CallbackLookup.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF 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
 *
 * 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 de.kp.wsclient.security;

import java.util.List;
import org.w3c.dom.Element;

/**
 * This interface defines a pluggable way of locating Elements that are referenced via an Id.
 */
public interface CallbackLookup {

    /**
     * Get the DOM element that corresponds to the given id and ValueType reference. The Id can 
     * be a wsu:Id or else an Id attribute, or a SAML Id when the ValueType refers to a SAML
     * Assertion.
     * @param id The id of the element to locate
     * @param valueType The ValueType attribute of the element to locate (can be null)
     * @param checkMultipleElements If true then go through the entire tree and return 
     *        null if there are multiple elements with the same Id
     * @return the located element
     * @throws WSSecurityException
     */
    public Element getElement(String id, String valueType, boolean checkMultipleElements) throws Exception;
    
    /**
     * Get the DOM element(s) that correspond to the given localname/namespace. 
     * @param localname The localname of the Element(s)
     * @param namespace The namespace of the Element(s)
     * @return the located element(s)
     * @throws WSSecurityException
     */
    public List<Element> getElements(String localname, String namespace) throws Exception;
    
}