com.tales.storage.hbase.translators.DateTimeToBytesTranslator.java Source code

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Here is the source code for com.tales.storage.hbase.translators.DateTimeToBytesTranslator.java

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// ***************************************************************************
// *  Copyright 2012 Joseph Molnar
// *
// *  Licensed 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.tales.storage.hbase.translators;

import org.apache.hadoop.hbase.util.Bytes;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;

import com.tales.parts.translators.NullTranslatorBase;
import com.tales.parts.translators.TranslationException;
import com.tales.parts.translators.Translator;

public class DateTimeToBytesTranslator extends NullTranslatorBase implements Translator {
    private final boolean reverse;

    public DateTimeToBytesTranslator() {
        this(true, null);
    }

    public DateTimeToBytesTranslator(boolean toReverse) {
        this(toReverse, null);
    }

    public DateTimeToBytesTranslator(Object theNullValue) {
        this(true, theNullValue);
    }

    public DateTimeToBytesTranslator(boolean toReverse, Object theNullValue) {
        super(theNullValue);
        reverse = toReverse;
    }

    @Override
    public Object translate(Object anObject) {
        Object returnValue;
        if (anObject == null) {
            returnValue = this.nullValue;
        } else {
            try {
                DateTime dateTime = ((DateTime) anObject).toDateTime(DateTimeZone.UTC); // at least make it UTC if we are going to loose timezone
                long timestamp = reverse ? Long.MAX_VALUE - dateTime.getMillis() : dateTime.getMillis(); // NOTE: this looses timezone information
                returnValue = Bytes.toBytes(timestamp);
            } catch (ClassCastException e) {
                throw new TranslationException(e);
            }
        }
        return returnValue;
    }
}