/**
* 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.hadoop.hive.serde2.typeinfo;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hive.serde.serdeConstants;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector.Category;
/**
* UnionTypeInfo represents the TypeInfo of an union. A union holds only one
* field of the specified fields at any point of time. The fields, a Union can
* hold, can have the same or different TypeInfo.
*
* Always use the TypeInfoFactory to create new TypeInfo objects, instead of
* directly creating an instance of this class.
*/
public class UnionTypeInfo extends TypeInfo implements Serializable {
private static final long serialVersionUID = 1L;
private List<TypeInfo> allUnionObjectTypeInfos;
/**
* For java serialization use only.
*/
public UnionTypeInfo() {
}
@Override
public String getTypeName() {
StringBuilder sb = new StringBuilder();
sb.append(serdeConstants.UNION_TYPE_NAME + "<");
for (int i = 0; i < allUnionObjectTypeInfos.size(); i++) {
if (i > 0) {
sb.append(",");
}
sb.append(allUnionObjectTypeInfos.get(i).getTypeName());
}
sb.append(">");
return sb.toString();
}
/**
* For java serialization use only.
*/
public void setAllUnionObjectTypeInfos(
List<TypeInfo> allUnionObjectTypeInfos) {
this.allUnionObjectTypeInfos = allUnionObjectTypeInfos;
}
/**
* For TypeInfoFactory use only.
*/
UnionTypeInfo(List<TypeInfo> typeInfos) {
allUnionObjectTypeInfos = new ArrayList<TypeInfo>();
allUnionObjectTypeInfos.addAll(typeInfos);
}
@Override
public Category getCategory() {
return Category.UNION;
}
public List<TypeInfo> getAllUnionObjectTypeInfos() {
return allUnionObjectTypeInfos;
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof UnionTypeInfo)) {
return false;
}
UnionTypeInfo o = (UnionTypeInfo) other;
// Compare the field types
return o.getAllUnionObjectTypeInfos().equals(getAllUnionObjectTypeInfos());
}
@Override
public int hashCode() {
return allUnionObjectTypeInfos.hashCode();
}
}