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The AWS SDK for Java with support for OSGi. The AWS SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright (c) 2016. Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 * http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.services.elasticmapreduce.spi.security;

import javax.crypto.SecretKey;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

/**
 * The "key encrypting key" materials used in encrypt/decryption.
 * Only symmetric key is supported for now.
 */
public class EncryptionMaterials implements Serializable {
  private final SecretKey symmetricKey;
  private final Map description = new HashMap();


  /**
   * Constructs a new EncryptionMaterials object, storing a symmetric key.
   *
   * @param symmetricKey The symmetric key to be stored in this EncryptionMaterials object.
   */
  public EncryptionMaterials(SecretKey symmetricKey) {
    this.symmetricKey = symmetricKey;
  }

  /**
   * Returns the symmetric key stored in this EncryptionMaterials object.
   *
   * @return the symmetric key stored in this EncryptionMaterials object.
   */
  public SecretKey getSymmetricKey() {
    return this.symmetricKey;
  }

  /**
   * Returns a snapshot of the current material description; never null.
   */
  public Map getMaterialsDescription() {
    return new HashMap(description);
  }

  /**
   * Fluent API to add material description.
   */
  public EncryptionMaterials withDescription(String name, String value) {
    description.put(name, value);
    return this;
  }

  /**
   * Fluent API to add all the given material descriptions.
   */
  public EncryptionMaterials withDescriptions(Map descriptions) {
    description.putAll(descriptions);
    return this;
  }
}