| /** |
| * 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.lib.wsrs; |
| |
| import java.text.MessageFormat; |
| import java.util.regex.Pattern; |
| |
| public abstract class StringParam extends Param<String> { |
| private Pattern pattern; |
| |
| public StringParam(String name, String defaultValue) { |
| this(name, defaultValue, null); |
| } |
| |
| public StringParam(String name, String defaultValue, Pattern pattern) { |
| super(name, defaultValue); |
| this.pattern = pattern; |
| parseParam(defaultValue); |
| } |
| |
| public String parseParam(String str) { |
| try { |
| if (str != null) { |
| str = str.trim(); |
| if (str.length() > 0) { |
| value = parse(str); |
| } |
| } |
| } catch (Exception ex) { |
| throw new IllegalArgumentException( |
| MessageFormat.format("Parameter [{0}], invalid value [{1}], value must be [{2}]", |
| getName(), str, getDomain())); |
| } |
| return value; |
| } |
| |
| protected String parse(String str) throws Exception { |
| if (pattern != null) { |
| if (!pattern.matcher(str).matches()) { |
| throw new IllegalArgumentException("Invalid value"); |
| } |
| } |
| return str; |
| } |
| |
| @Override |
| protected String getDomain() { |
| return (pattern == null) ? "a string" : pattern.pattern(); |
| } |
| } |