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Free Java Reporting Library
/*
* 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 org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author Lucian Chirita ([email protected])
*/
public class BooleanStore implements BufferColumnStore
{
private static final Log log = LogFactory.getLog(BooleanStore.class);
private final int size;
private final LongArrayStore longArrayStore;
private long currentLong;
private int count;
private boolean min;
private boolean max;
public BooleanStore(int size)
{
this.size = size;
int longSize = 1 + ((size - 1) >>> 6);
this.longArrayStore = new LongArrayStore(longSize);
reset();
if (log.isDebugEnabled())
{
log.debug(this + ": created long store " + longArrayStore);
}
}
private void reset()
{
count = 0;
min = true;
max = false;
currentLong = 0;
}
@Override
public Class getBaseValuesType()
{
return Boolean.class;
}
@Override
public void addValue(Object object)
{
if (!(object instanceof Boolean))
{
throw new IllegalArgumentException();
}
boolean value = (Boolean) object;
if (value)
{
currentLong |= 1L << count;
}
if ((count & 0x3F) == 0x3F)
{
longArrayStore.add(currentLong);
currentLong = 0;
}
++count;
min &= value;
max |= value;
}
@Override
public boolean full()
{
return count >= size;
}
@Override
public void resetValues()
{
reset();
longArrayStore.resetValues();
}
@Override
public ColumnValues createValues()
{
if (count == 0)
{
if (log.isDebugEnabled())
{
log.debug(this + ": empty values");
}
return EmptyColumnValues.instance();
}
if (count == 1)
{
if (log.isDebugEnabled())
{
log.debug(this + ": single value");
}
return new SingleObjectValue(min);
}
if (min == max)
{
if (log.isDebugEnabled())
{
log.debug(this + ": constant value of size " + count);
}
return new ConstantColumnValue(count, min);
}
// add the last value
if ((count & 0x3F) != 0)
{
longArrayStore.add(currentLong);
}
if (log.isDebugEnabled())
{
log.debug(this + ": creating long store of boolean size " +count);
}
ColumnValues longValues = longArrayStore.createValues();
return new BooleanValues(count, longValues);
}
@Override
public String toString()
{
return "BooleanStore@" + hashCode();
}
}