| /* |
| * 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 org.apache.commons.collections4.trie.UnmodifiableTrie; |
| |
| /** |
| * A collection of {@link Trie} utilities. |
| * |
| * @since 4.0 |
| * @version $Id$ |
| */ |
| public class TrieUtils { |
| |
| /** |
| * {@link TrieUtils} should not normally be instantiated. |
| */ |
| private TrieUtils() {} |
| |
| /** |
| * Returns an unmodifiable instance of a {@link Trie} |
| * |
| * @param <K> the key type |
| * @param <V> the value type |
| * @param trie the trie to make unmodifiable, must not be null |
| * @return an unmodifiable trie backed by the given trie |
| * @throws NullPointerException if trie is null |
| * |
| * @see java.util.Collections#unmodifiableMap(java.util.Map) |
| */ |
| public static <K, V> Trie<K, V> unmodifiableTrie(final Trie<K, ? extends V> trie) { |
| return UnmodifiableTrie.unmodifiableTrie(trie); |
| } |
| |
| } |