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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.Objects;
import java.util.ResourceBundle;
public class ResourceBundleELResolver extends ELResolver {
public ResourceBundleELResolver() {
super();
}
@Override
public Object getValue(ELContext context, Object base, Object property) {
Objects.requireNonNull(context);
if (base instanceof ResourceBundle) {
context.setPropertyResolved(base, property);
if (property != null) {
try {
return ((ResourceBundle) base).getObject(property
.toString());
} catch (MissingResourceException mre) {
return "???" + property.toString() + "???";
}
}
}
return null;
}
@Override
public Class<?> getType(ELContext context, Object base, Object property) {
Objects.requireNonNull(context);
if (base instanceof ResourceBundle) {
context.setPropertyResolved(base, property);
}
return null;
}
@Override
public void setValue(ELContext context, Object base, Object property,
Object value) {
Objects.requireNonNull(context);
if (base instanceof ResourceBundle) {
context.setPropertyResolved(base, property);
throw new PropertyNotWritableException(Util.message(context,
"resolverNotWritable", base.getClass().getName()));
}
}
@Override
public boolean isReadOnly(ELContext context, Object base, Object property) {
Objects.requireNonNull(context);
if (base instanceof ResourceBundle) {
context.setPropertyResolved(base, property);
return true;
}
return false;
}
@Override
public Iterator<FeatureDescriptor> getFeatureDescriptors(
ELContext context, Object base) {
if (base instanceof ResourceBundle) {
List<FeatureDescriptor> feats = new ArrayList<>();
Enumeration<String> e = ((ResourceBundle) base).getKeys();
FeatureDescriptor feat;
String key;
while (e.hasMoreElements()) {
key = e.nextElement();
feat = new FeatureDescriptor();
feat.setDisplayName(key);
feat.setShortDescription("");
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;
}
@Override
public Class<?> getCommonPropertyType(ELContext context, Object base) {
if (base instanceof ResourceBundle) {
return String.class;
}
return null;
}
}
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