SubscribedTabEvaluatorFactory.java

/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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.apereo.portal.layout.dlm.providers;

import org.apereo.portal.layout.dlm.Evaluator;
import org.apereo.portal.layout.dlm.EvaluatorFactory;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

/**
 * SubscribedTabEvaluatorFactory serves as the EvaluatorFactory implementation for
 * SubscribedTabEvaluators. This evalutator factory does not recognize any child elements. The
 * factory will automatically configure evaluators using the ownerID attribute associated with the
 * parent element fragmentDefinition element.
 *
 */
public class SubscribedTabEvaluatorFactory implements EvaluatorFactory {

    /*
     * (non-Javadoc)
     * @see org.apereo.portal.layout.dlm.EvaluatorFactory#getEvaluator(org.w3c.dom.Node)
     */
    public Evaluator getEvaluator(Node audience) {

        // use the ownerID associated with the parent element
        Node parent = audience.getParentNode();
        NamedNodeMap attributes = parent.getAttributes();
        Node owner = attributes.getNamedItem("ownerID");

        String ownerId = owner.getNodeValue();
        return new SubscribedTabEvaluator(ownerId);
    }
}