uicomponenteltag.java

RESIN 3.2 最新源码

/*
 * 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 javax.faces.webapp;

import java.io.*;

import javax.el.*;

import javax.faces.application.*;
import javax.faces.component.*;
import javax.faces.context.*;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

public abstract class UIComponentELTag extends UIComponentClassicTagBase
  implements Tag
{
  private ValueExpression _binding;
  private ValueExpression _rendered;
  
  public void setBinding(ValueExpression binding)
    throws JspException
  {
    _binding = binding;
  }

  protected boolean hasBinding()
  {
    return _binding != null;
  }

  public void setRendered(ValueExpression rendered)
  {
    _rendered = rendered;
  }

  protected ELContext getELContext()
  {
    return getFacesContext().getELContext();
  }

  protected void setProperties(UIComponent component)
  {
    if (_binding != null)
      component.setValueExpression("binding", _binding);
    
    if (_rendered != null)
      component.setValueExpression("rendered", _rendered);

    String type = getRendererType();
    if (type != null)
      component.setRendererType(type);
  }

  @Override
  protected UIComponent createComponent(FacesContext context,
					String newId)
    throws JspException
  {
    Application app = context.getApplication();

    UIComponent component;

    if (_binding != null) {
      component = app.createComponent(_binding, context, getComponentType());
      component.setValueExpression("binding", _binding);
    }
    else
      component = app.createComponent(getComponentType());

    component.setId(getId());

    setProperties(component);

    return component;
  }
}