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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.stax.ext;

import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;

import javax.xml.namespace.QName;

/**
 * Class to describe which and how an element must be secured
 *
 */
public class SecurePart {

    public enum Modifier {
        Element("http://www.w3.org/2001/04/xmlenc#Element"),
        Content("http://www.w3.org/2001/04/xmlenc#Content");

        private final String modifier;

        Modifier(String modifier) {
            this.modifier = modifier;
        }

        public String getModifier() {
            return this.modifier;
        }

        private static final Map modifierMap = new HashMap<>();

        static {
            for (Modifier modifier : EnumSet.allOf(Modifier.class)) {
                modifierMap.put(modifier.getModifier(), modifier);
            }
        }

        public static Modifier getModifier(String modifier) {
            return modifierMap.get(modifier);
        }
    }

    private QName name;
    private boolean generateXPointer;
    private Modifier modifier;
    private String idToSecure;
    private String externalReference;
    private String[] transforms;
    private String digestMethod;
    private boolean required = true;
    private boolean secureEntireRequest;

    public SecurePart(Modifier modifier) {
        this(null, false, modifier);
    }

    public SecurePart(QName name, Modifier modifier) {
        this(name, false, modifier);
    }

    public SecurePart(QName name, Modifier modifier, String[] transforms, String digestMethod) {
        this(name, false, modifier, transforms, digestMethod);
    }

    public SecurePart(QName name, boolean generateXPointer, Modifier modifier) {
        this.name = name;
        this.generateXPointer = generateXPointer;
        this.modifier = modifier;
    }

    public SecurePart(QName name, boolean generateXPointer, Modifier modifier, String[] transforms, String digestMethod) {
        this.name = name;
        this.generateXPointer = generateXPointer;
        this.modifier = modifier;
        this.transforms = transforms;
        this.digestMethod = digestMethod;
    }

    public SecurePart(String externalReference) {
        this.externalReference = externalReference;
    }

    public SecurePart(String externalReference, Modifier modifier) {
        this.externalReference = externalReference;
        this.modifier = modifier;
    }

    public SecurePart(String externalReference, String[] transforms, String digestMethod) {
        this.externalReference = externalReference;
        this.transforms = transforms;
        this.digestMethod = digestMethod;
    }

    /**
     * The name of the element to be secured
     *
     * @return The Element-Local-Name
     */
    public QName getName() {
        return name;
    }

    public void setName(QName name) {
        this.name = name;
    }

    public Modifier getModifier() {
        return modifier;
    }

    public void setModifier(Modifier modifier) {
        this.modifier = modifier;
    }

    /**
     * The ID of the element to secure (encrypt or sign), possibly {@code null}.
     * This matches the attribute value of an element that has an attribute with a name given by
     * {@link XMLSecurityProperties#getIdAttributeNS()}.
     *
     * @return The ID of the element to secure, possibly {@code null}.
     */
    public String getIdToSecure() {
        return idToSecure;
    }

    public void setIdToSecure(String idToSecure) {
        this.idToSecure = idToSecure;
    }

    /**
     * Use {@link #getIdToSecure()} instead.
     */
    @Deprecated
    public String getIdToSign() {
        return getIdToSecure();
    }

    /**
     * Use {@link #setIdToSecure(String)} instead.
     * @param idToSign
     */
    @Deprecated
    public void setIdToSign(String idToSign) {
        setIdToSecure(idToSign);
    }

    public boolean isGenerateXPointer() {
        return generateXPointer;
    }

    public void setGenerateXPointer(boolean generateXPointer) {
        this.generateXPointer = generateXPointer;
    }

    public String getExternalReference() {
        return externalReference;
    }

    public void setExternalReference(String externalReference) {
        this.externalReference = externalReference;
    }

    public String[] getTransforms() {
        return transforms;
    }

    public void setTransforms(String[] transforms) {
        this.transforms = transforms;
    }

    public String getDigestMethod() {
        return digestMethod;
    }

    public void setDigestMethod(String digestMethod) {
        this.digestMethod = digestMethod;
    }

    public boolean isRequired() {
        return required;
    }

    public void setRequired(boolean required) {
        this.required = required;
    }

    public boolean isSecureEntireRequest() {
        return secureEntireRequest;
    }

    public void setSecureEntireRequest(boolean secureEntireRequest) {
        this.secureEntireRequest = secureEntireRequest;
    }
}