| /* |
| * 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.commons.collections4; |
| |
| import java.util.SortedMap; |
| |
| /** |
| * Defines the interface for a prefix tree, an ordered tree data structure. For |
| * more information, see <a href="http://en.wikipedia.org/wiki/Trie">Tries</a>. |
| * |
| * @since 4.0 |
| * @version $Id$ |
| */ |
| public interface Trie<K, V> extends IterableSortedMap<K, V> { |
| |
| /** |
| * Returns a view of this {@link Trie} of all elements that are prefixed |
| * by the given key. |
| * <p> |
| * In a {@link Trie} with fixed size keys, this is essentially a |
| * {@link #get(Object)} operation. |
| * <p> |
| * For example, if the {@link Trie} contains 'Anna', 'Anael', |
| * 'Analu', 'Andreas', 'Andrea', 'Andres', and 'Anatole', then |
| * a lookup of 'And' would return 'Andreas', 'Andrea', and 'Andres'. |
| * |
| * @param key the key used in the search |
| * @return a {@link SortedMap} view of this {@link Trie} with all elements whose |
| * key is prefixed by the search key |
| */ |
| SortedMap<K, V> prefixMap(K key); |
| |
| } |