Package org.ajax4jsf.renderkit

Source Code of org.ajax4jsf.renderkit.LoadResourceRendererBase

/**
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library 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.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
*/

package org.ajax4jsf.renderkit;

import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;

import org.ajax4jsf.component.UIResource;
import org.ajax4jsf.renderkit.RendererUtils.HTML;
import org.ajax4jsf.resource.InternetResource;
import org.ajax4jsf.resource.InternetResourceBuilder;
import org.ajax4jsf.resource.ResourceRenderer;
import org.ajax4jsf.resource.URIInternetResource;

/**
* @author shura
*
*/
public class LoadResourceRendererBase extends RendererBase implements UserResourceRenderer2 {
 
  private static final String SCRIPT_COMPONENT_FAMILY="org.ajax4jsf.LoadScript";
  private static final String STYLE_COMPONENT_FAMILY="org.ajax4jsf.LoadStyle";

  /* (non-Javadoc)
   * @see org.ajax4jsf.renderkit.RendererBase#getComponentClass()
   */
  protected Class getComponentClass() {
    return UIResource.class;
  }
 
  public void encodeToHead(FacesContext context, UIComponent component) throws IOException {
    UIResource resource = (UIResource) component;
    Object src = resource.getSrc();
    if(null == src) {
      throw new FacesException("Source for resource is null for component "+resource.getClientId(context));
    }

    String family = resource.getFamily();
    ResourceRenderer renderer = null;
    InternetResource internetResource = null;
    Map<String, Object> attributes = Collections.EMPTY_MAP;
   
    if (SCRIPT_COMPONENT_FAMILY.equals(family)) {
      renderer = InternetResourceBuilder.getInstance().getScriptRenderer();
    } else if (STYLE_COMPONENT_FAMILY.equals(family)) {
      renderer = InternetResourceBuilder.getInstance().getStyleRenderer();
      String media = (String) resource.getAttributes().get(HTML.media_ATTRIBUTE);
      if (media != null && media.length() != 0) {
        attributes = new HashMap<String, Object>();
        attributes.put(HTML.media_ATTRIBUTE, media);
      }
    }
   
    if (src instanceof InternetResource) {
      internetResource = (InternetResource) src;
    } else {
      if(resource.isRendered()){
        String uri = context.getApplication().getViewHandler().
          getResourceURL(context, src.toString());
        uri = context.getExternalContext().encodeResourceURL(uri);
        internetResource = new URIInternetResource(uri);
      }
    }

    if (internetResource != null) {
      renderer.encode(internetResource, context, null, attributes);
    }
  }

}
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