/*!
* 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) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.libraries.css.parser.stylehandler;
import java.util.ArrayList;
import org.pentaho.reporting.libraries.css.model.StyleKey;
import org.pentaho.reporting.libraries.css.parser.CSSValueFactory;
import org.pentaho.reporting.libraries.css.parser.CSSValueReadHandler;
import org.pentaho.reporting.libraries.css.values.CSSValue;
import org.pentaho.reporting.libraries.css.values.CSSValueList;
import org.pentaho.reporting.libraries.css.values.CSSValuePair;
import org.w3c.css.sac.LexicalUnit;
/**
* Creation-Date: 26.11.2005, 19:23:09
*
* @author Thomas Morgner
*/
public abstract class ListOfPairReadHandler implements CSSValueReadHandler
{
protected ListOfPairReadHandler()
{
}
public synchronized CSSValue createValue(StyleKey name, LexicalUnit value)
{
ArrayList values = new ArrayList();
while (value != null)
{
final CSSValue firstPosition = parseFirstPosition(value);
if (firstPosition == null)
{
return null;
}
value = value.getNextLexicalUnit();
final CSSValue secondPosition = parseSecondPosition(value, firstPosition);
if (secondPosition == null)
{
return null;
}
addToResultList(values, firstPosition, secondPosition);
value = CSSValueFactory.parseComma(value);
}
return new CSSValueList(values);
}
protected void addToResultList(ArrayList values,
CSSValue firstPosition,
CSSValue secondPosition)
{
values.add(new CSSValuePair(firstPosition, secondPosition));
}
protected abstract CSSValue parseFirstPosition(final LexicalUnit value);
protected abstract CSSValue parseSecondPosition(final LexicalUnit value,
final CSSValue first);
}