/*
* 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.advice;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.WeakHashMap;
import org.jboss.aop.Advisor;
import org.jboss.aop.AspectManager;
import org.jboss.aop.pointcut.Pointcut;
import org.jboss.aop.pointcut.PointcutExpression;
import org.jboss.aop.pointcut.ast.ASTCFlowExpression;
import org.jboss.aop.pointcut.ast.ParseException;
import org.jboss.aop.pointcut.ast.PointcutExpressionParser;
import org.jboss.aop.util.logging.AOPLogger;
import org.jboss.logging.Logger;
/**
* Comment
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 63047 $
*/
public class AdviceBinding
{
private static final Logger logger = AOPLogger.getLogger(AdviceBinding.class);
private static volatile long counter = 0;
protected String name;
protected Pointcut pointcut;
protected ASTCFlowExpression cflow;
protected String cflowString;
// not list because of redundancy caused by successive calls of ClassAdvisor.rebuildInterceptors
protected Map advisors = new WeakHashMap();
protected InterceptorFactory[] interceptorFactories = new InterceptorFactory[0];
public AdviceBinding() {}
public AdviceBinding(String name, Pointcut p, ASTCFlowExpression cflow, String cflowString, InterceptorFactory[] factories) throws ParseException
{
this.name = name;
interceptorFactories = factories;
this.cflow = cflow;
pointcut = p;
this.cflowString = cflowString;
}
/**
* This constructor is used for creation of AdviceBinding programmatically
*
* @param pointcutExpression
* @param cflow
* @throws ParseException
*/
public AdviceBinding(String pointcutExpression, String cflow) throws ParseException
{
this(Long.toString(System.currentTimeMillis()) + ":" + Long.toString(counter++), pointcutExpression, cflow);
}
/**
* This constructor is used for creation of AdviceBinding programmatically
*
* @param pointcutExpression
* @param cflow
* @throws ParseException
*/
public AdviceBinding(String name, String pointcutExpression, String cflow) throws ParseException
{
this.name = name;
setPointcutExpression(pointcutExpression);
setCFlowExpression(cflow);
interceptorFactories = new InterceptorFactory[0];
}
public void setCFlowExpression(String cflow)
throws ParseException
{
if (cflow != null)
{
cflowString = cflow;
this.cflow = new PointcutExpressionParser(new StringReader(cflowString)).CFlowExpression();
}
}
public void setPointcutExpression(String pointcutExpression)
throws ParseException
{
pointcut = new PointcutExpression(Long.toString(System.currentTimeMillis()) + ":" + Long.toString(counter++), pointcutExpression);
}
public void addInterceptorFactory(InterceptorFactory factory)
{
List list = Arrays.asList(interceptorFactories);
list = new ArrayList(list);
list.add(factory);
interceptorFactories = (InterceptorFactory[]) list.toArray(new InterceptorFactory[list.size()]);
}
/**
* Add an interceptor to chain. This is an actual class
* that implements Interceptor. A GenericInterceptorFactory will
* be created to wrap the class.
*
* @param clazz
*/
public void addInterceptor(Class clazz)
{
addInterceptorFactory(new GenericInterceptorFactory(clazz));
}
public String getName()
{
return name;
}
public InterceptorFactory[] getInterceptorFactories()
{
return interceptorFactories;
}
public void setName(String name)
{
this.name = name;
}
public void addAdvisor(Advisor advisor)
{
if (AspectManager.verbose && logger.isDebugEnabled()) logger.debug("added advisor: " + advisor.getName() + " from binding: " + name);
// 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)
{
advisors.put(advisor, Boolean.TRUE);
}
}
public boolean hasAdvisors()
{
return advisors.size() > 0;
}
public ArrayList getAdvisors()
{
ArrayList list = new ArrayList(advisors.size());
synchronized (advisors)
{
list.addAll(advisors.keySet());
}
return list;
}
public void clearAdvisors()
{
synchronized (advisors)
{
for (Iterator it = advisors.keySet().iterator(); it.hasNext();)
{
Advisor advisor = (Advisor) it.next();
if (advisor.getManager().isAdvisorRegistered(advisor))
{
advisor.removeAdviceBinding(this);
}
}
advisors.clear();
}
}
public boolean equals(Object obj)
{
if (obj == this) return true;
if (!(obj instanceof AdviceBinding)) return false;
return ((AdviceBinding) obj).getName().equals(name);
}
public int hashCode()
{
return name.hashCode();
}
public Pointcut getPointcut()
{
return pointcut;
}
public ASTCFlowExpression getCFlow()
{
return cflow;
}
public String getCFlowString()
{
return cflowString;
}
}