org.rapidoid.util.None Maven / Gradle / Ivy
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/*-
* #%L
* rapidoid-commons
* %%
* Copyright (C) 2014 - 2018 Nikolche Mihajlovski and contributors
* %%
* 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.
* #L%
*/
package org.rapidoid.util;
import org.rapidoid.RapidoidThing;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
/**
* A special singleton type, marking no value, as a replacement for null.
*
* Supported in the serialization.
*/
@Authors("Nikolche Mihajlovski")
@Since("5.2.0")
public class None extends RapidoidThing {
public static final None NONE = new None();
private None() {
}
@Override
public String toString() {
return "NONE";
}
}