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ListType.java
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87 lines (74 loc) · 2.37 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;
import java.io.PrintStream;
/**
* A model for types that are lists.
*/
class ListType extends HiveType {
HiveType elementType;
ListType() {
super(Kind.LIST);
}
ListType(HiveType child) {
super(Kind.LIST);
this.elementType = child;
}
@Override
public String toString() {
StringBuilder buf = new StringBuilder("list<");
buf.append(elementType.toString());
buf.append(">");
return buf.toString();
}
@Override
public boolean equals(Object other) {
return super.equals(other) &&
elementType.equals(((ListType) other).elementType);
}
@Override
public int hashCode() {
return super.hashCode() * 3 + elementType.hashCode();
}
@Override
public boolean subsumes(HiveType other) {
return other.kind == Kind.NULL || other.kind == Kind.LIST;
}
@Override
public void merge(HiveType other) {
if (other instanceof ListType otherList) {
if (elementType.subsumes(otherList.elementType)) {
elementType.merge(otherList.elementType);
} else if (otherList.elementType.subsumes(elementType)) {
otherList.elementType.merge(elementType);
elementType = otherList.elementType;
} else {
elementType = new UnionType(elementType, otherList.elementType);
}
}
}
@Override
public void printFlat(PrintStream out, String prefix) {
elementType.printFlat(out, prefix + "._list");
}
@Override
public TypeDescription getSchema() {
return TypeDescription.createList(elementType.getSchema());
}
}