cn.wjybxx.dson.DsonNull Maven / Gradle / Ivy
/*
* Copyright 2023-2024 wjybxx([email protected])
*
* 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 cn.wjybxx.dson;
import javax.annotation.Nonnull;
/**
* @author wjybxx
* date - 2023/4/19
*/
public final class DsonNull extends DsonValue implements Comparable {
public static final DsonNull NULL = new DsonNull();
/** 用于不存在对应key时的返回值，用于特殊情况下的测试 */
public static final DsonNull UNDEFINE = new DsonNull();
private DsonNull() {
}
@Nonnull
@Override
public DsonType getDsonType() {
return DsonType.NULL;
}
//region equals
@Override
public boolean equals(final Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
return true;
}
@Override
public int hashCode() {
return 0;
}
@Override
public int compareTo(DsonNull o) {
return 0;
}
// endregion
@Override
public String toString() {
return "DsonNull{}";
}
}