001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.lib.wsrs;
020    
021    import org.apache.hadoop.classification.InterfaceAudience;
022    
023    import java.text.MessageFormat;
024    
025    @InterfaceAudience.Private
026    public abstract class BooleanParam extends Param<Boolean> {
027    
028      public BooleanParam(String name, Boolean defaultValue) {
029        super(name, defaultValue);
030      }
031    
032      protected Boolean parse(String str) throws Exception {
033        if (str.equalsIgnoreCase("true")) {
034          return true;
035        } else if (str.equalsIgnoreCase("false")) {
036          return false;
037        }
038        throw new IllegalArgumentException(MessageFormat.format("Invalid value [{0}], must be a boolean", str));
039      }
040    
041      @Override
042      protected String getDomain() {
043        return "a boolean";
044      }
045    }