HtmlHiddenRenderer.java

/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * Licensed 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 org.apache.myfaces.shared_impl.renderkit.JSFAttr;
import org.apache.myfaces.shared_impl.renderkit.RendererUtils;
import org.apache.myfaces.shared_impl.renderkit.html.HTML;
import org.apache.myfaces.shared_impl.renderkit.html.HtmlRenderer;
import org.apache.myfaces.shared_impl.renderkit.html.HtmlRendererUtils;

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 java.io.IOException;


/**
 * @author Thomas Spiegl (latest modification by $Author$)
 * @author Anton Koinov
 * @version $Revision$ $Date$
 */
public class HtmlHiddenRenderer
extends HtmlRenderer
{
    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);
    }

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


    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());
         }
     }

}