/**
* Licensed under the Common Development and Distribution License,
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.sun.com/cddl/
*
* 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 com.sun.facelets.tag.jsf.core;
import java.io.IOException;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import java.util.Set;
import javax.el.ELException;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import com.sun.facelets.FaceletContext;
import com.sun.facelets.FaceletException;
import com.sun.facelets.tag.TagAttribute;
import com.sun.facelets.tag.TagAttributeException;
import com.sun.facelets.tag.TagConfig;
import com.sun.facelets.tag.TagHandler;
import com.sun.facelets.tag.jsf.ComponentSupport;
/**
* Load a resource bundle localized for the Locale of the current view, and
* expose it (as a Map) in the request attributes of the current request. <p/>
* See <a target="_new"
* href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/tlddocs/f/loadBundle.html">tag
* documentation</a>.
*
* @author Jacob Hookom
* @version $Id: LoadBundleHandler.java,v 1.3 2007/04/08 16:54:47 youngm Exp $
*/
public final class LoadBundleHandler extends TagHandler {
private final static class ResourceBundleMap implements Map {
private final static class ResourceEntry implements Map.Entry {
protected final String key;
protected final String value;
public ResourceEntry(String key, String value) {
this.key = key;
this.value = value;
}
public Object getKey() {
return this.key;
}
public Object getValue() {
return this.value;
}
public Object setValue(Object value) {
throw new UnsupportedOperationException();
}
public int hashCode() {
return this.key.hashCode();
}
public boolean equals(Object obj) {
return (obj instanceof ResourceEntry && this.hashCode() == obj
.hashCode());
}
}
protected final ResourceBundle bundle;
public ResourceBundleMap(ResourceBundle bundle) {
this.bundle = bundle;
}
public void clear() {
throw new UnsupportedOperationException();
}
public boolean containsKey(Object key) {
try {
bundle.getString(key.toString());
return true;
} catch (MissingResourceException e) {
return false;
}
}
public boolean containsValue(Object value) {
throw new UnsupportedOperationException();
}
public Set entrySet() {
Enumeration e = this.bundle.getKeys();
Set s = new HashSet();
String k;
while (e.hasMoreElements()) {
k = (String) e.nextElement();
s.add(new ResourceEntry(k, this.bundle.getString(k)));
}
return s;
}
public Object get(Object key) {
try {
return this.bundle.getObject((String) key);
} catch( java.util.MissingResourceException mre ) {
return "???"+key+"???";
}
}
public boolean isEmpty() {
return false;
}
public Set keySet() {
Enumeration e = this.bundle.getKeys();
Set s = new HashSet();
while (e.hasMoreElements()) {
s.add(e.nextElement());
}
return s;
}
public Object put(Object key, Object value) {
throw new UnsupportedOperationException();
}
public void putAll(Map t) {
throw new UnsupportedOperationException();
}
public Object remove(Object key) {
throw new UnsupportedOperationException();
}
public int size() {
return this.keySet().size();
}
public Collection values() {
Enumeration e = this.bundle.getKeys();
Set s = new HashSet();
while (e.hasMoreElements()) {
s.add(this.bundle.getObject((String) e.nextElement()));
}
return s;
}
}
private final TagAttribute basename;
private final TagAttribute var;
/**
* @param config
*/
public LoadBundleHandler(TagConfig config) {
super(config);
this.basename = this.getRequiredAttribute("basename");
this.var = this.getRequiredAttribute("var");
}
/**
* See taglib documentation.
*
* @see com.sun.facelets.FaceletHandler#apply(com.sun.facelets.FaceletContext,
* javax.faces.component.UIComponent)
*/
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException, FacesException, FaceletException, ELException {
UIViewRoot root = ComponentSupport.getViewRoot(ctx, parent);
ResourceBundle bundle = null;
try {
String name = this.basename.getValue(ctx);
ClassLoader cl = Thread.currentThread().getContextClassLoader();
if (root != null && root.getLocale() != null) {
bundle = ResourceBundle.getBundle(name, root.getLocale(), cl);
} else {
bundle = ResourceBundle
.getBundle(name, Locale.getDefault(), cl);
}
} catch (Exception e) {
throw new TagAttributeException(this.tag, this.basename, e);
}
ResourceBundleMap map = new ResourceBundleMap(bundle);
FacesContext faces = ctx.getFacesContext();
faces.getExternalContext().getRequestMap().put(this.var.getValue(ctx),
map);
}
}