength</property>.
+        *
+        * @return The value of the <property>minLength</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public Integer getMinLength() {
+               return minLength;
+       }
+
+       /**
+        * Bean property setter:  <property>minLength</property>.
+        *
+        * @param minLength The new value for the 
<property>minLength</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMinLength(Integer minLength) {
+               this.minLength = minLength;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>pattern</property>.
+        *
+        * @return The value of the <property>pattern</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public String getPattern() {
+               return pattern;
+       }
+
+       /**
+        * Bean property setter:  <property>pattern</property>.
+        *
+        * @param pattern The new value for the <property>pattern</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setPattern(String pattern) {
+               this.pattern = pattern;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>additionalItems</property>.
+        *
+        * @return The value of the <property>additionalItems</property> 
property on this bean, or <jk>null</jk> if it is not set.
+        *      Can be either a {@link Boolean} or {@link SchemaArray} 
depending on what value was used to set it.
+        */
+       @BeanProperty(transform=BooleanOrSchemaArrayTransform.class)
+       public Object getAdditionalItems() {
+               if (additionalItemsBoolean != null)
+                       return additionalItemsBoolean;
+               return additionalItemsSchemaArray;
+       }
+
+       /**
+        * Bean property getter:  <property>additionalItems</property>.
+        * <p>
+        * Convenience method for returning the 
<property>additionalItems</property> property when it is a {@link Boolean} 
value.
+        *
+        * @return The currently set value, or <jk>null</jk> if the property is 
not set, or is set as a {@link SchemaArray}.
+        */
+       @BeanIgnore
+       public Boolean getAdditionalItemsAsBoolean() {
+               return additionalItemsBoolean;
+       }
+
+       /**
+        * Bean property getter:  <property>additionalItems</property>.
+        * <p>
+        * Convenience method for returning the 
<property>additionalItems</property> property when it is a {@link SchemaArray} 
value.
+        *
+        * @return The currently set value, or <jk>null</jk> if the property is 
not set, or is set as a {@link Boolean}.
+        */
+       @BeanIgnore
+       public List<Schema> getAdditionalItemsAsSchemaArray() {
+               return additionalItemsSchemaArray;
+       }
+
+       /**
+        * Bean property setter:  <property>additionalItems</property>.
+        *
+        * @param additionalItems The new value for the 
<property>additionalItems</property> property on this bean.
+        *      This object must be of type {@link Boolean} or {@link 
SchemaArray}.
+        * @return This object (for method chaining).
+        * @throws BeanRuntimeException If invalid object type passed in.
+        */
+       public Schema setAdditionalItems(Object additionalItems) {
+               this.additionalItemsBoolean = null;
+               this.additionalItemsSchemaArray = null;
+               if (additionalItems != null) {
+                       if (additionalItems instanceof Boolean)
+                               this.additionalItemsBoolean = 
(Boolean)additionalItems;
+                       else if (additionalItems instanceof SchemaArray) {
+                               this.additionalItemsSchemaArray = 
(SchemaArray)additionalItems;
+                               setMasterOn(this.additionalItemsSchemaArray);
+                       } else
+                               throw new 
BeanRuntimeException(SchemaProperty.class, "Invalid attribute type ''{0}'' 
passed in.  Must be one of the following:  Boolean, SchemaArray", 
additionalItems.getClass().getName());
+               }
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>additionalItems</property>.
+        *
+        * @param additionalItems The list of items to append to the 
<property>additionalItems</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addAdditionalItems(Schema...additionalItems) {
+               if (this.additionalItemsSchemaArray == null)
+                       this.additionalItemsSchemaArray = new SchemaArray();
+               this.additionalItemsSchemaArray.addAll(additionalItems);
+               setMasterOn(additionalItems);
+               return this;
+       }
+
+       /**
+        * Used during parsing to convert the 
<property>additionalItems</property> property to the correct class type.
+        * <ul class='spaced-list'>
+        *      <li>If parsing a JSON-array, converts to a {@link SchemaArray}.
