org.apache.cassandra.db.marshal.DateType Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cassandra-all Show documentation
Show all versions of cassandra-all Show documentation
A fork of the Apache Cassandra Project ready to embed Elasticsearch.
/*
* 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.util.Date;
import org.apache.cassandra.cql3.Constants;
import org.apache.cassandra.cql3.Term;
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.TimestampSerializer;
import org.apache.cassandra.serializers.MarshalException;
import org.apache.cassandra.utils.ByteBufferUtil;
/**
* This is the old version of TimestampType, but has been replaced as it wasn't comparing pre-epoch timestamps
* correctly. This is kept for backward compatibility but shouldn't be used in new code.
*/
@Deprecated
public class DateType extends AbstractType
{
private static final Logger logger = LoggerFactory.getLogger(DateType.class);
public static final DateType instance = new DateType();
DateType() {super(ComparisonType.BYTE_ORDER);} // singleton
public boolean isEmptyValueMeaningless()
{
return true;
}
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(TimestampSerializer.dateStringToTimestamp(source));
}
@Override
public Term fromJSONObject(Object parsed) throws MarshalException
{
if (parsed instanceof Long)
return new Constants.Value(ByteBufferUtil.bytes((Long) parsed));
try
{
return new Constants.Value(TimestampType.instance.fromString((String) parsed));
}
catch (ClassCastException exc)
{
throw new MarshalException(String.format(
"Expected a long or a datestring representation of a date value, but got a %s: %s",
parsed.getClass().getSimpleName(), parsed));
}
}
@Override
public String toJSONString(ByteBuffer buffer, int protocolVersion)
{
return '"' + TimestampSerializer.getJsonDateFormatter().format(TimestampSerializer.instance.deserialize(buffer)) + '"';
}
@Override
public boolean isCompatibleWith(AbstractType previous)
{
if (super.isCompatibleWith(previous))
return true;
if (previous instanceof TimestampType)
{
logger.warn("Changing from TimestampType to DateType 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. There is no "
+ "reason to switch from DateType to TimestampType except if you were using DateType in the first place and switched to "
+ "TimestampType by mistake.");
return true;
}
return false;
}
@Override
public boolean isValueCompatibleWithInternal(AbstractType otherType)
{
return this == otherType || otherType == TimestampType.instance || otherType == LongType.instance;
}
@Override
public CQL3Type asCQL3Type()
{
return CQL3Type.Native.TIMESTAMP;
}
public TypeSerializer getSerializer()
{
return TimestampSerializer.instance;
}
@Override
protected int valueLengthIfFixed()
{
return 8;
}
}