/*
 * Copyright 2008 National Library of Sweden 
 * 
 * Licensed 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 
 * 
 * 	http://www.apache.org/licenses/LICENSE-2.0 
 *  
 * 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 se.kb.oai.pmh;

import java.util.LinkedList;

import org.dom4j.Document;
import org.dom4j.Node;

/**
 * Class that represents the response from a <code>ListIdentifiers</code> request.
 * You can use it to get a list of <code>Headers</code> that holds identifiers.
 *  
 * @author Oskar Grenholm, National Library of Sweden
 */
public class IdentifiersList extends ListBase<Header> {

    private static final String HEADER_XPATH = "oai:ListIdentifiers/oai:header";
    
    /**
     * Creates an <code>IdentifiersList</code> from the returned response.
     * 
     * @param document the response
     * @throws ErrorResponseException
     */
    public IdentifiersList(Document document) throws ErrorResponseException {
        super(document);

        super.list = new LinkedList<Header>();
        for(Node node : xpath.selectNodes(HEADER_XPATH)) {
            list.add(new Header(node));
        } 
    }
}