/*
* 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.cassandra.db.marshal;
import java.nio.ByteBuffer;
import java.text.ParseException;
import java.util.Date;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.cql3.CQL3Type;
import org.apache.cassandra.serializers.TypeSerializer;
import org.apache.cassandra.serializers.MarshalException;
import org.apache.cassandra.serializers.TimestampSerializer;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.commons.lang.time.DateUtils;
/**
* Type for date-time values.
*
* This is meant as a replacement for DateType, as DateType wrongly compare
* pre-unix-epoch dates, sorting them *after* post-unix-epoch ones (due to it's
* use of unsigned bytes comparison).
*/
public class TimestampType extends AbstractType<Date>
{
private static final Logger logger = LoggerFactory.getLogger(TimestampType.class);
public static final TimestampType instance = new TimestampType();
private TimestampType() {} // singleton
public int compare(ByteBuffer o1, ByteBuffer o2)
{
return LongType.compareLongs(o1, o2);
}
public ByteBuffer fromString(String source) throws MarshalException
{
// Return an empty ByteBuffer for an empty string.
if (source.isEmpty())
return ByteBufferUtil.EMPTY_BYTE_BUFFER;
return ByteBufferUtil.bytes(dateStringToTimestamp(source));
}
public static long dateStringToTimestamp(String source) throws MarshalException
{
long millis;
if (source.toLowerCase().equals("now"))
{
millis = System.currentTimeMillis();
}
// Milliseconds since epoch?
else if (source.matches("^\\d+$"))
{
try
{
millis = Long.parseLong(source);
}
catch (NumberFormatException e)
{
throw new MarshalException(String.format("unable to make long (for date) from: '%s'", source), e);
}
}
// Last chance, attempt to parse as date-time string
else
{
try
{
millis = DateUtils.parseDateStrictly(source, TimestampSerializer.iso8601Patterns).getTime();
}
catch (ParseException e1)
{
throw new MarshalException(String.format("unable to coerce '%s' to a formatted date (long)", source), e1);
}
}
return millis;
}
@Override
public boolean isCompatibleWith(AbstractType<?> previous)
{
if (super.isCompatibleWith(previous))
return true;
if (previous instanceof DateType)
{
logger.warn("Changing from DateType to TimestampType is allowed, but be wary that they sort differently for pre-unix-epoch timestamps "
+ "(negative timestamp values) and thus this change will corrupt your data if you have such negative timestamp. So unless you "
+ "know that you don't have *any* pre-unix-epoch timestamp you should change back to DateType");
return true;
}
return false;
}
public CQL3Type asCQL3Type()
{
return CQL3Type.Native.TIMESTAMP;
}
public TypeSerializer<Date> getSerializer()
{
return TimestampSerializer.instance;
}
}