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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 JSF1.2 features. A JSF1.2 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.document;

import java.io.IOException;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;

import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;

/**
 * Base class to handle the document family
 *
 * @author Mario Ivankovits (latest modification by $Author: skitching $)
 * @version $Revision: 673833 $ $Date: 2008-07-03 16:58:05 -0500 (Thu, 03 Jul 2008) $
 */
public abstract class AbstractDocumentRenderer extends Renderer
{
    protected abstract String getHtmlTag();
    protected abstract Class getDocumentClass();

    public void encodeBegin(FacesContext facesContext, UIComponent uiComponent)
            throws IOException
    {
        RendererUtils.checkParamValidity(facesContext, uiComponent,
                getDocumentClass());

        AbstractDocument document = (AbstractDocument) uiComponent;

        ResponseWriter writer = facesContext.getResponseWriter();

        if (document.hasState() && document.isEndState())
        {
            closeTag(facesContext, writer);
        }
        else
        {
            openTag(writer, uiComponent);
        }
    }

    protected void openTag(ResponseWriter writer, UIComponent uiComponent)
        throws IOException
    {
        writer.startElement(getHtmlTag(), uiComponent);
    }

    protected void closeTag(FacesContext facesContext, ResponseWriter writer)
        throws IOException
    {
        writeBeforeEnd(facesContext);
        writer.endElement(getHtmlTag());
    }

    public void encodeEnd(FacesContext facesContext, UIComponent uiComponent)
            throws IOException
    {
        AbstractDocument document = (AbstractDocument) uiComponent;

        ResponseWriter writer = facesContext.getResponseWriter();

        if (!document.hasState())
        {
            closeTag(facesContext, writer);
        }
    }

    protected void writeBeforeEnd(FacesContext facesContext) throws IOException
    {
    }
}