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/**
* ===========================================
* LibLayout : a free Java layouting library
* ===========================================
*
* Project Info: http://reporting.pentaho.org/liblayout/
*
* (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: CSSParserFactory.java 6489 2008-11-28 14:53:40Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.input.style.parser;
import org.jfree.layouting.LibLayoutBoot;
import org.jfree.layouting.input.style.selectors.CSSSelectorFactory;
import org.jfree.layouting.input.style.selectors.conditions.CSSConditionFactory;
import org.w3c.css.sac.Parser;
import org.w3c.css.sac.helpers.ParserFactory;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
import org.pentaho.reporting.libraries.base.config.Configuration;
/**
* Creates a new CSS parser by first looking for a specified parser in the
* libLayout configuration and if that fails, by using the W3C parser factory.
*
* @author Thomas Morgner
*/
public class CSSParserFactory
{
private static CSSParserFactory parserFactory;
public static synchronized CSSParserFactory getInstance()
{
if (parserFactory == null)
{
parserFactory = new CSSParserFactory();
}
return parserFactory;
}
private CSSParserFactory()
{
}
public Parser createCSSParser ()
throws CSSParserInstantiationException
{
final Configuration config = LibLayoutBoot.getInstance().getGlobalConfig();
final String parserClass =
config.getConfigProperty("org.jfree.layouting.css.Parser");
if (parserClass != null)
{
final Parser p = (Parser) ObjectUtilities.loadAndInstantiate
(parserClass, CSSParserFactory.class, Parser.class);
if (p != null)
{
p.setConditionFactory(new FixNamespaceConditionFactory(new CSSConditionFactory()));
p.setSelectorFactory(new FixNamespaceSelectorFactory(new CSSSelectorFactory()));
return p;
}
}
try
{
final Parser p = new ParserFactory().makeParser();
if (p == null)
{
return null;
}
p.setConditionFactory(new FixNamespaceConditionFactory(new CSSConditionFactory()));
p.setSelectorFactory(new FixNamespaceSelectorFactory(new CSSSelectorFactory()));
return p;
}
catch (Exception e)
{
throw new CSSParserInstantiationException();
}
}
}
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