/**
    * 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.ec2.impl;
  
  import org.kuali.common.aws.ec2.api.EC2Service;
  import org.kuali.common.aws.ec2.model.InstanceStateName;
  import org.kuali.common.util.Assert;
  import org.kuali.common.util.condition.Condition;
  
  import com.amazonaws.services.ec2.model.Instance;
  import com.amazonaws.services.ec2.model.InstanceState;
  
  /**
   * This condition being met means that the corresponding EC2 instance has reached <code>targetState</code>
   */
  public final class InstanceStateCondition implements Condition {
  
  	public InstanceStateCondition(EC2Service service, String instanceId, InstanceStateName targetState) {
  		Assert.noNulls(service, targetState);
  		Assert.noBlanks(instanceId);
  		this.instanceId = instanceId;
  		this.service = service;
  		this.targetState = targetState;
  	}
  
  	private final EC2Service service;
  	private final String instanceId;
  	private final InstanceStateName targetState;
  
  	@Override
  	public boolean isTrue() {
  		Instance instance = service.getInstance(instanceId);
  		InstanceState instanceState = instance.getState();
  		String stateName = instanceState.getName();
  		return targetState.getValue().equals(stateName);
  	}
  
  	public EC2Service getService() {
  		return service;
  	}
  
  	public String getInstanceId() {
  		return instanceId;
  	}
  
  	public InstanceStateName getTargetState() {
  		return targetState;
  	}
  
  }