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/*
*
* 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);
}
}
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