/*
* JBoss, Home of Professional Open Source
* Copyright 2005, 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.aop.metadata;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Iterator;
import org.jboss.aop.Advisor;
import org.jboss.aop.pointcut.Util;
import org.jboss.aop.pointcut.ast.ClassExpression;
import javassist.CtClass;
import javassist.NotFoundException;
/**
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 70500 $
*/
public abstract class ClassMetaDataBinding
{
protected ClassExpression classExpr;
protected String expr;
protected String name;
protected String tag;
protected ArrayList<WeakReference<Advisor>> advisors = new ArrayList<WeakReference<Advisor>>();
protected ClassMetaDataLoader loader;
public ClassMetaDataBinding(ClassMetaDataLoader loader, String name, String tag, String exp)
{
this.name = name;
this.tag = tag;
this.loader = loader;
expr = exp;
this.classExpr = new ClassExpression(expr);
}
public ClassMetaDataLoader getLoader()
{
return loader;
}
public String getName()
{
return name;
}
public String getTag()
{
return tag;
}
public void addAdvisor(Advisor advisor)
{
// Don't hold a direct reference to an advisor because of undeploy and redeploy. Use WeakRefrences because
// we may be having in the future an Advisor per instance.
synchronized (advisors)
{
Iterator<WeakReference<Advisor>> it = advisors.iterator();
while (it.hasNext())
{
WeakReference<Advisor> ref = it.next();
Advisor adv = ref.get();
if (adv == null) it.remove();
}
advisors.add(new WeakReference<Advisor>(advisor));
}
advisor.addClassMetaData(this);
}
public void clearAdvisors()
{
synchronized (advisors)
{
for (int i = 0; i < advisors.size(); i++)
{
WeakReference<Advisor> ref = advisors.get(i);
Advisor advisor = ref.get();
if (advisor != null)
advisor.removeClassMetaData(this);
}
advisors.clear();
}
}
public boolean equals(Object obj)
{
if (obj == this) return true;
if (!(obj instanceof ClassMetaDataBinding)) return false;
return ((ClassMetaDataBinding) obj).getName().equals(name);
}
public int hashCode()
{
return name.hashCode();
}
public boolean matches(Advisor advisor, Class<?> clazz)
{
return Util.matchesClassExpr(classExpr, clazz, advisor);
}
public boolean matches(Advisor advisor, CtClass clazz) throws NotFoundException
{
return Util.matchesClassExpr(classExpr, clazz, advisor);
}
public String getClassExpr()
{
return expr;
}
}