/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2009 Jaspersoft Corporation. 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 <http://www.gnu.org/licenses/>.
*/
package net.sf.jasperreports.engine.base;
import java.io.Serializable;
import java.util.StringTokenizer;
import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.JRExpressionChunk;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.util.JRClassLoader;
/**
* @author Teodor Danciu (teodord@users.sourceforge.net)
* @version $Id: JRBaseExpression.java 3033 2009-08-27 11:46:22Z teodord $
*/
public class JRBaseExpression implements JRExpression, Serializable
{
/**
*
*/
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
/**
*
*/
protected String valueClassName = null;
protected String valueClassRealName = null;
protected int id = 0;
protected transient Class valueClass = null;
/**
*
*/
private JRExpressionChunk[] chunks = null;
/**
*
*/
private static int lastId = 0;
/**
*
*/
protected JRBaseExpression()
{
}
/**
* Creates a copy of an expression.
*
* @param expression the original expression
* @param factory the base object factory
* @param expressionId if not null, the created expression will use it as ID
* instead of the original expressions's ID
*/
protected JRBaseExpression(JRExpression expression, JRBaseObjectFactory factory, Integer expressionId)
{
factory.put(expression, this);
valueClassName = expression.getValueClassName();
if (expressionId == null)
{
id = expression.getId();
}
else
{
id = expressionId.intValue();
}
/* */
JRExpressionChunk[] jrChunks = expression.getChunks();
if (jrChunks != null && jrChunks.length > 0)
{
chunks = new JRExpressionChunk[jrChunks.length];
for(int i = 0; i < chunks.length; i++)
{
chunks[i] = factory.getExpressionChunk(jrChunks[i]);
}
}
}
/**
* Creates a copy of an expression.
*
* @param expression the original expression
* @param factory the base object factory
*/
protected JRBaseExpression(JRExpression expression, JRBaseObjectFactory factory)
{
this(expression, factory, null);
}
/**
*
*/
private static synchronized int getNextId()
{
return lastId++;
}
/**
*
*/
public void regenerateId()
{
id = getNextId();
}
/**
*
*/
public Class getValueClass()
{
if (valueClass == null)
{
String className = getValueClassRealName();
if (className != null)
{
try
{
valueClass = JRClassLoader.loadClassForName(className);
}
catch(ClassNotFoundException e)
{
throw new JRRuntimeException(e);
}
}
}
return valueClass;
}
/**
*
*/
public String getValueClassName()
{
return valueClassName;
}
/**
*
*/
private String getValueClassRealName()
{
if (valueClassRealName == null)
{
valueClassRealName = JRClassLoader.getClassRealName(valueClassName);
}
return valueClassRealName;
}
/**
*
*/
public int getId()
{
return id;
}
/**
*
*/
public JRExpressionChunk[] getChunks()
{
return chunks;
}
/**
*
*/
public String getText()
{
String text = "";
chunks = getChunks();
if (chunks != null && chunks.length > 0)
{
StringBuffer sbuffer = new StringBuffer();
for(int i = 0; i < chunks.length; i++)
{
switch(chunks[i].getType())
{
case JRExpressionChunk.TYPE_PARAMETER :
{
sbuffer.append("$P{");
sbuffer.append( chunks[i].getText() );
sbuffer.append("}");
break;
}
case JRExpressionChunk.TYPE_FIELD :
{
sbuffer.append("$F{");
sbuffer.append( chunks[i].getText() );
sbuffer.append("}");
break;
}
case JRExpressionChunk.TYPE_VARIABLE :
{
sbuffer.append("$V{");
sbuffer.append( chunks[i].getText() );
sbuffer.append("}");
break;
}
case JRExpressionChunk.TYPE_RESOURCE :
{
sbuffer.append("$R{");
sbuffer.append( chunks[i].getText() );
sbuffer.append("}");
break;
}
case JRExpressionChunk.TYPE_TEXT :
default :
{
String textChunk = chunks[i].getText();
String escapedText = escapeTextChunk(textChunk);
sbuffer.append(escapedText);
break;
}
}
}
text = sbuffer.toString();
}
return text;
}
protected String escapeTextChunk(String text)
{
if (text == null || text.indexOf('$') < 0)
{
return text;
}
StringBuffer sb = new StringBuffer(text.length() + 4);
StringTokenizer tkzer = new StringTokenizer(text, "$", true);
boolean wasDelim = false;
while (tkzer.hasMoreElements())
{
String token = tkzer.nextToken();
if (wasDelim &&
(token.startsWith("P{") || token.startsWith("F{") || token.startsWith("V{") || token.startsWith("R{")) &&
token.indexOf('}') > 0)
{
sb.append('$');
}
sb.append(token);
wasDelim = token.equals("$");
}
return sb.toString();
}
/**
*
*/
public Object clone()
{
JRBaseExpression clone = null;
try
{
clone = (JRBaseExpression)super.clone();
}
catch (CloneNotSupportedException e)
{
throw new JRRuntimeException(e);
}
if (chunks != null)
{
clone.chunks = new JRExpressionChunk[chunks.length];
for(int i = 0; i < chunks.length; i++)
{
clone.chunks[i] = (JRExpressionChunk)chunks[i].clone();
}
}
return clone;
}
}