/*
* 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 org.apache.commons.chain.web.portlet;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.portlet.PortletRequest;
import org.apache.commons.chain.web.MapEntry;
/**
* <p>Private implementation of <code>Map</code> for portlet request
* attributes.</p>
*
* @author Craig R. McClanahan
* @version $Revision: 661007 $ $Date: 2008-05-28 17:28:49 +0100 (Wed, 28 May 2008) $
*/
final class PortletRequestScopeMap implements Map {
public PortletRequestScopeMap(PortletRequest request) {
this.request = request;
}
private PortletRequest request = null;
public void clear() {
Iterator keys = keySet().iterator();
while (keys.hasNext()) {
request.removeAttribute((String) keys.next());
}
}
public boolean containsKey(Object key) {
return (request.getAttribute(key(key)) != null);
}
public boolean containsValue(Object value) {
if (value == null) {
return (false);
}
Enumeration keys = request.getAttributeNames();
while (keys.hasMoreElements()) {
Object next = request.getAttribute((String) keys.nextElement());
if (value.equals(next)) {
return (true);
}
}
return (false);
}
public Set entrySet() {
Set set = new HashSet();
Enumeration keys = request.getAttributeNames();
String key;
while (keys.hasMoreElements()) {
key = (String) keys.nextElement();
set.add(new MapEntry(key, request.getAttribute(key), true));
}
return (set);
}
public boolean equals(Object o) {
return (request.equals(o));
}
public Object get(Object key) {
return (request.getAttribute(key(key)));
}
public int hashCode() {
return (request.hashCode());
}
public boolean isEmpty() {
return (size() < 1);
}
public Set keySet() {
Set set = new HashSet();
Enumeration keys = request.getAttributeNames();
while (keys.hasMoreElements()) {
set.add(keys.nextElement());
}
return (set);
}
public Object put(Object key, Object value) {
if (value == null) {
return (remove(key));
}
String skey = key(key);
Object previous = request.getAttribute(skey);
request.setAttribute(skey, value);
return (previous);
}
public void putAll(Map map) {
Iterator entries = map.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry entry = (Map.Entry)entries.next();
put(entry.getKey(), entry.getValue());
}
}
public Object remove(Object key) {
String skey = key(key);
Object previous = request.getAttribute(skey);
request.removeAttribute(skey);
return (previous);
}
public int size() {
int n = 0;
Enumeration keys = request.getAttributeNames();
while (keys.hasMoreElements()) {
keys.nextElement();
n++;
}
return (n);
}
public Collection values() {
List list = new ArrayList();
Enumeration keys = request.getAttributeNames();
while (keys.hasMoreElements()) {
list.add(request.getAttribute((String) keys.nextElement()));
}
return (list);
}
private String key(Object key) {
if (key == null) {
throw new IllegalArgumentException();
} else if (key instanceof String) {
return ((String) key);
} else {
return (key.toString());
}
}
}