1 /*
2 * $Id: ManagedBeanELResolver.java,v 1.19.4.1 2007/12/03 18:33:51 rlubke Exp $
3 */
4 /*
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
6 *
7 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
8 *
9 * The contents of this file are subject to the terms of either the GNU
10 * General Public License Version 2 only ("GPL") or the Common Development
11 * and Distribution License("CDDL") (collectively, the "License"). You
12 * may not use this file except in compliance with the License. You can obtain
13 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
14 * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
15 * language governing permissions and limitations under the License.
16 *
17 * When distributing the software, include this License Header Notice in each
18 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
19 * Sun designates this particular file as subject to the "Classpath" exception
20 * as provided by Sun in the GPL Version 2 section of the License file that
21 * accompanied this code. If applicable, add the following below the License
22 * Header, with the fields enclosed by brackets [] replaced by your own
23 * identifying information: "Portions Copyrighted [year]
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29 * only the GPL Version 2, indicate your decision by adding "[Contributor]
30 * elects to include this software in this distribution under the [CDDL or GPL
31 * Version 2] license." If you don't indicate a single choice of license, a
32 * recipient has the option to distribute your version of this file under
33 * either the CDDL, the GPL Version 2 or to extend the choice of license to
34 * its licensees as provided above. However, if you add GPL Version 2 code
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38 */
39
40 package com.sun.faces.el;
41
42 import com.sun.faces.application.ApplicationAssociate;
43 import com.sun.faces.mgbean.BeanBuilder;
44 import com.sun.faces.mgbean.BeanManager;
45 import com.sun.faces.util.MessageUtils;
46 import com.sun.faces.util.Util;
47
48 import javax.el.ELContext;
49 import javax.el.ELException;
50 import javax.el.ELResolver;
51 import javax.el.PropertyNotFoundException;
52 import javax.faces.context.ExternalContext;
53 import javax.faces.context.FacesContext;
54 import java.beans.FeatureDescriptor;
55 import java.util.ArrayList;
56 import java.util.Collections;
57 import java.util.Iterator;
58 import java.util.List;
59 import java.util.Map;
60
61 public class ManagedBeanELResolver extends ELResolver {
62
63 public ManagedBeanELResolver() {
64 }
65
66 public Object getValue(ELContext context, Object base, Object property)
67 throws ELException {
68 if (base != null) {
69 return null;
70 }
71 if (property == null) {
72 String message = MessageUtils.getExceptionMessageString
73 (MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "property");
74 throw new PropertyNotFoundException(message);
75 }
76
77 Object result = null;
78 FacesContext facesContext = (FacesContext)
79 context.getContext(FacesContext.class);
80 BeanManager manager =
81 ApplicationAssociate.getCurrentInstance().getBeanManager();
82 String beanName = property.toString();
83 if (manager != null
84 && manager.isManaged(beanName)
85 && !manager.isBeanInScope(beanName, facesContext)) {
86
87 // no bean found in scope. create a new instance
88 result = manager.create(beanName, facesContext);
89 context.setPropertyResolved(result != null);
90 }
91
92 return result;
93 }
94
95
96 public Class<?> getType(ELContext context, Object base, Object property)
97 throws ELException {
98
99 if (base == null && property == null) {
100 String message = MessageUtils.getExceptionMessageString
101 (MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "base and property"); // ?????
102 throw new PropertyNotFoundException(message);
103 }
104
105 return null;
106
107 }
108
109 public void setValue(ELContext context, Object base, Object property,
110 Object val) throws ELException {
111
112 if (base == null && property == null) {
113 String message = MessageUtils.getExceptionMessageString
114 (MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "base and property"); // ?????
115 throw new PropertyNotFoundException(message);
116 }
117
118 // The spec states that nothing ManagedBeanELResolver should
119 // do nothing in setValue() so that the BeanELResolver can do its
120 // thing, however, in 1.1, calling setValue() for a reference
121 // that happened to be a managed bean cause the bean to be created
122 // and pushed to scope if it wasn't already there. So ultimately,
123 // the user should be able to create a ValueExpression and call
124 // setValue() and expect it to work without having to call getValue()
125 // first.
126 FacesContext facesContext = (FacesContext)
127 context.getContext(FacesContext.class);
128 BeanManager manager =
129 ApplicationAssociate.getCurrentInstance().getBeanManager();
130 String beanName = property.toString();
131 if (manager != null
132 && manager.isManaged(beanName)
133 && !manager.isBeanInScope(beanName, facesContext)) {
134
135 // no bean found in scope. create a new instance
136 manager.create(beanName, facesContext);
137 }
138
139 }
140
141 public boolean isReadOnly(ELContext context, Object base, Object property)
142 throws ELException {
143 if (base != null) {
144 return false;
145 }
146 if (property == null) {
147 String message = MessageUtils.getExceptionMessageString
148 (MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "property");
149 throw new PropertyNotFoundException(message);
150 }
151
152 return false;
153 }
154
155 public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object base) {
156
157 if (base != null) {
158 return null;
159 }
160
161 FacesContext facesContext =
162 (FacesContext) context.getContext(FacesContext.class);
163 BeanManager beanManager =
164 ApplicationAssociate.getCurrentInstance().getBeanManager();
165 if (beanManager == null || beanManager.getRegisteredBeans().isEmpty()) {
166 List<FeatureDescriptor> l = Collections.emptyList();
167 return l.iterator();
168 }
169
170 Map<String,BeanBuilder> beans = beanManager.getRegisteredBeans();
171 List<FeatureDescriptor> list =
172 new ArrayList<FeatureDescriptor>(beans.size());
173 // iterate over the list of managed beans
174 for (Map.Entry<String,BeanBuilder> bean : beans.entrySet()) {
175 String beanName = bean.getKey();
176 BeanBuilder builder = bean.getValue();
177 String loc = Util.getLocaleFromContextOrSystem(facesContext).toString();
178 Map<String,String> descriptions = builder.getDescriptions();
179
180 String description = null;
181 if (descriptions != null) {
182 description = descriptions.get(loc);
183 if (description == null) {
184 description = descriptions.get("DEFAULT");
185 }
186 }
187 list.add(Util.getFeatureDescriptor(beanName,
188 beanName,
189 (description == null) ? "" : description,
190 false,
191 false,
192 true,
193 builder.getBeanClass(),
194 Boolean.TRUE));
195 }
196
197 return list.iterator();
198 }
199
200 public Class<?> getCommonPropertyType(ELContext context, Object base) {
201 if (base != null) {
202 return null;
203 }
204 return Object.class;
205 }
206
207 }
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