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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.
 */
/*
 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
 */
/*
 * $Id: DOMXSLTTransform.java 1667527 2015-03-18 12:54:20Z mullan $
 */
package org.apache.jcp.xml.dsig.internal.dom;

import java.security.InvalidAlgorithmParameterException;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

import javax.xml.crypto.*;
import javax.xml.crypto.dsig.spec.TransformParameterSpec;
import javax.xml.crypto.dsig.spec.XSLTTransformParameterSpec;

/**
 * DOM-based implementation of XSLT Transform.
 * (Uses Apache XML-Sec Transform implementation)
 *
 * @author Sean Mullan
 */
public final class DOMXSLTTransform extends ApacheTransform {
 
    @Override
    public void init(TransformParameterSpec params)
        throws InvalidAlgorithmParameterException {
        if (params == null) {
            throw new InvalidAlgorithmParameterException("params are required");
        }
        if (!(params instanceof XSLTTransformParameterSpec)) {
            throw new InvalidAlgorithmParameterException("unrecognized params");
        }
        this.params = params;
    }

    @Override
    public void init(XMLStructure parent, XMLCryptoContext context)
        throws InvalidAlgorithmParameterException {

        super.init(parent, context);
        unmarshalParams(DOMUtils.getFirstChildElement(transformElem));
    }

    private void unmarshalParams(Element sheet) {
        this.params = new XSLTTransformParameterSpec
            (new javax.xml.crypto.dom.DOMStructure(sheet));
    }

    @Override
    public void marshalParams(XMLStructure parent, XMLCryptoContext context)
        throws MarshalException {
        super.marshalParams(parent, context);
        XSLTTransformParameterSpec xp =
            (XSLTTransformParameterSpec) getParameterSpec();
        Node xsltElem =
            ((javax.xml.crypto.dom.DOMStructure) xp.getStylesheet()).getNode();
        DOMUtils.appendChild(transformElem, xsltElem);
    }
}