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/*
* Copyright (C) 2008 Google Inc.
*
* 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 com.google.gson;
/**
* A class representing a JSON {@code null} value.
*
* @author Inderjeet Singh
* @author Joel Leitch
* @since 1.2
*/
public final class JsonNull extends JsonElement {
/**
* Singleton for {@code JsonNull}.
*
* @since 1.8
*/
public static final JsonNull INSTANCE = new JsonNull();
/**
* Creates a new {@code JsonNull} object.
*
* @deprecated Deprecated since Gson version 1.8, use {@link #INSTANCE} instead.
*/
@Deprecated
public JsonNull() {
// Do nothing
}
/**
* Returns the same instance since it is an immutable value.
*
* @since 2.8.2
*/
@Override
public JsonNull deepCopy() {
return INSTANCE;
}
/**
* All instances of {@code JsonNull} have the same hash code since they are indistinguishable.
*/
@Override
public int hashCode() {
return JsonNull.class.hashCode();
}
/**
* All instances of {@code JsonNull} are considered equal.
*/
@Override
public boolean equals(Object other) {
return this == other || other instanceof JsonNull;
}
}
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