| /* |
| * 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.rdf; |
| |
| /** |
| * Represents a language as expressed by the RDF 4646 language tag |
| * |
| * @author reto |
| */ |
| public class Language { |
| |
| private String id; |
| |
| /** |
| * Constructs the language tag defined by RDF 4646, normalized to lowercase. |
| * |
| * @param the id as defined by RDF 4646, normalized to lowercase. |
| */ |
| public Language(String id) { |
| if ((id == null) || (id.equals(""))) { |
| throw new IllegalArgumentException("A language id may not be null or empty"); |
| } |
| this.id = id; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other == null) { |
| return false; |
| } |
| if (other instanceof Language) { |
| return id.equals(((Language) other).id); |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return id.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return id; |
| } |
| } |