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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.simpleemail.model;

import java.io.Serializable;

/**
 * 
 * Represents the message to be sent, composed of a subject and a body.
 * 
 */
public class Message implements Serializable {

    /**
     * The subject of the message: A short summary of the content, which will
     * appear in the recipient's inbox.
     */
    private Content subject;

    /**
     * The message body.
     */
    private Body body;

    /**
     * Default constructor for a new Message object.  Callers should use the
     * setter or fluent setter (with...) methods to initialize this object after creating it.
     */
    public Message() {}
    
    /**
     * Constructs a new Message object.
     * Callers should use the setter or fluent setter (with...) methods to
     * initialize any additional object members.
     * 
     * @param subject The subject of the message: A short summary of the
     * content, which will appear in the recipient's inbox.
     * @param body The message body.
     */
    public Message(Content subject, Body body) {
        setSubject(subject);
        setBody(body);
    }

    /**
     * The subject of the message: A short summary of the content, which will
     * appear in the recipient's inbox.
     *
     * @return The subject of the message: A short summary of the content, which will
     *         appear in the recipient's inbox.
     */
    public Content getSubject() {
        return subject;
    }
    
    /**
     * The subject of the message: A short summary of the content, which will
     * appear in the recipient's inbox.
     *
     * @param subject The subject of the message: A short summary of the content, which will
     *         appear in the recipient's inbox.
     */
    public void setSubject(Content subject) {
        this.subject = subject;
    }
    
    /**
     * The subject of the message: A short summary of the content, which will
     * appear in the recipient's inbox.
     * 
     * Returns a reference to this object so that method calls can be chained together.
     *
     * @param subject The subject of the message: A short summary of the content, which will
     *         appear in the recipient's inbox.
     *
     * @return A reference to this updated object so that method calls can be chained 
     *         together.
     */
    public Message withSubject(Content subject) {
        this.subject = subject;
        return this;
    }

    /**
     * The message body.
     *
     * @return The message body.
     */
    public Body getBody() {
        return body;
    }
    
    /**
     * The message body.
     *
     * @param body The message body.
     */
    public void setBody(Body body) {
        this.body = body;
    }
    
    /**
     * The message body.
     * 
     * Returns a reference to this object so that method calls can be chained together.
     *
     * @param body The message body.
     *
     * @return A reference to this updated object so that method calls can be chained 
     *         together.
     */
    public Message withBody(Body body) {
        this.body = body;
        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 (getSubject() != null) sb.append("Subject: " + getSubject() + ",");
        if (getBody() != null) sb.append("Body: " + getBody() );
        sb.append("}");
        return sb.toString();
    }
    
    @Override
    public int hashCode() {
        final int prime = 31;
        int hashCode = 1;
        
        hashCode = prime * hashCode + ((getSubject() == null) ? 0 : getSubject().hashCode()); 
        hashCode = prime * hashCode + ((getBody() == null) ? 0 : getBody().hashCode()); 
        return hashCode;
    }
    
    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;

        if (obj instanceof Message == false) return false;
        Message other = (Message)obj;
        
        if (other.getSubject() == null ^ this.getSubject() == null) return false;
        if (other.getSubject() != null && other.getSubject().equals(this.getSubject()) == false) return false; 
        if (other.getBody() == null ^ this.getBody() == null) return false;
        if (other.getBody() != null && other.getBody().equals(this.getBody()) == false) return false; 
        return true;
    }
    
}