org.jfree.ui.action.DowngradeActionMap Maven / Gradle / Ivy
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/* ========================================================================
* JCommon : a free general purpose class library for the Java(tm) platform
* ========================================================================
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -----------------------
* DowngradeActionMap.java
* -----------------------
* (C)opyright 2003, by Thomas Morgner and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: DowngradeActionMap.java,v 1.4 2007/11/02 17:50:37 taqua Exp $
*
* Changes
* -------
* 28-Oct-2003 : Initial version
* 07-Jun-2004 : Corrected source headers (DG);
*
*/
package org.jfree.ui.action;
import java.util.ArrayList;
import java.util.HashMap;
import javax.swing.Action;
/**
* An actionmap, which is JDK 1.2.2 compatible.
*
* This implementation does not implement the ActionMap interface of
* JDK 1.3 or higher to maintain the compatibility with JDK 1.2 which
* does not know this interface.
*
* The usage is still the same.
*
* @author Thomas Morger
*/
public class DowngradeActionMap {
/** A map containing the key to action mapping. */
private final HashMap actionMap;
/** A list containing the actionkeys in their order of addition. */
private final ArrayList actionList;
/** The parent of this action map. */
private DowngradeActionMap parent;
/**
* Default Constructor. Creates a new empty map.
*/
public DowngradeActionMap() {
this.actionMap = new HashMap();
this.actionList = new ArrayList();
}
/**
* Sets this ActionMap's parent.
*
* @param map the ActionMap that is the parent of this one
*/
public void setParent(final DowngradeActionMap map) {
this.parent = map;
}
/**
* Returns this ActionMap's parent.
*
* @return the ActionMap that is the parent of this one,
* or null if this ActionMap has no parent
*/
public DowngradeActionMap getParent() {
return this.parent;
}
/**
* Adds a binding for key to action.
* If action is null, this removes the current binding
* for key.
*
In most instances, key will be
* action.getValue(NAME).
*
* @param key the key for the action.
* @param action the action to be added.
*/
public void put(final Object key, final Action action) {
if (action == null) {
remove(key);
}
else {
if (this.actionMap.containsKey(key)) {
remove(key);
}
this.actionMap.put(key, action);
this.actionList.add (key);
}
}
/**
* Returns the binding for key, messaging the
* parent ActionMap if the binding is not locally defined.
*
* @param key the key to be queried.
* @return the action for this key, or null if there is no such action.
*/
public Action get(final Object key) {
final Action retval = (Action) this.actionMap.get(key);
if (retval != null) {
return retval;
}
if (this.parent != null) {
return this.parent.get(key);
}
return null;
}
/**
* Removes the binding for key from this ActionMap.
*
* @param key the key to be removed.
*/
public void remove(final Object key) {
this.actionMap.remove(key);
this.actionList.remove(key);
}
/**
* Removes all the mappings from this ActionMap.
*/
public void clear() {
this.actionMap.clear();
this.actionList.clear();
}
/**
* Returns the Action names that are bound in this ActionMap.
*
* @return the keys which are directly bound to this map.
*/
public Object[] keys() {
return this.actionList.toArray();
}
/**
* Returns the number of bindings.
*
* @return the number of entries in this map.
*/
public int size() {
return this.actionMap.size();
}
/**
* Returns an array of the keys defined in this ActionMap and
* its parent. This method differs from keys() in that
* this method includes the keys defined in the parent.
*
* @return all keys of this map and all parents.
*/
public Object[] allKeys() {
if (this.parent == null) {
return keys();
}
final Object[] parentKeys = this.parent.allKeys();
final Object[] key = keys();
final Object[] retval = new Object[parentKeys.length + key.length];
System.arraycopy(key, 0, retval, 0, key.length);
System.arraycopy(retval, 0, retval, key.length, retval.length);
return retval;
}
}