+        *      <li>If parsing a JSON-boolean, converts to a {@link Boolean}.
+        * </ul>
+        * Serialization method is a no-op.
+        */
+       public static class BooleanOrSchemaArrayTransform extends 
PojoTransform<Object,Object> {
+
+               @Override /* PojoTransform */
+               public Object transform(Object o) throws SerializeException {
+                       return o;
+               }
+
+               @Override /* PojoTransform */
+               public Object normalize(Object o, ClassMeta<?> hint) throws 
ParseException {
+                       BeanContext bc = getBeanContext();
+                       ClassMeta<?> cm = (o instanceof Collection ? 
bc.getClassMeta(SchemaArray.class) : bc.getClassMeta(Boolean.class));
+                       return bc.convertToType(o, cm);
+               }
+       }
+
+       /**
+        * Bean property getter:  <property>maxItems</property>.
+        *
+        * @return The value of the <property>maxItems</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public Integer getMaxItems() {
+               return maxItems;
+       }
+
+       /**
+        * Bean property setter:  <property>maxItems</property>.
+        *
+        * @param maxItems The new value for the <property>maxItems</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMaxItems(Integer maxItems) {
+               this.maxItems = maxItems;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>minItems</property>.
+        *
+        * @return The value of the <property>minItems</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public Integer getMinItems() {
+               return minItems;
+       }
+
+       /**
+        * Bean property setter:  <property>minItems</property>.
+        *
+        * @param minItems The new value for the <property>minItems</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMinItems(Integer minItems) {
+               this.minItems = minItems;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>uniqueItems</property>.
+        *
+        * @return The value of the <property>uniqueItems</property> property 
on this bean, or <jk>null</jk> if it is not set.
+        */
+       public Boolean getUniqueItems() {
+               return uniqueItems;
+       }
+
+       /**
+        * Bean property setter:  <property>uniqueItems</property>.
+        *
+        * @param uniqueItems The new value for the 
<property>uniqueItems</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setUniqueItems(Boolean uniqueItems) {
+               this.uniqueItems = uniqueItems;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>maxProperties</property>.
+        *
+        * @return The value of the <property>maxProperties</property> property 
on this bean, or <jk>null</jk> if it is not set.
+        */
+       public Integer getMaxProperties() {
+               return maxProperties;
+       }
+
+       /**
+        * Bean property setter:  <property>maxProperties</property>.
+        *
+        * @param maxProperties The new value for the 
<property>maxProperties</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMaxProperties(Integer maxProperties) {
+               this.maxProperties = maxProperties;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>minProperties</property>.
+        *
+        * @return The value of the <property>minProperties</property> property 
on this bean, or <jk>null</jk> if it is not set.
+        */
+       public Integer getMinProperties() {
+               return minProperties;
+       }
+
+       /**
+        * Bean property setter:  <property>minProperties</property>.
+        *
+        * @param minProperties The new value for the 
<property>minProperties</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setMinProperties(Integer minProperties) {
+               this.minProperties = minProperties;
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>required</property>.
+        *
+        * @return The value of the <property>required</property> property on 
this bean, or <jk>null</jk> if it is not set.
+        */
+       public List<String> getRequired() {
+               return required;
+       }
+
+       /**
+        * Bean property setter:  <property>required</property>.
+        *
+        * @param required The new value for the <property>required</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setRequired(List<String> required) {
+               this.required = required;
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>required</property>.
+        *
+        * @param required The list of items to append to the 
<property>required</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addRequired(List<String> required) {
+               if (this.required == null)
+                       this.required = new LinkedList<String>();
+               for (String r : required)
+                       this.required.add(r);
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>required</property>.
+        *
+        * @param required The list of items to append to the 
<property>required</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addRequired(String...required) {
+               if (this.required == null)
+                       this.required = new LinkedList<String>();
+               for (String r : required)
+                       this.required.add(r);
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>required</property>.
