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 */
018package org.apache.hadoop.hdfs.web.resources;
019
020import org.apache.hadoop.fs.permission.FsAction;
021
022import java.util.regex.Pattern;
023
024/** {@link FsAction} Parameter */
025public class FsActionParam extends StringParam {
026
027  /** Parameter name. */
028  public static final String NAME = "fsaction";
029
030  /** Default parameter value. */
031  public static final String DEFAULT = NULL;
032
033  private static String FS_ACTION_PATTERN = "[r-][w-][x-]";
034
035  private static final Domain DOMAIN = new Domain(NAME,
036      Pattern.compile(FS_ACTION_PATTERN));
037
038  /**
039   * Constructor.
040   * @param str a string representation of the parameter value.
041   */
042  public FsActionParam(final String str) {
043    super(DOMAIN, str == null || str.equals(DEFAULT)? null: str);
044  }
045
046  /**
047   * Constructor.
048   * @param value the parameter value.
049   */
050  public FsActionParam(final FsAction value) {
051    super(DOMAIN, value == null? null: value.SYMBOL);
052  }
053
054  @Override
055  public String getName() {
056    return NAME;
057  }
058}