/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2014 ForgeRock AS.
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*/
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package org.opends.server.replication.server.changelog.file;
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/**
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* Represents a record, which is a pair of key-value.
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*
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* @param <K>
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* The type of a key.
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* @param <V>
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* The type of a value.
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*/
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class Record<K, V>
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{
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private final K key;
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private final V value;
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/**
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* Creates a record from provided key and value.
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*
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* @param key
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* The key.
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* @param value
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* The value.
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*/
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private Record(final K key, final V value)
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{
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this.key = key;
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this.value = value;
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}
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/**
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* Create a record from provided key and value.
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*
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* @param <K>
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* The type of the key.
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* @param <V>
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* The type of the value.
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* @param key
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* The key.
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* @param value
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* The value.
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* @return a record
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*/
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static <K, V> Record<K, V> from(final K key, final V value) {
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return new Record<K, V>(key, value);
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}
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/**
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* Returns the key of this record.
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*
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* @return the key
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*/
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K getKey()
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{
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return key;
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}
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/**
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* Returns the value of this record.
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*
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* @return the value
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*/
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V getValue()
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{
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return value;
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}
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/** {@inheritDoc} */
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@Override
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public int hashCode()
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{
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final int prime = 31;
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int result = 1;
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result = prime * result + ((key == null) ? 0 : key.hashCode());
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result = prime * result + ((value == null) ? 0 : value.hashCode());
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return result;
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}
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/** {@inheritDoc} */
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@Override
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public boolean equals(Object that)
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{
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if (this == that)
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{
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return true;
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}
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if (!(that instanceof Record))
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{
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return false;
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}
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Record<?, ?> other = (Record<?, ?>) that;
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final boolean keyEquals = key == null ? other.key == null : key.equals(other.key);
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if (!keyEquals)
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{
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return false;
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}
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return value == null ? other.value == null : value.equals(other.value);
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}
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/** {@inheritDoc} */
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@Override
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public String toString() {
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return "Record [" + key + ":" + value + "]";
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}
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}
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