+        *
+        * @param properties The list of items to append to the 
<property>required</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addRequired(SchemaProperty...properties) {
+               if (this.required == null)
+                       this.required = new LinkedList<String>();
+               for (SchemaProperty p : properties)
+                       this.required.add(p.getName());
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>additionalProperties</property>.
+        *
+        * @return The value of the <property>additionalProperties</property> 
property on this bean, or <jk>null</jk> if it is not set.
+        *      Can be either a {@link Boolean} or {@link SchemaArray} 
depending on what value was used to set it.
+        */
+       @BeanProperty(transform=BooleanOrSchemaTransform.class)
+       public Object getAdditionalProperties() {
+               if (additionalPropertiesBoolean != null)
+                       return additionalItemsBoolean;
+               return additionalPropertiesSchema;
+       }
+
+       /**
+        * Bean property getter:  <property>additionalProperties</property>.
+        * <p>
+        * Convenience method for returning the 
<property>additionalProperties</property> property when it is a {@link Boolean} 
value.
+        *
+        * @return The currently set value, or <jk>null</jk> if the property is 
not set, or is set as a {@link Schema}.
+        */
+       @BeanIgnore
+       public Boolean getAdditionalPropertiesAsBoolean() {
+               return additionalPropertiesBoolean;
+       }
+
+       /**
+        * Bean property getter:  <property>additionalProperties</property>.
+        * <p>
+        * Convenience method for returning the 
<property>additionalProperties</property> property when it is a {@link Schema} 
value.
+        *
+        * @return The currently set value, or <jk>null</jk> if the property is 
not set, or is set as a {@link Boolean}.
+        */
+       @BeanIgnore
+       public Schema getAdditionalPropertiesAsSchema() {
+               return additionalPropertiesSchema;
+       }
+
+       /**
+        * Bean property setter:  <property>additionalProperties</property>.
+        *
+        * @param additionalProperties The new value for the 
<property>additionalProperties</property> property on this bean.
+        *      This object must be of type {@link Boolean} or {@link Schema}.
+        * @return This object (for method chaining).
+        * @throws BeanRuntimeException If invalid object type passed in.
+        */
+       public Schema setAdditionalProperties(Object additionalProperties) {
+               this.additionalPropertiesBoolean = null;
+               this.additionalPropertiesSchema = null;
+               if (additionalProperties != null) {
+                       if (additionalProperties instanceof Boolean)
+                               this.additionalPropertiesBoolean = 
(Boolean)additionalProperties;
+                       else if (additionalProperties instanceof Schema) {
+                               this.additionalPropertiesSchema = 
(Schema)additionalProperties;
+                               setMasterOn(this.additionalPropertiesSchema);
+                       } else
+                               throw new 
BeanRuntimeException(SchemaProperty.class, "Invalid attribute type ''{0}'' 
passed in.  Must be one of the following:  Boolean, Schema", 
additionalProperties.getClass().getName());
+               }
+               return this;
+       }
+
+       /**
+        * Used during parsing to convert the 
<property>additionalProperties</property> property to the correct class type.
+        * <ul class='spaced-list'>
+        *      <li>If parsing a JSON-object, converts to a {@link Schema}.
+        *      <li>If parsing a JSON-boolean, converts to a {@link Boolean}.
+        * </ul>
+        * Serialization method is a no-op.
+        */
+       public static class BooleanOrSchemaTransform extends 
PojoTransform<Object,Object> {
+
+               @Override /* PojoTransform */
+               public Object transform(Object o) throws SerializeException {
+                       return o;
+               }
+
+               @Override /* PojoTransform */
+               public Object normalize(Object o, ClassMeta<?> hint) throws 
ParseException {
+                       BeanContext bc = getBeanContext();
+                       ClassMeta<?> cm = (o instanceof Boolean ? 
bc.getClassMeta(Boolean.class) : bc.getClassMeta(Schema.class));
+                       return bc.convertToType(o, cm);
+               }
+       }
+
+       /**
+        * Bean property getter:  <property>enum</property>.
