/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.util.beans;
import org.pentaho.reporting.engine.classic.core.util.PropertyLookupParser;
import org.pentaho.reporting.libraries.base.util.CSVTokenizer;
/**
* Todo: Analyze this class; it might not do what it promises ..
*/
public abstract class BeanPropertyLookupParser extends PropertyLookupParser
{
protected BeanPropertyLookupParser()
{
}
/**
* @param name
* @return
*/
protected abstract Object performInitialLookup(String name);
protected String lookupVariable(final String entity)
{
// first, split the entity into separate strings (separator is '.').
final CSVTokenizer tokenizer = new CSVTokenizer(entity, ".");
if (tokenizer.hasMoreTokens())
{
final String name = tokenizer.nextToken();
final Object base = performInitialLookup(name);
try
{
if (tokenizer.hasMoreTokens())
{
return BeanPropertyLookupParser.continueLookupVariable(tokenizer, base);
}
else
{
return ConverterRegistry.toAttributeValue(base);
}
}
catch (BeanException e)
{
return entity;
}
}
return entity;
}
private static String continueLookupVariable(final CSVTokenizer tokenizer,
final Object parent)
throws BeanException
{
if (tokenizer.hasMoreTokens())
{
final String name = tokenizer.nextToken();
final Object base = ConverterRegistry.toPropertyValue(name, parent.getClass());
if (tokenizer.hasMoreTokens())
{
return continueLookupVariable(tokenizer, base);
}
else
{
return ConverterRegistry.toAttributeValue(base);
}
}
return null;
}
}