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The Amazon Web Services 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 2010-2014 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.elasticloadbalancing.model;

import java.io.Serializable;

/**
 * 
 * The Instance data type.
 * 
 */
public class Instance implements Serializable {

    /**
     * Provides an EC2 instance ID.
     */
    private String instanceId;

    /**
     * Default constructor for a new Instance object.  Callers should use the
     * setter or fluent setter (with...) methods to initialize this object after creating it.
     */
    public Instance() {}
    
    /**
     * Constructs a new Instance object.
     * Callers should use the setter or fluent setter (with...) methods to
     * initialize any additional object members.
     * 
     * @param instanceId Provides an EC2 instance ID.
     */
    public Instance(String instanceId) {
        setInstanceId(instanceId);
    }

    /**
     * Provides an EC2 instance ID.
     *
     * @return Provides an EC2 instance ID.
     */
    public String getInstanceId() {
        return instanceId;
    }
    
    /**
     * Provides an EC2 instance ID.
     *
     * @param instanceId Provides an EC2 instance ID.
     */
    public void setInstanceId(String instanceId) {
        this.instanceId = instanceId;
    }
    
    /**
     * Provides an EC2 instance ID.
     * 
     * Returns a reference to this object so that method calls can be chained together.
     *
     * @param instanceId Provides an EC2 instance ID.
     *
     * @return A reference to this updated object so that method calls can be chained 
     *         together.
     */
    public Instance withInstanceId(String instanceId) {
        this.instanceId = instanceId;
        return this;
    }

    /**
     * Returns a string representation of this object; useful for testing and
     * debugging.
     *
     * @return A string representation of this object.
     *
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getInstanceId() != null) sb.append("InstanceId: " + getInstanceId() );
        sb.append("}");
        return sb.toString();
    }
    
    @Override
    public int hashCode() {
        final int prime = 31;
        int hashCode = 1;
        
        hashCode = prime * hashCode + ((getInstanceId() == null) ? 0 : getInstanceId().hashCode()); 
        return hashCode;
    }
    
    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;

        if (obj instanceof Instance == false) return false;
        Instance other = (Instance)obj;
        
        if (other.getInstanceId() == null ^ this.getInstanceId() == null) return false;
        if (other.getInstanceId() != null && other.getInstanceId().equals(this.getInstanceId()) == false) return false; 
        return true;
    }
    
}