/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.layout;
import org.pentaho.reporting.engine.classic.core.ReportAttributeMap;
import org.pentaho.reporting.engine.classic.core.layout.model.RenderNode;
import org.pentaho.reporting.engine.classic.core.style.StyleSheet;
import org.pentaho.reporting.engine.classic.core.util.InstanceID;
import org.pentaho.reporting.libraries.base.util.LFUMap;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
/**
* Creation-Date: 26.04.2007, 20:23:40
*
* @author Thomas Morgner
*/
public class TextCache
{
public static class Result
{
private RenderNode[] text;
private RenderNode[] finish;
private StyleSheet styleSheet;
private ReportAttributeMap attributeMap;
protected Result(final RenderNode[] text, final RenderNode[] finish,
final StyleSheet styleSheet,
final ReportAttributeMap attributeMap)
{
this.styleSheet = styleSheet;
this.attributeMap = attributeMap;
this.text = (RenderNode[]) text.clone();
this.finish = (RenderNode[]) finish.clone();
}
public ReportAttributeMap getAttributeMap()
{
return attributeMap;
}
public StyleSheet getStyleSheet()
{
return styleSheet;
}
public RenderNode[] getText()
{
final RenderNode[] nodes = (RenderNode[]) text.clone();
final int nodeCount = nodes.length;
for (int i = 0; i < nodeCount; i++)
{
final RenderNode node = nodes[i];
nodes[i] = node.derive(true);
}
return nodes;
}
public RenderNode[] getFinish()
{
final RenderNode[] nodes = (RenderNode[]) finish.clone();
final int nodeCount = nodes.length;
for (int i = 0; i < nodeCount; i++)
{
final RenderNode node = nodes[i];
nodes[i] = node.derive(true);
}
return nodes;
}
}
private static class InternalResult extends Result
{
private long changeTracker;
private long attrChangeTracker;
private String originalText;
protected InternalResult(final RenderNode[] text, final RenderNode[] finish,
final StyleSheet styleSheet,
final long styleChangeTracker,
final ReportAttributeMap attributeMap,
final long attrChangeTracker,
final String originalText)
{
super(text, finish, styleSheet, attributeMap);
this.changeTracker = styleChangeTracker;
this.attrChangeTracker = attrChangeTracker;
this.originalText = originalText;
}
public boolean isValid(final long changeTracker,
final long attrsChangeTracker,
final String text)
{
if (changeTracker != this.changeTracker)
{
return false;
}
if (attrsChangeTracker != this.attrChangeTracker)
{
return false;
}
return ObjectUtilities.equal(text, originalText);
}
}
private LFUMap cache;
public TextCache(final int maxEntries)
{
cache = new LFUMap(maxEntries);
}
public void store(final InstanceID instanceID,
final long styleChangeTracker,
final long attrChangeTracker,
final String originalText,
final StyleSheet styleSheet,
final ReportAttributeMap attributeMap,
final RenderNode[] text,
final RenderNode[] finish)
{
cache.put(instanceID, new InternalResult
(text, finish, styleSheet, styleChangeTracker, attributeMap, attrChangeTracker, originalText));
// cache.validate();
}
public Result get(final InstanceID instanceID, final long styleChangeTracker,
final long attributeChangeTracker, final String originalText)
{
final InternalResult o = (InternalResult) cache.get(instanceID);
if (o == null)
{
return null;
}
if (o.isValid(styleChangeTracker, attributeChangeTracker, originalText) == false)
{
cache.remove(instanceID);
// cache.validate();
return null;
}
// cache.validate();
return o;
}
}