/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.pvm.internal.wire.binding;
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import org.jbpm.pvm.internal.util.XmlUtil;
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import org.jbpm.pvm.internal.wire.Descriptor;
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import org.jbpm.pvm.internal.wire.operation.PropertyOperation;
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import org.jbpm.pvm.internal.wire.xml.WireParser;
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import org.jbpm.pvm.internal.xml.Binding;
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import org.jbpm.pvm.internal.xml.Parse;
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import org.jbpm.pvm.internal.xml.Parser;
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import org.w3c.dom.Element;
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/**
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* <p>This {@link Binding} specifies {@link PropertyOperation} (for property injection).</p>
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*
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* <p>A property injection is defined by a <b><code>{@literal <property>}</code></b> xml element.</p>
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*
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* <p>This element must have a attribute "name" or a attribute "setter".
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* <ul>
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* <li>the "name" attribute specifies the name of the property to inject. For a property <code>foo</code>, a setter method named <code>setFoo</code> should exist.</li>
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* <li>the "setter" attribute specifies the name of the setter method to use to inject the property.</li>
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* </ul>
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* If both attributes are present, the setter method is used.
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* </p>
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*
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* <p>This element should contain a child element that defines a {@link Descriptor}.
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* This descriptor will be used to create the object that will be assigned to the field</p>
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*
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* <h3>Example</h3>
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*
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* Consider the following class:
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* <pre> public class Foo {
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* String bar;
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* public void setBar(String bar) {
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* this.bar = bar;
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* }
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* }</pre>
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*
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* The following Xml declaration will create an object 'o' of class 'Foo' (see {@link org.jbpm.pvm.internal.wire.descriptor.ObjectDescriptor}), and
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* the value <code>hello</code> will be assigned to <code>o.bar</code> by calling the <code>setBar</code> method.
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*
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* <pre> <objects>
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* <object name='o' class='Foo'>
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* <property name='bar'>
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* <string value='hello' />
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* </property>
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* </object>
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* </objects></pre>
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*
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* @author Tom Baeyens
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* @author Guillaume Porcher (documentation)
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*
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* @see ObjectBinding
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* @see WireParser
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*/
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public class PropertyBinding extends WireOperationBinding {
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public PropertyBinding() {
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super("property");
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}
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public Object parse(Element element, Parse parse, Parser parser) {
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PropertyOperation propertyOperation = new PropertyOperation();
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if (element.hasAttribute("setter")) {
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propertyOperation.setSetterName(element.getAttribute("setter"));
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} else if (element.hasAttribute("name")) {
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propertyOperation.setPropertyName(element.getAttribute("name"));
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} else {
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parse.addProblem("property must have name or setter attribute: "+XmlUtil.toString(element), element);
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}
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Element descriptorElement = XmlUtil.element(element);
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if (descriptorElement!=null) {
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Descriptor descriptor = (Descriptor) parser.parseElement(descriptorElement, parse, WireParser.CATEGORY_DESCRIPTOR);
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if (descriptor!=null) {
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propertyOperation.setDescriptor(descriptor);
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} else {
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parse.addProblem("couldn't parse property content element as a value descriptor: "+XmlUtil.toString(element), element);
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}
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} else {
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parse.addProblem("property must have 1 descriptor element out of "+parser.getBindings().getTagNames(WireParser.CATEGORY_DESCRIPTOR)+" as content: "+XmlUtil.toString(element), element);
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}
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return propertyOperation;
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}
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}
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