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/**
* ===========================================
* LibLayout : a free Java layouting library
* ===========================================
*
* Project Info: http://reporting.pentaho.org/liblayout/
*
* (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
*
* 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., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: AbstractStore.java 3524 2007-10-16 11:26:31Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.renderer;
import java.io.Serializable;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* Creation-Date: 29.11.2006, 18:30:08
*
* @author Thomas Morgner
*/
public abstract class AbstractStore implements Cloneable, Serializable
{
private Map initialSet;
private HashMap firstSet;
private HashMap lastSet;
public AbstractStore()
{
initialSet = new HashMap();
firstSet = new HashMap();
lastSet = new HashMap();
}
protected void addInternal(final String name, final Object contents)
{
if (firstSet.containsKey(name) == false)
{
firstSet.put(name, contents);
}
lastSet.put(name, contents);
}
protected Object getLastInternal(final String name)
{
final Object lastObject = lastSet.get(name);
if (lastObject != null)
{
return lastSet.get(name);
}
return initialSet.get(name);
}
protected Object getFirstInternal(final String name)
{
final Object firstVal = firstSet.get(name);
if (firstVal != null)
{
return firstSet.get(name);
}
return initialSet.get(name);
}
protected Object getInitialInternal (final String name)
{
return initialSet.get(name);
}
public AbstractStore derive()
{
try
{
final AbstractStore contentStore = (AbstractStore) clone();
contentStore.initialSet = Collections.unmodifiableMap(lastSet);
return contentStore;
}
catch (CloneNotSupportedException e)
{
throw new IllegalStateException("Must not happen");
}
}
public Object clone () throws CloneNotSupportedException
{
final AbstractStore store = (AbstractStore) super.clone();
store.firstSet = (HashMap) firstSet.clone();
store.lastSet = (HashMap) lastSet.clone();
// initial set is immutable.
store.initialSet = initialSet;
return store;
}
}
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