net.sf.jasperreports.data.cache.BlockColumnStore Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.data.cache;
import java.util.LinkedList;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author Lucian Chirita ([email protected])
*/
public class BlockColumnStore implements ColumnStore
{
private static final Log log = LogFactory.getLog(BlockColumnStore.class);
private final BufferColumnStore bufferStore;
private LinkedList previousBlocks;
public BlockColumnStore(BufferColumnStore bufferStore)
{
this.bufferStore = bufferStore;
}
@Override
public Class getBaseValuesType()
{
return bufferStore.getBaseValuesType();
}
protected void preAdd()
{
if (bufferStore.full())
{
if (previousBlocks == null)
{
previousBlocks = new LinkedList();
}
ColumnValues currentValues = bufferStore.createValues();
previousBlocks.add(currentValues);
bufferStore.resetValues();
}
}
@Override
public void addValue(Object value)
{
preAdd();
bufferStore.addValue(value);
}
@Override
public ColumnValues createValues()
{
ColumnValues currentValues = bufferStore.createValues();
if (previousBlocks == null)
{
return currentValues;
}
previousBlocks.add(currentValues);
BlockColumnValues blockColumnValues = new BlockColumnValues(previousBlocks);
if (log.isDebugEnabled())
{
log.debug(this + ": created block values of size " + blockColumnValues.size() + " by " + bufferStore);
}
return blockColumnValues;
}
@Override
public String toString()
{
return "BlockColumnStore@" + hashCode();
}
}