/**
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
 *    statements and notices.  Redistributions must also contain a
 *    copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions and the
 *    following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. The name "Exolab" must not be used to endorse or promote
 *    products derived from this Software without prior written
 *    permission of Exoffice Technologies.  For written permission,
 *    please contact info@exolab.org.
 *
 * 4. Products derived from this Software may not be called "Exolab"
 *    nor may "Exolab" appear in their names without prior written
 *    permission of Exoffice Technologies. Exolab is a registered
 *    trademark of Exoffice Technologies.
 *
 * 5. Due credit should be given to the Exolab Project
 *    (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 1999 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: ENCReference.java,v 1.7 2002/03/14 03:06:58 dblevins Exp $
 */
package org.openejb.core.ivm.naming;

import org.openejb.core.ivm.naming.Reference;
import javax.naming.NameNotFoundException;
import org.openejb.core.ThreadContext;
import org.openejb.core.Operations;
import javax.naming.Context;

/*
  This class is a wrapper for an Intra-VM EJB or Connector references in the 
  JNDI ENC of a entity, stateful and stateless beans.  When the getObject( ) method is invoked the 
  Operation is checked to ensure that its is allowed for the bean's current state.
  
  This class is subclassed by ENCReference in the entity, stateful and stateless packages 
  of org.openejb.core.
*/
public abstract class ENCReference implements Reference{
    
    protected Reference ref = null;
    protected boolean checking = true;
    
    /**
     */
    public ENCReference(Reference ref){
        this.ref = ref;
    }

    public void setChecking( boolean value ) {
	checking = value;
    }
    
    /*
    * Obtains the referenced object.
    */
    public Object getObject( ) throws javax.naming.NamingException{
        if( ThreadContext.isValid() ){
            ThreadContext cntx = ThreadContext.getThreadContext();
            byte operation = cntx.getCurrentOperation();
            checkOperation(operation);
        }
        return ref.getObject();
    }
    
    public abstract void checkOperation(byte opertionType) throws NameNotFoundException;
}