+        *
+        * @return The value of the <property>enum</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        */
+       public List<String> getEnum() {
+               return _enum;
+       }
+
+       /**
+        * Bean property setter:  <property>enum</property>.
+        *
+        * @param _enum The new value for the <property>enum</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setEnum(List<String> _enum) {
+               this._enum = _enum;
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>enum</property>.
+        *
+        * @param _enum The list of items to append to the 
<property>enum</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addEnum(String..._enum) {
+               if (this._enum == null)
+                       this._enum = new LinkedList<String>();
+               for (String e : _enum)
+                       this._enum.add(e);
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>allOf</property>.
+        *
+        * @return The value of the <property>allOf</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        */
+       public List<Schema> getAllOf() {
+               return allOf;
+       }
+
+       /**
+        * Bean property setter:  <property>allOf</property>.
+        *
+        * @param allOf The new value for the <property>allOf</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setAllOf(List<Schema> allOf) {
+               this.allOf = allOf;
+               setMasterOn(allOf);
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>allOf</property>.
+        *
+        * @param allOf The list of items to append to the 
<property>allOf</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addAllOf(Schema...allOf) {
+               if (this.allOf == null)
+                       this.allOf = new LinkedList<Schema>();
+               setMasterOn(allOf);
+               for (Schema s : allOf)
+                       this.allOf.add(s);
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>anyOf</property>.
+        *
+        * @return The value of the <property>anyOf</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        */
+       public List<Schema> getAnyOf() {
+               return anyOf;
+       }
+
+       /**
+        * Bean property setter:  <property>anyOf</property>.
+        *
+        * @param anyOf The new value of the <property>anyOf</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setAnyOf(List<Schema> anyOf) {
+               this.anyOf = anyOf;
+               setMasterOn(anyOf);
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>anyOf</property>.
+        *
+        * @param anyOf The list of items to append to the 
<property>anyOf</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addAnyOf(Schema...anyOf) {
+               if (this.anyOf == null)
+                       this.anyOf = new LinkedList<Schema>();
+               setMasterOn(anyOf);
+               for (Schema s : anyOf)
+                       this.anyOf.add(s);
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>oneOf</property>.
+        *
+        * @return The value of the <property>oneOf</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        */
+       public List<Schema> getOneOf() {
+               return oneOf;
+       }
+
+       /**
+        * Bean property setter:  <property>oneOf</property>.
+        *
+        * @param oneOf The new value for the <property>oneOf</property> 
property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setOneOf(List<Schema> oneOf) {
+               this.oneOf = oneOf;
+               setMasterOn(oneOf);
+               return this;
+       }
+
+       /**
+        * Bean property appender:  <property>oneOf</property>.
+        *
+        * @param oneOf The list of items to append to the 
<property>oneOf</property> property on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema addOneOf(Schema...oneOf) {
+               if (this.oneOf == null)
+                       this.oneOf = new LinkedList<Schema>();
+               setMasterOn(oneOf);
+               for (Schema s : oneOf)
+                       this.oneOf.add(s);
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>not</property>.
+        *
+        * @return The value of the <property>not</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        */
+       public Schema getNot() {
+               return not;
+       }
+
+       /**
+        * Bean property setter:  <property>not</property>.
+        *
+        * @param not The new value for the <property>not</property> property 
on this bean.
+        * @return This object (for method chaining).
+        */
+       public Schema setNot(Schema not) {
+               this.not = not;
+               setMasterOn(not);
+               return this;
+       }
+
+       /**
+        * Bean property getter:  <property>$ref</property>.
+        *
+        * @return The value of the <property>$ref</property> property on this 
bean, or <jk>null</jk> if it is not set.
+        */
+       @BeanProperty(name="$ref")
+       public URI getRef() {
+               return ref;
+       }
+
+       /**
+        * Bean property setter:  <property>$ref</property>.
