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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 java.io.IOException;
import java.io.Serializable;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.data.IndexedDataSource;
/**
* @author Lucian Chirita ([email protected])
*/
public class StandardColumnCacheData implements Serializable, ColumnCacheData
{
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
private static final Log log = LogFactory.getLog(StandardColumnCacheData.class);
private String[] fieldNames;
private int size;
private ColumnValues[] values;
private LinkedHashMap parameters;
public StandardColumnCacheData(String[] fieldNames, int size, ColumnValues[] values,
LinkedHashMap parameters)
{
if (fieldNames == null || values == null || fieldNames.length != values.length)
{
throw new IllegalArgumentException();
}
this.fieldNames = fieldNames;
this.size = size;
this.values = values;
this.parameters = parameters;
}
private void writeObject(java.io.ObjectOutputStream out) throws IOException
{
int paramsCount = parameters == null ? 0 : parameters.size();
out.writeInt(paramsCount);
if (parameters != null)
{
for (Map.Entry entry : parameters.entrySet())
{
out.writeObject(entry.getKey());
out.writeObject(entry.getValue());
}
}
out.writeInt(size);
out.writeInt(fieldNames.length);
for (int i = 0; i < fieldNames.length; i++)
{
out.writeObject(fieldNames[i]);
out.writeObject(values[i]);
}
}
private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException
{
int paramsCount = in.readInt();
if (paramsCount > 0)
{
parameters = new LinkedHashMap(paramsCount * 4 / 3);
for (int i = 0; i < paramsCount; i++)
{
String key = (String) in.readObject();
Object value = in.readObject();
parameters.put(key, value);
}
}
size = in.readInt();
int fieldCount = in.readInt();
fieldNames = new String[fieldCount];
values = new ColumnValues[fieldCount];
for (int i = 0; i < fieldCount; i++)
{
fieldNames[i] = (String) in.readObject();
values[i] = (ColumnValues) in.readObject();
}
}
/* (non-Javadoc)
* @see net.sf.jasperreports.data.cache.ColumnCacheData#isSerializable()
*/
@Override
public boolean isSerializable()
{
// only checking parameters because we know that field values are serializable
boolean serializable = true;
if (parameters != null)
{
for (Map.Entry parameter : parameters.entrySet())
{
Object value = parameter.getValue();
if (value != null && !(value instanceof Serializable))
{
if (log.isDebugEnabled())
{
log.debug("parameter " + parameter.getKey()
+ " has unserializable value of type " + value.getClass().getName());
}
serializable = false;
break;
}
}
}
return serializable;
}
/* (non-Javadoc)
* @see net.sf.jasperreports.data.cache.ColumnCacheData#createDataSource()
*/
@Override
public IndexedDataSource createDataSource()
{
return new ColumnValuesDataSource(fieldNames, size, values);
}
/* (non-Javadoc)
* @see net.sf.jasperreports.data.cache.ColumnCacheData#size()
*/
@Override
public int size()
{
return size;
}
/* (non-Javadoc)
* @see net.sf.jasperreports.data.cache.ColumnCacheData#getParameters()
*/
@Override
public Map getParameters()
{
return parameters;
}
}