/**
    * Copyright 2004-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.common.aws.model;
  
  import static org.kuali.common.util.base.Precondition.checkNotBlank;
  
  import com.amazonaws.auth.AWSCredentials;
  
  public final class ImmutableAWSCredentials implements AWSCredentials {
  
  	public static ImmutableAWSCredentials copyOf(AWSCredentials credentials) {
  		if (credentials instanceof ImmutableAWSCredentials) {
  			return (ImmutableAWSCredentials) credentials;
  		} else {
  			return new ImmutableAWSCredentials(credentials.getAWSAccessKeyId(), credentials.getAWSSecretKey());
  		}
  	}
  
  	public ImmutableAWSCredentials(String accessKey, String secretKey) {
  		this.accessKey = checkNotBlank(accessKey, "accessKey");
  		this.secretKey = checkNotBlank(secretKey, "secretKey");
  	}
  
  	private final String accessKey;
  	private final String secretKey;
  
  	@Override
  	public String getAWSAccessKeyId() {
  		return accessKey;
  	}
  
  	@Override
  	public String getAWSSecretKey() {
  		return secretKey;
  	}
  
  }