org.apache.myfaces.shared_tomahawk.util.el.ActionsMap Maven / Gradle / Ivy
/*
* 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.myfaces.shared_tomahawk.util.el;
import java.util.*;
/**
* @author Sylvain Vieujot (latest modification by $Author: skitching $)
* @version $Revision: 355303 $ $Date: 2005-12-09 02:36:08 +0100 (Fr, 09 Dez 2005) $
*
* You can use this class to trigger an action when a boolean is set to true.
*
* Example : in JSF pages, for dataTable, to remove elements :
* Backing bean (#{inboxFace}).
* public ActionsMap getRemoveEmailUnid(){
* return new ActionsMap(){
* public void performAction(String unid) {
* InboxMailDAO dao = getInboxMailDAO();
* TInboxMail email = dao.getByPrimaryKey( unid );
* dao.remove( email );
* }
* };
* }
* JSF page :
* <h:selectBooleanCheckbox value="#{inboxFace.removeEmailUnid[email.unid]}"/>
*/
public abstract class ActionsMap implements Map {
private Set keys;
public ActionsMap(){
// NoOp
}
public ActionsMap(Set keys){
this.keys = keys;
}
/**
* This method should fire the command.
*/
public abstract void performAction(String command);
public int size() {
return keys.size();
}
public boolean isEmpty() {
return keys.isEmpty();
}
public boolean containsKey(Object key) {
return keys.contains( key );
}
public boolean containsValue(Object value) {
if( ! (value instanceof Boolean) )
return false;
return ((Boolean)value).booleanValue();
}
public Object get( Object key) {
return Boolean.FALSE;
}
public Boolean put(String key, Boolean value) {
if( value!=null && value.booleanValue() )
performAction( key );
return Boolean.FALSE;
}
public Object remove(Object key) {
if( keys.remove( key ) )
return Boolean.FALSE;
return null;
}
public void putAll(Map map) {
Iterator it = map.entrySet().iterator();
while (it.hasNext())
{
Entry entry = (Entry) it.next();
Object obj = entry.getValue();
if( (obj instanceof Boolean) && ((Boolean) obj).booleanValue() )
performAction( (String) entry.getKey() );
}
}
public void clear() {
keys.clear();
}
public Set keySet() {
return keys;
}
public Collection values() {
return Collections.nCopies(keys.size(), Boolean.FALSE);
}
public Set entrySet() {
Set set = new HashSet( keys.size() );
Iterator it = keys.iterator();
while (it.hasNext())
{
String command = (String) it.next();
set.add( new CommandEntry(command) );
}
return set;
}
private class CommandEntry implements Entry{
private final String command;
private boolean commandPerformed = false;
public CommandEntry(String command){
this.command = command;
}
public Object getKey() {
return command;
}
public Object getValue() {
return Boolean.valueOf(commandPerformed);
}
public Object setValue(Object performCommand) {
if( (performCommand instanceof Boolean) && ((Boolean)performCommand).booleanValue() ){
performAction( command );
commandPerformed = true;
}
return Boolean.valueOf(commandPerformed);
}
}
}