001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau.internal;
018
019import java.util.*;
020
021/**
022 * Stores a set of language keywords for quick lookup.
023 *
024 * <h5 class='section'>See Also:</h5><ul>
025
026 * </ul>
027 */
028public class KeywordSet {
029   final String[] store;
030
031   /**
032    * Constructor.
033    *
034    * @param keywords The list of keywords.
035    */
036   public KeywordSet(String... keywords) {
037      this.store = keywords;
038      Arrays.sort(store);
039   }
040
041   /**
042    * Returns <jk>true</jk> if the specified string exists in this store.
043    *
044    * @param s The string to check.
045    * @return <jk>true</jk> if the specified string exists in this store.
046    */
047   public boolean contains(String s) {
048      if (s == null || s.length() < 2)
049         return false;
050      return Arrays.binarySearch(store, s) >= 0;
051   }
052}