/*
* Copyright 2006 The Apache Software Foundation.
*
* Licensed 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 javax.el;
import java.beans.FeatureDescriptor;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
public class ResourceBundleELResolver extends ELResolver {
public ResourceBundleELResolver() {
super();
}
public Object getValue(ELContext context, Object base, Object property)
throws NullPointerException, PropertyNotFoundException, ELException {
if (context == null) {
throw new NullPointerException();
}
if (base instanceof ResourceBundle) {
context.setPropertyResolved(true);
if (property != null) {
try {
return ((ResourceBundle) base).getObject(property
.toString());
} catch (MissingResourceException mre) {
return "???" + property.toString() + "???";
}
}
}
return null;
}
public Class<?> getType(ELContext context, Object base, Object property)
throws NullPointerException, PropertyNotFoundException, ELException {
if (context == null) {
throw new NullPointerException();
}
if (base instanceof ResourceBundle) {
context.setPropertyResolved(true);
}
return null;
}
public void setValue(ELContext context, Object base, Object property,
Object value) throws NullPointerException,
PropertyNotFoundException, PropertyNotWritableException,
ELException {
if (context == null) {
throw new NullPointerException();
}
if (base instanceof ResourceBundle) {
context.setPropertyResolved(true);
throw new PropertyNotWritableException(message(context,
"resolverNotWriteable", new Object[] { base.getClass()
.getName() }));
}
}
public boolean isReadOnly(ELContext context, Object base, Object property)
throws NullPointerException, PropertyNotFoundException, ELException {
if (context == null) {
throw new NullPointerException();
}
if (base instanceof ResourceBundle) {
context.setPropertyResolved(true);
}
return true;
}
public Iterator getFeatureDescriptors(ELContext context, Object base) {
if (base instanceof ResourceBundle) {
List feats = new ArrayList();
Enumeration e = ((ResourceBundle) base).getKeys();
FeatureDescriptor feat;
String key;
while (e.hasMoreElements()) {
key = (String) e.nextElement();
feat = new FeatureDescriptor();
feat.setDisplayName(key);
feat.setExpert(false);
feat.setHidden(false);
feat.setName(key);
feat.setPreferred(true);
feat.setValue(RESOLVABLE_AT_DESIGN_TIME, Boolean.TRUE);
feat.setValue(TYPE, String.class);
feats.add(feat);
}
return feats.iterator();
}
return null;
}
public Class<?> getCommonPropertyType(ELContext context, Object base) {
if (base instanceof ResourceBundle) {
return String.class;
}
return null;
}
}