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HiveType.java
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HiveType.java
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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 com.facebook.giraph.hive.common;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils;
import static org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector.PrimitiveCategory;
public enum HiveType {
BOOLEAN(NativeType.BOOLEAN),
BYTE(NativeType.LONG),
SHORT(NativeType.LONG),
INT(NativeType.LONG),
LONG(NativeType.LONG),
FLOAT(NativeType.DOUBLE),
DOUBLE(NativeType.DOUBLE),
STRING(NativeType.STRING),
LIST(null),
MAP(null),
STRUCT(null),
UNION(null);
private final NativeType nativeType;
HiveType(NativeType nativeType) {
this.nativeType = nativeType;
}
public boolean isCollection() {
return nativeType == null;
}
public boolean isPrimitive() {
return nativeType != null;
}
public NativeType getNativeType() {
return nativeType;
}
public static HiveType fromHiveObjectInspector(ObjectInspector objectInspector) {
TypeInfo typeInfo = TypeInfoUtils.getTypeInfoFromObjectInspector(objectInspector);
switch (typeInfo.getCategory()) {
case PRIMITIVE:
PrimitiveObjectInspector primitiveInspector = (PrimitiveObjectInspector) objectInspector;
return fromHivePrimitiveCategory(primitiveInspector.getPrimitiveCategory());
case LIST:
return LIST;
case MAP:
return MAP;
case STRUCT:
return STRUCT;
case UNION:
return UNION;
default:
throw new IllegalArgumentException("Can't handle typeInfo " + typeInfo);
}
}
public static HiveType fromHivePrimitiveCategory(PrimitiveCategory primitiveCategory) {
switch (primitiveCategory) {
case BOOLEAN:
return BOOLEAN;
case BYTE:
return BYTE;
case SHORT:
return SHORT;
case INT:
return INT;
case LONG:
return LONG;
case FLOAT:
return FLOAT;
case DOUBLE:
return DOUBLE;
case STRING:
return STRING;
default:
throw new IllegalArgumentException("Can't handle primitive category " +
primitiveCategory);
}
}
}