org.apache.myfaces.shared_tomahawk.el.SimpleActionMethodBinding Maven / Gradle / Ivy

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JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF2.1 features. A JSF2.1 implementation is required to use this version of the Tomahawk library.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.myfaces.shared_tomahawk.el;

import javax.faces.component.StateHolder;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.MethodBinding;
import javax.faces.el.MethodNotFoundException;

/**
 * Convenient method binding that does nothing other than returning a fixed outcome String when invoked.
 *
 * @author Manfred Geiler
 */
public class SimpleActionMethodBinding
        extends MethodBinding
        implements StateHolder
{
    private String _outcome;

    public SimpleActionMethodBinding(String outcome)
    {
        _outcome = outcome;
    }

    public Object invoke(FacesContext facescontext, Object aobj[]) throws EvaluationException, MethodNotFoundException
    {
        return _outcome;
    }

    public Class getType(FacesContext facescontext) throws MethodNotFoundException
    {
        return String.class;
    }


    //~ StateHolder support ----------------------------------------------------------------------------

    private boolean _transient = false;

    /**
     * Empty constructor, so that new instances can be created when restoring state.
     */
    public SimpleActionMethodBinding()
    {
        _outcome = null;
    }

    public Object saveState(FacesContext facescontext)
    {
        return _outcome;
    }

    public void restoreState(FacesContext facescontext, Object obj)
    {
        _outcome = (String)obj;
    }

    public boolean isTransient()
    {
        return _transient;
    }

    public void setTransient(boolean flag)
    {
        _transient = flag;
    }

    public String toString()
    {
        return _outcome;
    }
}