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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.encryption;

import java.util.Iterator;

/**
 * EncryptionProperties can hold additional information concerning
 * the generation of the EncryptedData or
 * EncryptedKey. This information is wraped int an
 * EncryptionProperty element. Examples of additional information
 * is e.g., a date/time stamp or the serial number of cryptographic hardware
 * used during encryption).
 * 
 * It is defined as follows:
 * 

 * <element name='EncryptionProperties' type='xenc:EncryptionPropertiesType'/>
 * <complexType name='EncryptionPropertiesType'>
 *     <sequence>
 *         <element ref='xenc:EncryptionProperty' maxOccurs='unbounded'/>
 *     </sequence>
 *     <attribute name='Id' type='ID' use='optional'/>
 * </complexType>
 * 
 *
 * @author Axl Mattheus
 */
public interface EncryptionProperties {
    
    /**
     * Returns the EncryptionProperties' id.
     *
     * @return the id.
     */
    String getId();

    /**
     * Sets the id.
     *
     * @param id the id.
     */
    void setId(String id);

    /**
     * Returns an Iterator over all the
     * EncryptionPropterty elements contained in this
     * EncryptionProperties.
     *
     * @return an Iterator over all the encryption properties.
     */
    Iterator getEncryptionProperties();

    /**
     * Adds an EncryptionProperty.
     *
     * @param property
     */
    void addEncryptionProperty(EncryptionProperty property);

    /**
     * Removes the specified EncryptionProperty.
     *
     * @param property
     */
    void removeEncryptionProperty(EncryptionProperty property);
}