+        *
+        * @param ref The new value for the <property>$ref</property> property 
on this bean.
+        * @return This object (for method chaining).
+        */
+       @BeanProperty(name="$ref")
+       public Schema setRef(URI ref) {
+               this.ref = ref;
+               return this;
+       }
+
+       private void setMasterOn(Schema s) {
+               if (s != null)
+                       s.setMaster(this);
+       }
+
+       private void setMasterOn(Schema[] ss) {
+               if (ss != null)
+                       for (Schema s : ss)
+                               setMasterOn(s);
+       }
+
+       private void setMasterOn(Collection<Schema> ss) {
+               if (ss != null)
+                       for (Schema s : ss)
+                               setMasterOn(s);
+       }
+
+       private void setMasterOn(SchemaArray ss) {
+               if (ss != null)
+                       for (Schema s : ss)
+                               setMasterOn(s);
+       }
+
+       /**
+        * Sets the master schema for this schema and all child schema objects.
+        * <p>
+        * All child elements in a schema should point to a single "master" 
schema in order to
+        *      locate registered SchemaMap objects for resolving external 
schemas.
+        *
+        * @param master The master schema to associate on this and all 
children.  Can be <jk>null</jk>.
+        */
+       protected void setMaster(Schema master) {
+               this.master = master;
+               if (definitions != null)
+                       for (Schema s : definitions.values())
+                               s.setMaster(master);
+               if (properties != null)
+                       for (Schema s : properties.values())
+                               s.setMaster(master);
+               if (patternProperties != null)
+                       for (Schema s : patternProperties.values())
+                               s.setMaster(master);
+               if (dependencies != null)
+                       for (Schema s : dependencies.values())
+                               s.setMaster(master);
+               if (itemsSchema != null)
+                       itemsSchema.setMaster(master);
+               if (itemsSchemaArray != null)
+                       for (Schema s : itemsSchemaArray)
+                               s.setMaster(master);
+               if (additionalItemsSchemaArray != null)
+                       for (Schema s : additionalItemsSchemaArray)
+                               s.setMaster(master);
+               if (additionalPropertiesSchema != null)
+                       additionalPropertiesSchema.setMaster(master);
+               if (allOf != null)
+                       for (Schema s : allOf)
+                               s.setMaster(master);
+               if (anyOf != null)
+                       for (Schema s : anyOf)
+                               s.setMaster(master);
+               if (oneOf != null)
+                       for (Schema s : oneOf)
+                               s.setMaster(master);
+               if (not != null)
+                       not.setMaster(master);
+       }
+
+
+       /**
+        * Bean property setter:  <property>$ref</property>.
+        *
+        * @param ref The new value for the <property>$ref</property> property 
on this bean.
+        *      The parameter must be a valid URI.  It can be <jk>null</jk>.
+        * @return This object (for method chaining).
+        */
+       public Schema setRef(String ref) {
+               return setRef(ref == null ? null : URI.create(ref));
+       }
+
+       /**
+        * If this schema is a reference to another schema (i.e. has its 
<property>$ref</property> property set),
+        *      this method will retrieve the referenced schema from the schema 
map registered with this schema.
+        * If this schema is not a reference, or no schema map is registered 
with this schema, this method
+        *      is a no-op and simply returns this object.
+        *
+        * @return The referenced schema, or <jk>null</jk>.
+        */
+       public Schema resolve() {
+               if (ref == null || master.schemaMap == null)
+                       return this;
+               return master.schemaMap.get(ref);
+       }
+
+       /**
+        * Associates a schema map with this schema for resolving other schemas 
identified
+        *      through <property>$ref</property> properties.
+        *
+        * @param schemaMap The schema map to associate with this schema.  Can 
be <jk>null</jk>.
+        * @return This object (for method chaining).
+        */
+       public Schema setSchemaMap(SchemaMap schemaMap) {
+               this.schemaMap = schemaMap;
+               return this;
+       }
+}

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+/***************************************************************************************************************************
+ * 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.juneau.dto.jsonschema;
+
+import java.util.*;
+
+/**
+ * Represents a list of {@link Schema} objects.
