| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.web.resources; |
| |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| import java.text.MessageFormat; |
| import java.util.regex.Pattern; |
| |
| /** User parameter. */ |
| public class UserParam extends StringParam { |
| /** Parameter name. */ |
| public static final String NAME = "user.name"; |
| /** Default parameter value. */ |
| public static final String DEFAULT = ""; |
| |
| private static final Domain DOMAIN = new Domain(NAME, |
| Pattern.compile("^[A-Za-z_][A-Za-z0-9._-]*[$]?$")); |
| |
| private static String validateLength(String str) { |
| if (str == null) { |
| throw new IllegalArgumentException( |
| MessageFormat.format("Parameter [{0}], cannot be NULL", NAME)); |
| } |
| int len = str.length(); |
| if (len < 1) { |
| throw new IllegalArgumentException(MessageFormat.format( |
| "Parameter [{0}], it's length must be at least 1", NAME)); |
| } |
| return str; |
| } |
| |
| /** |
| * Constructor. |
| * @param str a string representation of the parameter value. |
| */ |
| public UserParam(final String str) { |
| super(DOMAIN, str == null || str.equals(DEFAULT)? null : validateLength(str)); |
| } |
| |
| /** |
| * Construct an object from a UGI. |
| */ |
| public UserParam(final UserGroupInformation ugi) { |
| this(ugi.getShortUserName()); |
| } |
| |
| @Override |
| public String getName() { |
| return NAME; |
| } |
| } |