/*
* Copyright 2015 Martin Kouba
*
* Licensed 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.trimou.engine.resolver;
/**
*
* @author Martin Kouba
*/
public enum Placeholder {
/**
* This might be useful to distinguish the case when a value resolver should
* return a value which should be interpreted as a <code>null</code>.
* Normally, a resolver returns <code>null</code> in case it's not
* capable of resolving the value.
*/
NULL,
}