/* | |
* 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 JsonNull | |
* | |
* @since 1.8 | |
*/ | |
public static final JsonNull INSTANCE = new JsonNull(); | |
/** | |
* Creates a new JsonNull object. | |
* 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 JsonNull have the same hash code since they are indistinguishable | |
*/ | |
@Override | |
public int hashCode() { | |
return JsonNull.class.hashCode(); | |
} | |
/** | |
* All instances of JsonNull are the same | |
*/ | |
@Override | |
public boolean equals(Object other) { | |
return this == other || other instanceof JsonNull; | |
} | |
} |