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    package org.apache.hadoop.hdfs.web.resources;
019    
020    
021    /** Exclude datanodes param */
022    public class ExcludeDatanodesParam extends StringParam {
023      /** Parameter name. */
024      public static final String NAME = "excludedatanodes";
025      /** Default parameter value. */
026      public static final String DEFAULT = "";
027    
028      private static final Domain DOMAIN = new Domain(NAME, null);
029    
030      /**
031       * Constructor.
032       * @param str a string representation of the parameter value.
033       */
034      public ExcludeDatanodesParam(final String str) {
035        super(DOMAIN, str == null || str.equals(DEFAULT)? null: DOMAIN.parse(str));
036      }
037    
038      @Override
039      public String getName() {
040        return NAME;
041      }
042    }