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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.custom.aliasbean;

import javax.el.ValueExpression;
import javax.faces.component.UIComponent;
import javax.faces.webapp.UIComponentELTag;
import javax.servlet.jsp.JspException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author Sylvain Vieujot (latest modification by $Author: lu4242 $)
 * @version $Revision: 664402 $ $Date: 2008-06-07 16:59:02 -0500 (Sat, 07 Jun 2008) $
 */
public class AliasBeanTag extends UIComponentELTag
{

    private Log log = LogFactory.getLog(AliasBeanTag.class);
    /**
     * Construct an instance of the AliasBeanELTag.
     */
    public AliasBeanTag()
    {
    }
    
    public int doStartTag() throws JspException
    {
        int retVal= super.doStartTag();

        UIComponent comp = getComponentInstance();

        if(comp instanceof AliasBean)
        {
            ((AliasBean) comp).makeAlias(getFacesContext());
        }
        else
        {
            log.warn("associated component is no aliasBean");
        }

        return retVal;
    }

    public int doEndTag() throws JspException
    {
        UIComponent comp = getComponentInstance();

        if(comp instanceof AliasBean)
        {
            ((AliasBean) comp).removeAlias(getFacesContext());
        }
        else
        {
            log.warn("associated component is no aliasBean");
        }

        return super.doEndTag();
    }
    
    @Override
    public String getComponentType()
    {
        return "org.apache.myfaces.AliasBean";
    }

    public String getRendererType()
    {
        return null;
    }

    private ValueExpression _alias;

    public void setAlias(ValueExpression alias)
    {
        _alias = alias;
    }

    private ValueExpression _value;

    public void setValue(ValueExpression value)
    {
        _value = value;
    }

    @Override
    protected void setProperties(UIComponent component)
    {
        if (!(component instanceof AliasBean))
        {
            throw new IllegalArgumentException("Component "
                    + component.getClass().getName() + " is no AliasBean");
        }
        AliasBean comp = (AliasBean) component;

        super.setProperties(component);

        if (_alias != null)
        {
            comp.setValueExpression("alias", _alias);
        }
        if (_value != null)
        {
            comp.setValueExpression("value", _value);
        }
    }

    @Override
    public void release()
    {
        super.release();
        _alias = null;
        _value = null;
    }
}