/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.kernel.plugins.dependency;
import java.util.HashMap;
import java.util.Map;
import org.jboss.kernel.api.dependency.Matcher;
import org.jboss.kernel.api.dependency.MatcherFactory;
import org.jboss.kernel.api.dependency.MatcherTransformer;
import org.jboss.logging.Logger;
import org.jboss.reflect.plugins.introspection.ReflectionUtils;
/**
* Default Matcher factory.
*
* @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
*/
public class DefaultMatcherFactory extends MatcherFactory implements MatcherTransformer
{
/** The log */
protected Logger log = Logger.getLogger(getClass());
/** The matcher transformers map */
private Map<String, MatcherTransformer> transfomers = new HashMap<String, MatcherTransformer>();
public DefaultMatcherFactory()
{
addMatcherTransfomer("default", this);
addMatcherTransfomer("regexp", new RegexpMatcherTransformer());
addMatcherTransfomer("interval", new IntervalMatcherTransformer());
}
public void addMatcherTransfomer(String key, MatcherTransformer transformer)
{
if (key == null && transformer != null)
transfomers.put(transformer.getClass().getName(), transformer);
if (key != null)
{
if (transformer == null)
transfomers.remove(key);
else
transfomers.put(key, transformer);
}
}
/**
* Create the Matcher.
*
* @param transformer the transformer
* @param value the value to wrap
* @return new Matcher instance
*/
public Matcher createMatcher(String transformer, Object value)
{
if (value instanceof Matcher)
return (Matcher)value;
if (transformer == null)
transformer = "default";
MatcherTransformer mt = transfomers.get(transformer);
if (mt != null)
return mt.transform(value);
if (log.isTraceEnabled())
log.trace("No matching transfomer key '" + transformer + "', trying to instantiate new.");
try
{
mt = (MatcherTransformer)ReflectionUtils.newInstance(transformer);
return mt.transform(value);
}
catch(Throwable t)
{
throw new IllegalArgumentException("Cannot create Matcher instance: " + t);
}
}
public Matcher transform(Object value)
{
return new DefaultMatcher(value);
}
}