/**
* 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.objectinspector.primitive;
import org.apache.hadoop.hive.common.type.HiveDecimal;
import org.apache.hadoop.hive.serde2.io.HiveDecimalWritable;
import org.apache.hadoop.hive.serde2.objectinspector.ConstantObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.DecimalTypeInfo;
/**
* A WritableConstantHiveDecimalObjectInspector is a WritableHiveDecimalObjectInspector
* that implements ConstantObjectInspector.
*/
public class WritableConstantHiveDecimalObjectInspector extends WritableHiveDecimalObjectInspector
implements ConstantObjectInspector {
private HiveDecimalWritable value;
protected WritableConstantHiveDecimalObjectInspector() {
super();
}
WritableConstantHiveDecimalObjectInspector(DecimalTypeInfo typeInfo,
HiveDecimalWritable value) {
super(typeInfo);
this.value = value;
}
@Override
public HiveDecimalWritable getWritableConstantValue() {
// We need to enforce precision/scale here.
// A little inefficiency here as we need to create a HiveDecimal instance from the writable and
// recreate a HiveDecimalWritable instance on the HiveDecimal instance. However, we don't know
// the precision/scale of the original writable until we get a HiveDecimal instance from it.
DecimalTypeInfo decTypeInfo = (DecimalTypeInfo)typeInfo;
HiveDecimal dec = value == null ? null :
value.getHiveDecimal(decTypeInfo.precision(), decTypeInfo.scale());
if (dec == null) {
return null;
}
return new HiveDecimalWritable(dec);
}
@Override
public int precision() {
if (value == null) {
return super.precision();
}
return value.getHiveDecimal().precision();
}
@Override
public int scale() {
if (value == null) {
return super.scale();
}
return value.getHiveDecimal().scale();
}
}