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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* 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.cql3.functions;
import java.nio.ByteBuffer;
import java.util.Collection;
import java.util.Date;
import java.util.List;
import com.google.common.collect.ImmutableList;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.db.marshal.*;
import org.apache.cassandra.transport.ProtocolVersion;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.UUIDGen;
public abstract class TimeFcts
{
public static Logger logger = LoggerFactory.getLogger(TimeFcts.class);
public static Collection all()
{
return ImmutableList.of(nowFct,
minTimeuuidFct,
maxTimeuuidFct,
dateOfFct,
unixTimestampOfFct,
timeUuidtoDate,
timeUuidToTimestamp,
timeUuidToUnixTimestamp,
timestampToUnixTimestamp,
timestampToDate,
dateToUnixTimestamp,
dateToTimestamp);
}
public static final Function nowFct = new NativeScalarFunction("now", TimeUUIDType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
return ByteBuffer.wrap(UUIDGen.getTimeUUIDBytes());
}
};
public static final Function minTimeuuidFct = new NativeScalarFunction("mintimeuuid", TimeUUIDType.instance, TimestampType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
return UUIDGen.toByteBuffer(UUIDGen.minTimeUUID(TimestampType.instance.compose(bb).getTime()));
}
};
public static final Function maxTimeuuidFct = new NativeScalarFunction("maxtimeuuid", TimeUUIDType.instance, TimestampType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
return UUIDGen.toByteBuffer(UUIDGen.maxTimeUUID(TimestampType.instance.compose(bb).getTime()));
}
};
/**
* Function that convert a value of TIMEUUID into a value of type TIMESTAMP.
* @deprecated Replaced by the {@link #timeUuidToTimestamp} function
*/
public static final NativeScalarFunction dateOfFct = new NativeScalarFunction("dateof", TimestampType.instance, TimeUUIDType.instance)
{
private volatile boolean hasLoggedDeprecationWarning;
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
if (!hasLoggedDeprecationWarning)
{
hasLoggedDeprecationWarning = true;
logger.warn("The function 'dateof' is deprecated." +
" Use the function 'toTimestamp' instead.");
}
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
long timeInMillis = UUIDGen.unixTimestamp(UUIDGen.getUUID(bb));
return ByteBufferUtil.bytes(timeInMillis);
}
};
/**
* Function that convert a value of type TIMEUUID into an UNIX timestamp.
* @deprecated Replaced by the {@link #timeUuidToUnixTimestamp} function
*/
public static final NativeScalarFunction unixTimestampOfFct = new NativeScalarFunction("unixtimestampof", LongType.instance, TimeUUIDType.instance)
{
private volatile boolean hasLoggedDeprecationWarning;
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
if (!hasLoggedDeprecationWarning)
{
hasLoggedDeprecationWarning = true;
logger.warn("The function 'unixtimestampof' is deprecated." +
" Use the function 'toUnixTimestamp' instead.");
}
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
return ByteBufferUtil.bytes(UUIDGen.unixTimestamp(UUIDGen.getUUID(bb)));
}
};
/**
* Function that convert a value of TIMEUUID into a value of type DATE.
*/
public static final NativeScalarFunction timeUuidtoDate = new NativeScalarFunction("todate", SimpleDateType.instance, TimeUUIDType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
long timeInMillis = UUIDGen.unixTimestamp(UUIDGen.getUUID(bb));
return SimpleDateType.instance.fromTimeInMillis(timeInMillis);
}
};
/**
* Function that convert a value of type TIMEUUID into a value of type TIMESTAMP.
*/
public static final NativeScalarFunction timeUuidToTimestamp = new NativeScalarFunction("totimestamp", TimestampType.instance, TimeUUIDType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
long timeInMillis = UUIDGen.unixTimestamp(UUIDGen.getUUID(bb));
return TimestampType.instance.fromTimeInMillis(timeInMillis);
}
};
/**
* Function that convert a value of type TIMEUUID into an UNIX timestamp.
*/
public static final NativeScalarFunction timeUuidToUnixTimestamp = new NativeScalarFunction("tounixtimestamp", LongType.instance, TimeUUIDType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
return ByteBufferUtil.bytes(UUIDGen.unixTimestamp(UUIDGen.getUUID(bb)));
}
};
/**
* Function that convert a value of type TIMESTAMP into an UNIX timestamp.
*/
public static final NativeScalarFunction timestampToUnixTimestamp = new NativeScalarFunction("tounixtimestamp", LongType.instance, TimestampType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
Date date = TimestampType.instance.compose(bb);
return date == null ? null : ByteBufferUtil.bytes(date.getTime());
}
};
/**
* Function that convert a value of type TIMESTAMP into a DATE.
*/
public static final NativeScalarFunction timestampToDate = new NativeScalarFunction("todate", SimpleDateType.instance, TimestampType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
Date date = TimestampType.instance.compose(bb);
return date == null ? null : SimpleDateType.instance.fromTimeInMillis(date.getTime());
}
};
/**
* Function that convert a value of type TIMESTAMP into a DATE.
*/
public static final NativeScalarFunction dateToTimestamp = new NativeScalarFunction("totimestamp", TimestampType.instance, SimpleDateType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
long millis = SimpleDateType.instance.toTimeInMillis(bb);
return TimestampType.instance.fromTimeInMillis(millis);
}
};
/**
* Function that convert a value of type DATE into an UNIX timestamp.
*/
public static final NativeScalarFunction dateToUnixTimestamp = new NativeScalarFunction("tounixtimestamp", LongType.instance, SimpleDateType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null)
return null;
return ByteBufferUtil.bytes(SimpleDateType.instance.toTimeInMillis(bb));
}
};
}