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