/*
 * Copyright 2010-2019 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.dynamodbv2.model;

import java.io.Serializable;

/**
 * <p>
 * Represents a request to perform a <code>DeleteItem</code> operation on an
 * item.
 * </p>
 */
public class DeleteRequest implements Serializable {
    /**
     * <p>
     * A map of attribute name to attribute values, representing the primary key
     * of the item to delete. All of the table's primary key attributes must be
     * specified, and their data types must match those of the table's key
     * schema.
     * </p>
     */
    private java.util.Map<String, AttributeValue> key;

    /**
     * Default constructor for DeleteRequest object. Callers should use the
     * setter or fluent setter (with...) methods to initialize any additional
     * object members.
     */
    public DeleteRequest() {
    }

    /**
     * Constructs a new DeleteRequest object. Callers should use the setter or
     * fluent setter (with...) methods to initialize any additional object
     * members.
     * 
     * @param key <p>
     *            A map of attribute name to attribute values, representing the
     *            primary key of the item to delete. All of the table's primary
     *            key attributes must be specified, and their data types must
     *            match those of the table's key schema.
     *            </p>
     */
    public DeleteRequest(java.util.Map<String, AttributeValue> key) {
        setKey(key);
    }

    /**
     * <p>
     * A map of attribute name to attribute values, representing the primary key
     * of the item to delete. All of the table's primary key attributes must be
     * specified, and their data types must match those of the table's key
     * schema.
     * </p>
     *
     * @return <p>
     *         A map of attribute name to attribute values, representing the
     *         primary key of the item to delete. All of the table's primary key
     *         attributes must be specified, and their data types must match
     *         those of the table's key schema.
     *         </p>
     */
    public java.util.Map<String, AttributeValue> getKey() {
        return key;
    }

    /**
     * <p>
     * A map of attribute name to attribute values, representing the primary key
     * of the item to delete. All of the table's primary key attributes must be
     * specified, and their data types must match those of the table's key
     * schema.
     * </p>
     *
     * @param key <p>
     *            A map of attribute name to attribute values, representing the
     *            primary key of the item to delete. All of the table's primary
     *            key attributes must be specified, and their data types must
     *            match those of the table's key schema.
     *            </p>
     */
    public void setKey(java.util.Map<String, AttributeValue> key) {
        this.key = key;
    }

    /**
     * <p>
     * A map of attribute name to attribute values, representing the primary key
     * of the item to delete. All of the table's primary key attributes must be
     * specified, and their data types must match those of the table's key
     * schema.
     * </p>
     * <p>
     * Returns a reference to this object so that method calls can be chained
     * together.
     *
     * @param key <p>
     *            A map of attribute name to attribute values, representing the
     *            primary key of the item to delete. All of the table's primary
     *            key attributes must be specified, and their data types must
     *            match those of the table's key schema.
     *            </p>
     * @return A reference to this updated object so that method calls can be
     *         chained together.
     */
    public DeleteRequest withKey(java.util.Map<String, AttributeValue> key) {
        this.key = key;
        return this;
    }

    /**
     * <p>
     * A map of attribute name to attribute values, representing the primary key
     * of the item to delete. All of the table's primary key attributes must be
     * specified, and their data types must match those of the table's key
     * schema.
     * </p>
     * <p>
     * The method adds a new key-value pair into Key parameter, and returns a
     * reference to this object so that method calls can be chained together.
     *
     * @param key The key of the entry to be added into Key.
     * @param value The corresponding value of the entry to be added into Key.
     * @return A reference to this updated object so that method calls can be
     *         chained together.
     */
    public DeleteRequest addKeyEntry(String key, AttributeValue value) {
        if (null == this.key) {
            this.key = new java.util.HashMap<String, AttributeValue>();
        }
        if (this.key.containsKey(key))
            throw new IllegalArgumentException("Duplicated keys (" + key.toString()
                    + ") are provided.");
        this.key.put(key, value);
        return this;
    }

    /**
     * Removes all the entries added into Key.
     * <p>
     * Returns a reference to this object so that method calls can be chained
     * together.
     */
    public DeleteRequest clearKeyEntries() {
        this.key = null;
        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 (getKey() != null)
            sb.append("Key: " + getKey());
        sb.append("}");
        return sb.toString();
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int hashCode = 1;

        hashCode = prime * hashCode + ((getKey() == null) ? 0 : getKey().hashCode());
        return hashCode;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;

        if (obj instanceof DeleteRequest == false)
            return false;
        DeleteRequest other = (DeleteRequest) obj;

        if (other.getKey() == null ^ this.getKey() == null)
            return false;
        if (other.getKey() != null && other.getKey().equals(this.getKey()) == false)
            return false;
        return true;
    }
}