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Apache XML Security for Java supports XML-Signature Syntax and Processing, W3C Recommendation 12 February 2002, and XML Encryption Syntax and Processing, W3C Recommendation 10 December 2002. As of version 1.4, the library supports the standard Java API JSR-105: XML Digital Signature APIs.

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/**
 * 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 org.apache.xml.security.utils;

import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;


/**
 * Purpose of this class is to enable the XML Parser to keep track of ID
 * attributes. This is done by 'registering' attributes of type ID at the
 * IdResolver.
 * @deprecated
 */
public class IdResolver {

    private IdResolver() {
        // we don't allow instantiation
    }

    /**
     * Method registerElementById
     *
     * @param element the element to register
     * @param id the ID attribute
     */
    public static void registerElementById(Element element, Attr id) {
        element.setIdAttributeNode(id, true);
    }

    /**
     * Method getElementById
     *
     * @param doc the document
     * @param id the value of the ID 
     * @return the element obtained by the id, or null if it is not found.
     */
    public static Element getElementById(Document doc, String id) {
        return doc.getElementById(id);
    }

}