| /** |
| * 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 java.util.regex.Pattern; |
| |
| /** String parameter. */ |
| abstract class StringParam extends Param<String, StringParam.Domain> { |
| StringParam(final Domain domain, String str) { |
| super(domain, domain.parse(str)); |
| } |
| |
| /** @return the parameter value as a string */ |
| @Override |
| public String getValueString() { |
| return value; |
| } |
| |
| /** The domain of the parameter. */ |
| static final class Domain extends Param.Domain<String> { |
| /** The pattern defining the domain; null . */ |
| private final Pattern pattern; |
| |
| Domain(final String paramName, final Pattern pattern) { |
| super(paramName); |
| this.pattern = pattern; |
| } |
| |
| @Override |
| public final String getDomain() { |
| return pattern == null ? "<String>" : pattern.pattern(); |
| } |
| |
| @Override |
| final String parse(final String str) { |
| if (str != null && pattern != null) { |
| if (!pattern.matcher(str).matches()) { |
| throw new IllegalArgumentException("Invalid value: \"" + str |
| + "\" does not belong to the domain " + getDomain()); |
| } |
| } |
| return str; |
| } |
| } |
| } |