/*!
* 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;
import org.pentaho.reporting.libraries.base.config.Configuration;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
import org.pentaho.reporting.libraries.css.LibCssBoot;
import org.pentaho.reporting.libraries.css.selectors.CSSSelectorFactory;
import org.pentaho.reporting.libraries.css.selectors.conditions.CSSConditionFactory;
import org.w3c.css.sac.Parser;
import org.w3c.css.sac.helpers.ParserFactory;
/**
* 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 = LibCssBoot.getInstance().getGlobalConfig();
final String parserClass = config.getConfigProperty("org.pentaho.reporting.libraries.css.Parser");
if (parserClass != null)
{
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
{
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(e.getMessage(), e);
}
}
}