htmlinputhiddenrenderer.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 142 行

/*
 * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.jsf.html;

import java.io.*;
import java.util.*;

import javax.faces.*;
import javax.faces.component.*;
import javax.faces.component.html.*;
import javax.faces.context.*;
import javax.faces.render.*;

/**
 * The HTML input/hidden renderer
 */
class HtmlInputHiddenRenderer extends Renderer
{
  public static final Renderer RENDERER = new HtmlInputHiddenRenderer();

  /**
   * True if the renderer is responsible for rendering the children.
   */
  @Override
  public boolean getRendersChildren()
  {
    return false;
  }

  /**
   * Decodes the data from the form.
   */
  @Override
  public void decode(FacesContext context, UIComponent component)
  {
    String clientId = component.getClientId(context);

    ExternalContext ext = context.getExternalContext();
    Map<String,String> paramMap = ext.getRequestParameterMap();

    String value = paramMap.get(clientId);

    if (value != null)
      ((EditableValueHolder) component).setSubmittedValue(value);
  }
  
  /**
   * Renders the open tag for the text.
   */
  @Override
  public void encodeBegin(FacesContext context, UIComponent component)
    throws IOException
  {
    ResponseWriter out = context.getResponseWriter();

    String id = component.getId();
    
    if (component instanceof HtmlInputHidden) {
      HtmlInputHidden htmlInput = (HtmlInputHidden) component;
    }
    else {
      Map<String,Object> attrMap = component.getAttributes();
    }

    out.startElement("input", component);
    out.writeAttribute("type", "hidden", "type");

    out.writeAttribute("name", component.getClientId(context), "name");

    if (id != null && ! id.startsWith(UIViewRoot.UNIQUE_ID_PREFIX))
      out.writeAttribute("id", component.getClientId(context), "id");

    if (component instanceof HtmlInputHidden) {
      HtmlInputHidden htmlInput = (HtmlInputHidden) component;

      Object value = htmlInput.getValue();

      if (value != null)
        out.writeAttribute("value", String.valueOf(value), "value");
    }
    else {
      Map<String,Object> attrMap = component.getAttributes();

      Object value = attrMap.get("value");

      if (value != null)
        out.writeAttribute("value", String.valueOf(value), "value");
    }

    out.endElement("input");
  }

  /**
   * Renders the content for the component.
   */
  @Override
  public void encodeChildren(FacesContext context, UIComponent component)
    throws IOException
  {
  }

  /**
   * Renders the closing tag for the component.
   */
  @Override
  public void encodeEnd(FacesContext context, UIComponent component)
    throws IOException
  {
  }

  public String toString()
  {
    return "HtmlInputHiddenRenderer[]";
  }
}