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/*
 * $Id: MockVariableResolver.java,v 1.1 2005/10/18 17:48:06 edburns Exp $
 */

/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the License). You may not use this file except in
 * compliance with the License.
 * 
 * You can obtain a copy of the License at
 * https://javaserverfaces.dev.java.net/CDDL.html or
 * legal/CDDLv1.0.txt. 
 * See the License for the specific language governing
 * permission and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL
 * Header Notice in each file and include the License file
 * at legal/CDDLv1.0.txt.    
 * If applicable, add the following below the CDDL Header,
 * with the fields enclosed by brackets [] replaced by
 * your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 * 
 * [Name of File] [ver.__] [Date]
 * 
 * Copyright 2005 Sun Microsystems Inc. All Rights Reserved
 */

package com.sun.faces.mock;


import java.util.Map;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.el.VariableResolver;


/**
 * 

Mock implementation of {@link VariableResolver} that supports a limited * subset of expression evaluation functionality:

*
    *
  • Recognizes applicationScope, requestScope, * and sessionScope implicit names.
  • *
  • Searches in ascending scopes for non-reserved names.
  • *
*/ public class MockVariableResolver extends VariableResolver { // ------------------------------------------------------------ Constructors // ------------------------------------------------ VariableResolver Methods public Object resolveVariable(FacesContext context, String name) { if ((context == null) || (name == null)) { throw new NullPointerException(); } // Handle predefined variables if ("applicationScope".equals(name)) { return (econtext().getApplicationMap()); } else if ("requestScope".equals(name)) { return (econtext().getRequestMap()); } else if ("sessionScope".equals(name)) { return (econtext().getSessionMap()); } // Look up in ascending scopes Map map = null; map = econtext().getRequestMap(); if (map.containsKey(name)) { return (map.get(name)); } map = econtext().getSessionMap(); if ((map != null) && (map.containsKey(name))) { return (map.get(name)); } map = econtext().getApplicationMap(); if (map.containsKey(name)) { return (map.get(name)); } // Requested object is not found return (null); } // --------------------------------------------------------- Private Methods private ExternalContext econtext() { return (FacesContext.getCurrentInstance().getExternalContext()); } }




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