+ * <p>
+ *     Refer to {@link org.apache.juneau.dto.jsonschema} for usage information.
+ *
+ * @author James Bognar (james.bog...@salesforce.com)
+ */
+public class SchemaArray extends LinkedList<Schema> {
+
+       private static final long serialVersionUID = 1L;
+
+       /**
+        * Default constructor.
+        */
+       public SchemaArray() {}
+
+       /**
+        * Constructor with predefined types to add to this list.
+        *
+        * @param schemas The list of schemas in this array.
+        */
+       public SchemaArray(Schema...schemas) {
+               addAll(schemas);
+       }
+
+       /**
+        * Convenience method for adding one or more {@link Schema} objects to
+        *      this array.
+        *
+        * @param schemas The {@link Schema} objects to add to this array.
+        * @return This object (for method chaining).
+        */
+       public SchemaArray addAll(Schema...schemas) {
+               for (Schema s : schemas)
+                       add(s);
+               return this;
+       }
+}

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+/***************************************************************************************************************************
+ * 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.juneau.dto.jsonschema;
+
+import java.io.*;
+import java.net.*;
+import java.util.concurrent.*;
+
+import org.apache.juneau.json.*;
+
+/**
+ * A container for retrieving JSON {@link Schema} objects by URI.
+ * <p>
+ *     Subclasses must implement one of the following methods to load schemas 
from external sources:
+ * <ul class='spaced-list'>
+ *     <li>{@link #getReader(URI)} - If schemas should be loaded from readers 
and automatically parsed.
+ *     <li>{@link #load(URI)} - If you want control over construction of 
{@link Schema} objects.
+ * </ul>
+ *
+ * @author James Bognar (james.bog...@salesforce.com)
+ */
+public abstract class SchemaMap extends ConcurrentHashMap<URI,Schema> {
+
+       private static final long serialVersionUID = 1L;
+
+       @Override /* Map */
+       public Schema get(Object uri) {
+               if (uri == null)
+                       return null;
+               return get(URI.create(uri.toString()));
+       }
+
+       /**
+        * Return the {@link Schema} object at the specified URI.
+        * If this schema object has not been loaded yet, calls {@link 
#load(URI)}.
+        *
+        * @param uri The URI of the schema to retrieve.
+        * @return The Schema, or <jk>null</jk> if schema was not located and 
could not be loaded.
+        */
+       public Schema get(URI uri) {
+               Schema s = super.get(uri);
+               if (s != null)
+                       return s;
+               synchronized(this) {
+                       s = load(uri);
+                       if (s != null) {
+                               // Note:  Can't use add(Schema...) since the ID 
property may not be set.
+                               s.setSchemaMap(this);
+                               put(uri, s);
+                       }
+                       return s;
+               }
+       }
+
+       /**
+        * Convenience method for prepopulating this map with the specified 
schemas.
+        * <p>
+        * The schemas passed in through this method MUST have their ID 
properties set.
+        *
+        * @param schemas The set of schemas to add to this map.
+        * @return This object (for method chaining).
+        * @throws RuntimeException If one or more schema objects did not have 
their ID property set.
+        */
+       public SchemaMap add(Schema...schemas) {
+               for (Schema schema : schemas) {
+                       if (schema.getId() == null)
+                               throw new RuntimeException("Schema with no ID 
passed to SchemaMap.add(Schema...)");
+                       put(schema.getId(), schema);
+                       schema.setSchemaMap(this);
+               }
+               return this;
+       }
+
+       /**
+        * Subclasses must implement either this method or {@link 
#getReader(URI)} to load the schema with the specified URI.
+        * It's up to the implementer to decide where these come from.
+        * <p>
+        * The default implementation calls {@link #getReader(URI)} and parses 
the schema document.
