impl/src/main/java/org/apache/myfaces/renderkit/html/HtmlHiddenRenderer.java

/*
 * 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.renderkit.html;

import java.io.IOException;

import javax.faces.component.UIComponent;
import javax.faces.component.UIInput;
import javax.faces.component.UIOutput;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.convert.ConverterException;

import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFRenderer;
import org.apache.myfaces.renderkit.html.util.JSFAttr;
import org.apache.myfaces.renderkit.RendererUtils;
import org.apache.myfaces.renderkit.html.util.HTML;
import org.apache.myfaces.renderkit.html.base.HtmlRenderer;
import org.apache.myfaces.renderkit.html.util.HtmlRendererUtils;

/**
 * 
 * @author Thomas Spiegl (latest modification by $Author$)
 * @author Anton Koinov
 * @version $Revision$ $Date$
 */
@JSFRenderer(renderKitId = "HTML_BASIC", family = "javax.faces.Input", type = "javax.faces.Hidden")
public class HtmlHiddenRenderer extends HtmlRenderer
{
    @Override
    public void encodeEnd(FacesContext facesContext, UIComponent uiComponent) throws IOException
    {
        RendererUtils.checkParamValidity(facesContext, uiComponent, UIInput.class);

        ResponseWriter writer = facesContext.getResponseWriter();

        writer.startElement(HTML.INPUT_ELEM, uiComponent);
        writer.writeAttribute(HTML.TYPE_ATTR, HTML.INPUT_TYPE_HIDDEN, null);

        String clientId = uiComponent.getClientId(facesContext);
        writer.writeAttribute(HTML.ID_ATTR, clientId, null);
        writer.writeAttribute(HTML.NAME_ATTR, clientId, null);

        String value = RendererUtils.getStringValue(facesContext, uiComponent);
        if (value != null)
        {
            writer.writeAttribute(HTML.VALUE_ATTR, value, JSFAttr.VALUE_ATTR);
        }

        writer.endElement(HTML.INPUT_ELEM);
    }

    @Override
    public Object getConvertedValue(FacesContext facesContext, UIComponent uiComponent, Object submittedValue)
        throws ConverterException
    {
        RendererUtils.checkParamValidity(facesContext, uiComponent, UIOutput.class);
        return RendererUtils.getConvertedUIOutputValue(facesContext, (UIOutput)uiComponent, submittedValue);
    }

    @Override
    public void decode(FacesContext facesContext, UIComponent component)
    {
        RendererUtils.checkParamValidity(facesContext, component, null);

        if (component instanceof UIInput)
        {
            HtmlRendererUtils.decodeUIInput(facesContext, component);
        }
        else
        {
            throw new IllegalArgumentException("Unsupported component class " + component.getClass().getName());
        }
    }

}