/*
* 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.states;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.pentaho.reporting.engine.classic.core.ReportProcessingException;
import org.pentaho.reporting.engine.classic.core.function.Expression;
/**
* Creation-Date: Dec 15, 2006, 2:24:30 PM
*
* @author Thomas Morgner
*/
public class FunctionStorage implements Serializable
{
private static final boolean PARANOID_CHECK = false;
private HashMap storage;
public FunctionStorage()
{
storage = new HashMap();
}
/**
* Stores expressions at the end of a run.
*
* @param key
* @param expressions
*/
public void store(final FunctionStorageKey key,
final Expression[] expressions,
final int length)
throws ReportProcessingException
{
if (key == null)
{
throw new NullPointerException();
}
if (expressions == null)
{
throw new NullPointerException();
}
try
{
final Expression[] copy = new Expression[length];
for (int i = 0; i < length; i++)
{
copy[i] = (Expression) expressions[i].clone();
}
storage.put(key, copy);
}
catch (CloneNotSupportedException e)
{
throw new ReportProcessingException("Storing expressions failed.");
}
}
public Expression[] restore(final FunctionStorageKey key)
throws ReportProcessingException
{
if (key == null)
{
throw new NullPointerException();
}
try
{
final Expression[] expressions = (Expression[]) storage.get(key);
if (expressions == null)
{
return null;
}
final Expression[] copy = (Expression[]) expressions.clone();
for (int i = 0; i < expressions.length; i++)
{
copy[i] = (Expression) expressions[i].clone();
}
if (PARANOID_CHECK)
{
final Iterator iterator = storage.entrySet().iterator();
while (iterator.hasNext())
{
final Map.Entry entry = (Map.Entry) iterator.next();
if (key.equals(entry.getKey()))
{
final FunctionStorageKey o = (FunctionStorageKey) entry.getKey();
if (key.getReportId() != o.getReportId())
{
throw new IllegalStateException("key.getReportId() != o.getReportId() : " + key.getReportId() + " != " + o.getReportId());
}
}
}
}
return copy;
}
catch (CloneNotSupportedException e)
{
throw new ReportProcessingException("Restoring expressions failed.");
}
}
}