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// Copyright (c) 1998, 2007, Oracle. All rights reserved.  
package oracle.toplink.essentials.internal.parsing.ejbql;

import oracle.toplink.essentials.internal.queryframework.*;
import oracle.toplink.essentials.exceptions.*;
import oracle.toplink.essentials.queryframework.*;
import oracle.toplink.essentials.internal.sessions.AbstractSession;

/**
 * INTERNAL
 * 

Purpose: * Mechanism used for EJBQL. *

*

Responsibilities: * Executes the appropriate call. * * @author Jon Driscoll, Joel Lucuik * @since TopLink 4.0 */ public class EJBQLCallQueryMechanism extends ExpressionQueryMechanism { //EJBQLCall gets its own variable, rather than inheriting //call (because an EJBQLCall is out on its own) protected EJBQLCall ejbqlCall; /** * Initialize the state of the query * @param query - owner of mechanism */ public EJBQLCallQueryMechanism(DatabaseQuery query) { super(query); } /** * INTERNAL * Initialize the state of the query * @param query - owner of mechanism * @param call - Database call */ public EJBQLCallQueryMechanism(DatabaseQuery query, EJBQLCall call) { this(query); this.ejbqlCall = call; call.setQuery(query); } public Object clone() { EJBQLCallQueryMechanism copyOfMyself = (EJBQLCallQueryMechanism)super.clone(); copyOfMyself.ejbqlCall = (EJBQLCall)ejbqlCall.clone(); return copyOfMyself; } /** * Internal: * In the case of EJBQL, an expression needs to be generated, and the query populated. */ public void buildSelectionCriteria(AbstractSession newSession) { getEJBQLCall().setQuery(getQuery()); getEJBQLCall().populateQuery(newSession); } public EJBQLCall getEJBQLCall() { return ejbqlCall; } public boolean isEJBQLCallQueryMechanism() { return true; } /** * All the query mechanism related things are initialized here. * This method is called on the *clone* of the query with * every execution. */ public void prepareForExecution() throws QueryException { } public void setEJBQLCall(EJBQLCall newEJBQLCall) { ejbqlCall = newEJBQLCall; } }





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