alfresco-community-repo/source/java/org/alfresco/web/config/AspectEvaluator.java

/*
 * Copyright (C) 2005 Alfresco, Inc.
 *
 * Licensed under the Mozilla Public License version 1.1 
 * with a permitted attribution clause. You may obtain a
 * copy of the License at
 *
 *   http://www.alfresco.org/legal/license.txt
 *
 * 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.alfresco.web.config;

import javax.faces.context.FacesContext;

import org.alfresco.config.evaluator.Evaluator;
import org.alfresco.service.cmr.dictionary.DictionaryService;
import org.alfresco.service.namespace.QName;
import org.alfresco.web.bean.repository.Node;
import org.alfresco.web.bean.repository.Repository;

/**
 * Evaluator that determines whether a given object has a particular aspect applied
 * 
 * @author gavinc
 */
public final class AspectEvaluator implements Evaluator
{
   /**
    * Determines whether the given aspect is applied to the given object
    * 
    * @see org.alfresco.config.evaluator.Evaluator#applies(java.lang.Object, java.lang.String)
    */
   public boolean applies(Object obj, String condition)
   {
      if (obj instanceof Node)
      {
         DictionaryService dd = Repository.getServiceRegistry(FacesContext.getCurrentInstance()).getDictionaryService();
         QName aspectQName = Repository.resolveToQName(condition);
         for (QName aspect : ((Node)obj).getAspects())
         {
            if (dd.isSubClass(aspect, aspectQName) == true)
            {
                return true;
            }
         }
      }
      
      return false;
   }
}