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    import java.util.regex.Pattern;
021    
022    public class XAttrNameParam extends StringParam {
023      /** Parameter name. **/
024      public static final String NAME = "xattr.name";
025      /** Default parameter value. **/
026      public static final String DEFAULT = "";
027      
028      private static Domain DOMAIN = new Domain(NAME,
029          Pattern.compile(".*"));
030      
031      public XAttrNameParam(final String str) {
032        super(DOMAIN, str == null || str.equals(DEFAULT) ? null : str);
033      }
034    
035      @Override
036      public String getName() {
037        return NAME;
038      }
039      
040      public String getXAttrName() {
041        final String v = getValue();
042        return v;
043      }
044    }