001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041: package org.netbeans.modules.visualweb.insync.live;
042:
043: import java.beans.PropertyDescriptor;
044: import javax.el.MethodExpression;
045:
046: import javax.faces.application.Application;
047: import javax.faces.el.MethodBinding;
048:
049: import com.sun.faces.util.ConstantMethodBinding;
050:
051: /**
052: * A BeansDesignProperty subclass that knows how to handle the additional processing for JSF Method
053: * Binding. Property field is always in markup, thus always a MarkupProperty.
054: *
055: * @author Carl Quinn
056: * @version 1.0
057: */
058: public class MethodBindDesignProperty extends BeansDesignProperty {
059:
060: MethodBindDesignEvent event;
061:
062: /**
063: * Determines whether or not a property type is a method binding type, and thus should be
064: * handled by this subclass.
065: *
066: * @return whether or not the property type is a method binding type.
067: */
068: public static final boolean isMethodBindingProperty(
069: PropertyDescriptor pd) {
070: return (MethodBinding.class.isAssignableFrom(pd
071: .getPropertyType()))
072: || (MethodExpression.class.isAssignableFrom(pd
073: .getPropertyType()));
074:
075: }
076:
077: private boolean isMethodExpression() {
078: return MethodExpression.class
079: .isAssignableFrom(getPropertyDescriptor()
080: .getPropertyType());
081:
082: }
083:
084: /**
085: *
086: */
087: MethodBindDesignProperty(PropertyDescriptor descriptor,
088: BeansDesignBean lbean) {
089: super (descriptor, lbean);
090: // event will get set by MethodBindDesignEvent callback
091: }
092:
093: void setEventReference(MethodBindDesignEvent event) {
094: this .event = event;
095: }
096:
097: public MethodBindDesignEvent getEventReference() {
098: return event;
099: }
100:
101: /*
102: *
103: */
104: protected void initLive() {
105: ClassLoader oldContextClassLoader = Thread.currentThread()
106: .getContextClassLoader();
107: try {
108: Thread.currentThread().setContextClassLoader(
109: ((LiveUnit) getDesignBean().getDesignContext())
110: .getBeansUnit().getClassLoader());
111: if (property != null) {
112: // intercept if the source is a string that we know is a binding EL
113: Object value = property.getValue(descriptor
114: .getPropertyType());
115: if (value instanceof String)
116: invokeSetter(fromSource((String) value));
117: else
118: super .initLive();
119: }
120: } finally {
121: Thread.currentThread().setContextClassLoader(
122: oldContextClassLoader);
123: }
124: }
125:
126: /*
127: *
128: */
129: protected String toSource(Object value) {
130: if (value instanceof MethodBinding) {
131: MethodBinding mb = (MethodBinding) value;
132: if (mb instanceof ConstantMethodBinding)
133: return (String) mb.invoke(null, null); // a way to get the outcome back out
134: else
135: return mb.getExpressionString();
136: } else if (value instanceof MethodExpression) {
137: MethodExpression me = (MethodExpression) value;
138: return me.getExpressionString();
139: }
140: if (value != null)
141: System.err
142: .println("FMBLP.toSource: Unexpected property value: "
143: + value);
144: return super .toSource(value);
145: }
146:
147: /*
148: *
149: */
150: protected Object fromSourceIncludeUnknown(String sourceValue) {
151: //!CQ only works with 0-arg. TODO: match method signature
152:
153: if (FacesDesignProperty.isBindingValue(sourceValue)) {
154: Application app = liveBean.unit.getFacesContext()
155: .getApplication();
156: if (this .isMethodExpression()) {
157: return app.getExpressionFactory()
158: .createMethodExpression(
159: liveBean.unit.getFacesContext()
160: .getELContext(), sourceValue,
161: String.class, new Class[] {});
162: } else {
163: return app.createMethodBinding(sourceValue,
164: new Class[] {});
165: }
166: } else if (sourceValue.length() > 0) {
167: return new ConstantMethodBinding(sourceValue);
168: }
169: return null;
170: }
171:
172: //-------------------------------------------------------------------------------------- Setters
173:
174: /**
175: *
176: */
177: public boolean setValue(Object value) {
178: // intercept strings that look like MethodBindings and convert those first
179: if (value instanceof String
180: && FacesDesignProperty.isBindingValue((String) value))
181: value = fromSource((String) value);
182:
183: // default: allow super to set something sensible
184: return super .setValue(value);
185: }
186:
187: /**
188: * Pass a value (in object and/or source form) to our bean property, creating it as needed
189: */
190: protected void setBeanProperty(Object value, String valueSource) {
191: super .setBeanProperty(value, valueSource);
192: if (value == FROMSOURCE_UNKNOWNVALUE)
193: value = null;
194: if (event != null)
195: event.propertyChanged(value);
196: }
197:
198: /**
199: *
200: */
201: public boolean unset() {
202: if (super .unset()) {
203: if (event != null)
204: event.propertyChanged(null);
205: return true;
206: }
207: return false;
208: }
209:
210: /**
211: *
212: */
213: public String toString() {
214: return "[FMBLP name:" + descriptor.getName() + " type:"
215: + descriptor.getPropertyType() + " value:" + getValue()
216: + " valueSource:" + getValueSource() + "]";
217: }
218: }
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