/*
* 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 groovy.transform;
import org.codehaus.groovy.ast.ClassNode;
/**
* Java doesn't allow you to have null as an attribute value. It wants you to indicate what you really
* mean by null, so that is what we do here - as ugly as it is.
*/
public final class Undefined {
private Undefined() {}
public static final String STRING = "<DummyUndefinedMarkerString-DoNotUse>";
public static final class CLASS {}
public static final class EXCEPTION extends RuntimeException {
private static final long serialVersionUID = -3960500360386581172L;
}
public static boolean isUndefined(String other) { return STRING.equals(other); }
public static boolean isUndefined(ClassNode other) { return CLASS.class.getName().equals(other.getName()); }
public static boolean isUndefinedException(ClassNode other) { return EXCEPTION.class.getName().equals(other.getName()); }
}