/* | |
* $Id: PortletApplicationMap.java 557544 2007-07-19 10:03:06Z nilsga $ | |
* | |
* 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.struts2.portlet; | |
import java.io.Serializable; | |
import java.util.AbstractMap; | |
import java.util.Enumeration; | |
import java.util.HashSet; | |
import java.util.Map; | |
import java.util.Set; | |
import javax.portlet.PortletContext; | |
/** | |
* Portlet specific {@link java.util.Map} implementation representing the | |
* {@link javax.portlet.PortletContext} of a Portlet. | |
* | |
*/ | |
public class PortletApplicationMap extends AbstractMap implements Serializable { | |
private static final long serialVersionUID = 2296107511063504414L; | |
private PortletContext context; | |
private Set<Object> entries; | |
/** | |
* Creates a new map object given the {@link PortletContext}. | |
* | |
* @param ctx The portlet context. | |
*/ | |
public PortletApplicationMap(PortletContext ctx) { | |
this.context = ctx; | |
} | |
/** | |
* Removes all entries from the Map and removes all attributes from the | |
* portlet context. | |
*/ | |
public void clear() { | |
entries = null; | |
Enumeration e = context.getAttributeNames(); | |
while (e.hasMoreElements()) { | |
context.removeAttribute(e.nextElement().toString()); | |
} | |
} | |
/** | |
* Creates a Set of all portlet context attributes as well as context init | |
* parameters. | |
* | |
* @return a Set of all portlet context attributes as well as context init | |
* parameters. | |
*/ | |
public Set entrySet() { | |
if (entries == null) { | |
entries = new HashSet<Object>(); | |
// Add portlet context attributes | |
Enumeration enumeration = context.getAttributeNames(); | |
while (enumeration.hasMoreElements()) { | |
final String key = enumeration.nextElement().toString(); | |
final Object value = context.getAttribute(key); | |
entries.add(new Map.Entry() { | |
public boolean equals(Object obj) { | |
Map.Entry entry = (Map.Entry) obj; | |
return ((key == null) ? (entry.getKey() == null) : key | |
.equals(entry.getKey())) | |
&& ((value == null) ? (entry.getValue() == null) | |
: value.equals(entry.getValue())); | |
} | |
public int hashCode() { | |
return ((key == null) ? 0 : key.hashCode()) | |
^ ((value == null) ? 0 : value.hashCode()); | |
} | |
public Object getKey() { | |
return key; | |
} | |
public Object getValue() { | |
return value; | |
} | |
public Object setValue(Object obj) { | |
context.setAttribute(key.toString(), obj); | |
return value; | |
} | |
}); | |
} | |
// Add portlet context init params | |
enumeration = context.getInitParameterNames(); | |
while (enumeration.hasMoreElements()) { | |
final String key = enumeration.nextElement().toString(); | |
final Object value = context.getInitParameter(key); | |
entries.add(new Map.Entry() { | |
public boolean equals(Object obj) { | |
Map.Entry entry = (Map.Entry) obj; | |
return ((key == null) ? (entry.getKey() == null) : key | |
.equals(entry.getKey())) | |
&& ((value == null) ? (entry.getValue() == null) | |
: value.equals(entry.getValue())); | |
} | |
public int hashCode() { | |
return ((key == null) ? 0 : key.hashCode()) | |
^ ((value == null) ? 0 : value.hashCode()); | |
} | |
public Object getKey() { | |
return key; | |
} | |
public Object getValue() { | |
return value; | |
} | |
public Object setValue(Object obj) { | |
context.setAttribute(key.toString(), obj); | |
return value; | |
} | |
}); | |
} | |
} | |
return entries; | |
} | |
/** | |
* Returns the portlet context attribute or init parameter based on the | |
* given key. If the entry is not found, <tt>null</tt> is returned. | |
* | |
* @param key | |
* the entry key. | |
* @return the portlet context attribute or init parameter or <tt>null</tt> | |
* if the entry is not found. | |
*/ | |
public Object get(Object key) { | |
// Try context attributes first, then init params | |
// This gives the proper shadowing effects | |
String keyString = key.toString(); | |
Object value = context.getAttribute(keyString); | |
return (value == null) ? context.getInitParameter(keyString) : value; | |
} | |
/** | |
* Sets a portlet context attribute given a attribute name and value. | |
* | |
* @param key | |
* the name of the attribute. | |
* @param value | |
* the value to set. | |
* @return the attribute that was just set. | |
*/ | |
public Object put(Object key, Object value) { | |
entries = null; | |
context.setAttribute(key.toString(), value); | |
return get(key); | |
} | |
/** | |
* Removes the specified portlet context attribute. | |
* | |
* @param key | |
* the attribute to remove. | |
* @return the entry that was just removed. | |
*/ | |
public Object remove(Object key) { | |
entries = null; | |
Object value = get(key); | |
context.removeAttribute(key.toString()); | |
return value; | |
} | |
} |