| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache 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.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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.apache.directory.mavibot.btree; |
| |
| |
| import java.util.Comparator; |
| |
| |
| /** |
| * The Tuple class is used when we browse a btree, it will contain the results |
| * fetched from the btree. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * |
| * @param <K> The type for the Key |
| * @param <V> The type for the stored value |
| */ |
| public class Tuple<K, V> implements Comparable<Tuple<K, V>> |
| { |
| /** The key */ |
| protected K key; |
| |
| /** The value */ |
| protected V value; |
| |
| /** The key comparator */ |
| protected Comparator<K> keyComparator; |
| |
| |
| /** |
| * Creates a Tuple with no content |
| */ |
| public Tuple() |
| { |
| } |
| |
| |
| /** |
| * Creates a Tuple containing a key and its associated value. |
| * @param key The key |
| * @param value The associated value |
| */ |
| public Tuple( K key, V value ) |
| { |
| this.key = key; |
| this.value = value; |
| } |
| |
| |
| /** |
| * Creates a Tuple containing a key and its associated value. |
| * @param key The key |
| * @param value The associated value |
| */ |
| public Tuple( K key, V value, Comparator<K> keyComparator ) |
| { |
| this.key = key; |
| this.value = value; |
| this.keyComparator = keyComparator; |
| } |
| |
| |
| /** |
| * @return the key |
| */ |
| public K getKey() |
| { |
| return key; |
| } |
| |
| |
| /** |
| * @param key the key to set |
| */ |
| public void setKey( K key ) |
| { |
| this.key = key; |
| } |
| |
| |
| /** |
| * @return the value |
| */ |
| public V getValue() |
| { |
| return value; |
| } |
| |
| |
| /** |
| * @param value the value to set |
| */ |
| public void setValue( V value ) |
| { |
| this.value = value; |
| } |
| |
| |
| /** |
| * @see Object#hashCode() |
| */ |
| @Override |
| public int hashCode() |
| { |
| return key.hashCode(); |
| } |
| |
| |
| /** |
| * @see Object#equals() |
| */ |
| @SuppressWarnings("unchecked") |
| @Override |
| public boolean equals( Object obj ) |
| { |
| if ( this == obj ) |
| { |
| return true; |
| } |
| |
| if ( !( obj instanceof Tuple ) ) |
| { |
| return false; |
| } |
| |
| if ( this.key == null ) |
| { |
| return ( ( Tuple<K, V> ) obj ).key == null; |
| } |
| |
| return this.key.equals( ( ( Tuple<K, V> ) obj ).key ); |
| } |
| |
| |
| /** |
| * @see java.lang.Comparable#compareTo(java.lang.Object) |
| */ |
| @Override |
| public int compareTo( Tuple<K, V> t ) |
| { |
| if ( keyComparator != null ) |
| { |
| return keyComparator.compare( key, t.key ); |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| |
| |
| /** |
| * @return the keyComparator |
| */ |
| public Comparator<K> getKeyComparator() |
| { |
| return keyComparator; |
| } |
| |
| |
| /** |
| * @param keyComparator the keyComparator to set |
| */ |
| public void setKeyComparator( Comparator<K> keyComparator ) |
| { |
| this.keyComparator = keyComparator; |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| return "<" + key + "," + value + ">"; |
| } |
| } |