+        * If {@link #getReader(URI)} returns <jk>null</jk>, this method 
returns <jk>null</jk> indicating this is an unreachable document.
+        *
+        * @param uri The URI to load the schema from.
+        * @return The parsed schema.
+        */
+       public Schema load(URI uri) {
+               Reader r = getReader(uri);
+               if (r == null)
+                       return null;
+               try {
+                       return JsonParser.DEFAULT.parse(r, Schema.class);
+               } catch (Exception e) {
+                       throw new RuntimeException(e);
+               } finally {
+                       try {
+                               r.close();
+                       } catch (IOException e) {
+                               // Ignore
+                       }
+               }
+       }
+
+       /**
+        * Subclasses must implement either this method or {@link #load(URI)} 
to load the schema with the specified URI.
+        * It's up to the implementer to decide where these come from.
+        * <p>
+        * The default implementation returns <jk>null</jk>.
+        *
+        * @param uri The URI to connect to and retrieve the contents.
+        * @return The reader from reading the specified URI.
+        */
+       public Reader getReader(URI uri) {
+               return null;
+       }
+}

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+/***************************************************************************************************************************
+ * 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.juneau.dto.jsonschema;
+
+/**
+ * Represents a JSON property in the JSON-Schema core specification.
+ * <p>
+ *     Refer to {@link org.apache.juneau.dto.jsonschema} for usage information.
+ *
+ * @author James Bognar (james.bog...@salesforce.com)
+ */
+public class SchemaProperty extends Schema {
+
+       /**
+        * Default constructor.
+        */
+       public SchemaProperty() {}
+
+       /**
+        * Convenience constructor.
+        *
+        * @param name The name of this property.
+        */
+       public SchemaProperty(String name) {
+               setName(name);
+       }
+
+       /**
+        * Convenience constructor.
+        *
+        * @param name The name of this property.
+        * @param type The JSON type of this property.
+        */
+       public SchemaProperty(String name, JsonType type) {
+               setName(name);
+               setType(type);
+       }
+}
\ No newline at end of file

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+/***************************************************************************************************************************
+ * 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.juneau.dto.jsonschema;
+
+/**
+ * Convenience class for representing a property that's an array of simple 
types.
+ * <p>
+ *     An instance of this object is equivalent to calling...
+ *
+ * <p class='bcode'>
+ *     SchemaProperty p = <jk>new</jk> SchemaProperty(name)
+ *             .setType(JsonType.<jsf>ARRAY</jsf>)
+ *             .setItems(
+ *                     <jk>new</jk> Schema().setType(elementType)
+ *             );
+ * </p>
+ *
+ * @author James Bognar (james.bog...@salesforce.com)
+ */
+public class SchemaPropertySimpleArray extends SchemaProperty {
+
+       /**
+        * Constructor.
+        *
+        * @param name The name of the schema property.
+        * @param elementType The JSON type of the elements in the array.
+        */
+       public SchemaPropertySimpleArray(String name, JsonType elementType) {
+               setName(name);
+               setType(JsonType.ARRAY);
+               setItems(
+                       new Schema().setType(elementType)
+               );
+       }
+}

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+/***************************************************************************************************************************
+ * 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.juneau.dto.jsonschema;
+
+import java.net.*;
+
+/**
+ * Convenience class for representing a schema reference such as 
<js>"{'$ref':'/url/to/ref'}"</js>.
+ * <p>
+ *     An instance of this object is equivalent to calling...
+ *
+ * <p class='bcode'>
+ *     Schema s = <jk>new</jk> Schema().setRef(uri);
+ * </p>
+ *
+ * @author James Bognar (james.bog...@salesforce.com)
+ */
+public class SchemaRef extends Schema {
+
+       /**
+        * Constructor.
+        *
+        * @param uri The URI of the target reference.  Can be <jk>null</jk>.
+        */
+       public SchemaRef(String uri) {
+               this.setRef(uri == null ? null : URI.create(uri));
+       }
+}

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