net.sf.jasperreports.data.cache.BlockColumnValues Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2023 Cloud Software Group, 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.io.IOException;
import java.io.Serializable;
import java.util.List;
import net.sf.jasperreports.engine.JRConstants;
/**
* @author Lucian Chirita ([email protected])
*/
public class BlockColumnValues implements ColumnValues, Serializable
{
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
private int size;
private ColumnValues[] blocks;
public BlockColumnValues(List blocks)
{
ColumnValues[] blocksArray = new ColumnValues[blocks.size()];
this.blocks = blocks.toArray(blocksArray);
int totalSize = 0;
for (ColumnValues values : this.blocks)
{
totalSize += values.size();
}
this.size = totalSize;
}
private void writeObject(java.io.ObjectOutputStream out) throws IOException
{
out.writeInt(size);
out.writeInt(blocks.length);
for (int i = 0; i < blocks.length; i++)
{
out.writeUnshared(blocks[i]);
}
}
private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException
{
size = in.readInt();
int blockCount = in.readInt();
blocks = new ColumnValues[blockCount];
for (int i = 0; i < blockCount; i++)
{
blocks[i] = (ColumnValues) in.readUnshared();
}
}
@Override
public int size()
{
return size;
}
@Override
public ColumnValuesIterator iterator()
{
return new ValuesIterator();
}
protected class ValuesIterator implements ColumnValuesIterator
{
private int blockIndex;
private ColumnValuesIterator blockIterator;
public ValuesIterator()
{
blockIndex = -1;
}
@Override
public void moveFirst()
{
blockIndex = -1;
blockIterator = null;
}
@Override
public boolean next()
{
do
{
if (blockIterator != null)
{
if (blockIterator.next())
{
return true;
}
blockIterator = null;
}
if (blockIndex + 1 >= blocks.length)
{
return false;
}
++blockIndex;
blockIterator = blocks[blockIndex].iterator();
}
while (true);// exit through one of the returns
}
@Override
public Object get()
{
if (blockIterator == null)
{
throw new IllegalStateException();
}
return blockIterator.get();
}
}
}