rdonkin 2003/07/27 10:51:46
Added: betwixt/src/java/org/apache/commons/betwixt
BeanProperty.java
Log:
Added support for reading dynabeans
Revision Changes Path
1.1
jakarta-commons/betwixt/src/java/org/apache/commons/betwixt/BeanProperty.java
Index: BeanProperty.java
===================================================================
package org.apache.commons.betwixt;
/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import org.apache.commons.betwixt.expression.Expression;
import org.apache.commons.betwixt.expression.MethodExpression;
import org.apache.commons.betwixt.expression.Updater;
import org.apache.commons.betwixt.expression.MethodUpdater;
import org.apache.commons.betwixt.expression.DynaBeanExpression;
import org.apache.commons.beanutils.DynaProperty;
/**
* Betwixt-centric view of a bean (or pseudo-bean) property.
* This object decouples the way that the (possibly pseudo) property introspection
* is performed from the results of that introspection.
*
* @author Robert Burrell Donkin
* @version $Id: BeanProperty.java,v 1.1 2003/07/27 17:51:46 rdonkin Exp $
*/
public class BeanProperty {
/** The bean name for the property (not null) */
private String propertyName;
/** The type of this property (not null) */
private Class propertyType;
/** The Expression used to read values of this property (possibly null) */
private Expression propertyExpression;
/** The Updater used to write values of this property (possibly null) */
private Updater propertyUpdater;
/**
* Construct a BeanProperty.
* @param propertyName not null
* @param propertyType not null
* @param propertyExpression the Expression used to read the property,
* null if the property is not readable
* @param propertyUpdater the Updater used to write the property,
* null if the property is not writable
*/
public BeanProperty (
String propertyName,
Class propertyType,
Expression propertyExpression,
Updater propertyUpdater) {
this.propertyName = propertyName;
this.propertyType = propertyType;
this.propertyExpression = propertyExpression;
this.propertyUpdater = propertyUpdater;
}
/**
* Constructs a BeanProperty from a <code>PropertyDescriptor</code>.
* @param descriptor not null
*/
public BeanProperty(PropertyDescriptor descriptor) {
this.propertyName = descriptor.getName();
this.propertyType = descriptor.getPropertyType();
Method readMethod = descriptor.getReadMethod();
if ( readMethod != null ) {
this.propertyExpression = new MethodExpression( readMethod );
}
Method writeMethod = descriptor.getWriteMethod();
if ( writeMethod != null ) {
this.propertyUpdater = new MethodUpdater( writeMethod );
}
}
/**
* Constructs a BeanProperty from a <code>DynaProperty</code>
* @param dynaProperty not null
*/
public BeanProperty(DynaProperty dynaProperty) {
this.propertyName = dynaProperty.getName();
this.propertyType = dynaProperty.getType();
this.propertyExpression = new DynaBeanExpression( propertyName );
// todo: add updater
}
/**
* Gets the bean name for this property.
* Betwixt will map this to an xml name.
* @return the bean name for this property, not null
*/
public String getPropertyName() {
return propertyName;
}
/**
* Gets the type of this property.
* @return the property type, not null
*/
public Class getPropertyType() {
return propertyType;
}
/**
* Gets the expression used to read this property.
* @return the expression to be used to read this property
* or null if this property is not readable.
*/
public Expression getPropertyExpression() {
return propertyExpression;
}
/**
* Gets the updater used to write to this properyty.
* @return the Updater to the used to write to this property
* or null if this property is not writable.
*/
public Updater getPropertyUpdater() {
return propertyUpdater;
}
}
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