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NullType.java
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50 lines (43 loc) · 1.35 KB
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.orc.tools.json;
import org.apache.orc.TypeDescription;
/**
* The type that only includes the null value.
*/
class NullType extends HiveType {
NullType() {
super(Kind.NULL);
}
@Override
public String toString() {
return "void";
}
@Override
public boolean subsumes(HiveType other) {
return other.kind == Kind.NULL;
}
@Override
public void merge(HiveType other) {
// nothing to do to merge null types *smile*
}
@Override
public TypeDescription getSchema() {
return TypeDescription.createUnion();
}
}