| /* |
| * |
| * 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.qpid.tasks; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.Task; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * BaseTask -- an abstract base task for blaze specific tasks. |
| **/ |
| |
| public abstract class BaseTask extends Task { |
| |
| private static Set EMPTY = new HashSet(); |
| { |
| EMPTY.add(0); |
| EMPTY.add(""); |
| } |
| |
| public static class Validator { |
| |
| private String name; |
| private Object value; |
| |
| private Validator(String name, Object value) { |
| this.name = name; |
| this.value = value; |
| } |
| |
| public Validator required() { |
| if (value == null) { |
| error("value is required"); |
| } |
| return this; |
| } |
| |
| public Validator nonempty() { |
| if (EMPTY.contains(value)) { |
| error("value is empty"); |
| } |
| return this; |
| } |
| |
| private void error(String msg) { |
| throw new BuildException(name + ": " + msg); |
| } |
| } |
| |
| public Validator validate(String name, Object value) { |
| return new Validator(name, value); |
| } |
| |
| } |