/*
* 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.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<Function> all()
{
return ImmutableList.of(now("now", TimeUUIDType.instance),
now("currenttimeuuid", TimeUUIDType.instance),
now("currenttimestamp", TimestampType.instance),
now("currentdate", SimpleDateType.instance),
now("currenttime", TimeType.instance),
minTimeuuidFct,
maxTimeuuidFct,
dateOfFct,
unixTimestampOfFct,
toDate(TimeUUIDType.instance),
toTimestamp(TimeUUIDType.instance),
toUnixTimestamp(TimeUUIDType.instance),
toUnixTimestamp(TimestampType.instance),
toDate(SimpleDateType.instance),
toUnixTimestamp(SimpleDateType.instance),
toTimestamp(SimpleDateType.instance));
}
public static final Function now(final String name, final TemporalType<?> type)
{
return new NativeScalarFunction(name, type)
{
@Override
public ByteBuffer execute(ProtocolVersion protocolVersion, List<ByteBuffer> parameters)
{
return type.now();
}
};
};
public static final Function minTimeuuidFct = new NativeScalarFunction("mintimeuuid", TimeUUIDType.instance, TimestampType.instance)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List<ByteBuffer> 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<ByteBuffer> 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 <code>TIMEUUID</code> into a value of type <code>TIMESTAMP</code>.
* @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<ByteBuffer> 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 <code>TIMEUUID</code> 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<ByteBuffer> 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)));
}
};
/**
* Creates a function that convert a value of the specified type into a <code>DATE</code>.
* @param type the temporal type
* @return a function that convert a value of the specified type into a <code>DATE</code>.
*/
public static final NativeScalarFunction toDate(final TemporalType<?> type)
{
return new NativeScalarFunction("todate", SimpleDateType.instance, type)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List<ByteBuffer> parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null || !bb.hasRemaining())
return null;
long millis = type.toTimeInMillis(bb);
return SimpleDateType.instance.fromTimeInMillis(millis);
}
};
}
/**
* Creates a function that convert a value of the specified type into a <code>TIMESTAMP</code>.
* @param type the temporal type
* @return a function that convert a value of the specified type into a <code>TIMESTAMP</code>.
*/
public static final NativeScalarFunction toTimestamp(final TemporalType<?> type)
{
return new NativeScalarFunction("totimestamp", TimestampType.instance, type)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List<ByteBuffer> parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null || !bb.hasRemaining())
return null;
long millis = type.toTimeInMillis(bb);
return TimestampType.instance.fromTimeInMillis(millis);
}
};
}
/**
* Creates a function that convert a value of the specified type into an UNIX timestamp.
* @param type the temporal type
* @return a function that convert a value of the specified type into an UNIX timestamp.
*/
public static final NativeScalarFunction toUnixTimestamp(final TemporalType<?> type)
{
return new NativeScalarFunction("tounixtimestamp", LongType.instance, type)
{
public ByteBuffer execute(ProtocolVersion protocolVersion, List<ByteBuffer> parameters)
{
ByteBuffer bb = parameters.get(0);
if (bb == null || !bb.hasRemaining())
return null;
return ByteBufferUtil.bytes(type.toTimeInMillis(bb));
}
};
}
}