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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
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 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
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package com.sun.ejb.containers.interceptors;

import java.lang.reflect.Method;
import javax.interceptor.InvocationContext;
import javax.ejb.EJBContext;

import com.sun.ejb.EJBUtils;
import com.sun.ejb.Invocation.InterceptorChain;
import com.sun.ejb.containers.EJBContextImpl;

import java.util.Map;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;


/**
 * Concrete InvocationContext implementation passed to callback methods 
 * defined in interceptor classes.
 */
public class CallbackInvocationContext implements InvocationContext {

    private EJBContextImpl ejbContext;
    private Map contextData;
    private int callbackIndex = 0;
    private CallbackChainImpl callbackChain;

    public CallbackInvocationContext(EJBContextImpl ejbContextImpl,
                                     CallbackChainImpl chain) {
        ejbContext = ejbContextImpl;
        callbackChain = chain;
    }

    public Object getTarget() {
        return ejbContext.getEJB();
    }

    public Method getMethod() {
        return null;
    }
    
    public Object[] getParameters() {
        throw new IllegalStateException("not applicable to Callback methods");
    }

    public void setParameters(Object[] params) {
        throw new IllegalStateException("not applicable to Callback methods");
    }

    public EJBContext getEJBContext() {
        return ejbContext;
    }

    public Map<String, Object> getContextData() {
        if( contextData == null ) {
            contextData = new HashMap();
        }

        return contextData;
    }
    
    public Object proceed() throws Exception {
        try {
            callbackIndex++;
            return callbackChain.invokeNext(callbackIndex, this);
        } catch (Exception ex) {
            throw ex;
        } catch (Throwable th) {
            throw new Exception(th);
        }
    }

}