com.amazon.ionhiveserde.objectinspectors.IonTimestampToTimestampObjectInspector Maven / Gradle / Ivy

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An Apache Hive SerDe (short for serializer/deserializer) for the Ion file format.

There is a newer version: 1.2.0

/*
 * Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazon.ionhiveserde.objectinspectors;

import com.amazon.ion.IonTimestamp;
import com.amazon.ion.IonValue;
import org.apache.hadoop.hive.common.type.Timestamp;
import org.apache.hadoop.hive.serde2.io.TimestampWritable;
import org.apache.hadoop.hive.serde2.io.TimestampWritableV2;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.TimestampObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;

/**
 * Adapts an {@link IonTimestamp} for the timestamp Hive type.
 */
public class IonTimestampToTimestampObjectInspector extends AbstractIonPrimitiveJavaObjectInspector implements
    TimestampObjectInspector {

    public IonTimestampToTimestampObjectInspector() {
        super(TypeInfoFactory.timestampTypeInfo);
    }

    @Override
    public TimestampWritableV2 getPrimitiveWritableObject(final Object o) {
        if (IonUtil.isIonNull((IonValue) o)) {
            return null;
        }

        return new TimestampWritableV2(getPrimitiveJavaObject((IonTimestamp) o));
    }

    @Override
    public Timestamp getPrimitiveJavaObject(final Object o) {
        if (IonUtil.isIonNull((IonValue) o)) {
            return null;
        }

        return getPrimitiveJavaObject((IonTimestamp) o);
    }

    private Timestamp getPrimitiveJavaObject(final IonTimestamp ionValue) {
        // Hive timestamps don't have offset so we always map the ion timestamp to UTC
        // IonTimestamp.getMillis() is milliseconds from 1970-01-01T00:00:00.000Z

        return Timestamp.ofEpochMilli(ionValue.getMillis());
    }
}