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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.db.marshal;
import java.nio.ByteBuffer;
import java.util.Objects;
import org.apache.commons.lang3.mutable.MutableLong;
import org.apache.cassandra.cql3.CQL3Type;
import org.apache.cassandra.cql3.Constants;
import org.apache.cassandra.cql3.Term;
import org.apache.cassandra.cql3.functions.ArgumentDeserializer;
import org.apache.cassandra.serializers.TypeSerializer;
import org.apache.cassandra.serializers.LongSerializer;
import org.apache.cassandra.serializers.MarshalException;
import org.apache.cassandra.transport.ProtocolVersion;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.bytecomparable.ByteComparable;
import org.apache.cassandra.utils.bytecomparable.ByteSource;
import org.apache.cassandra.utils.bytecomparable.ByteSourceInverse;
public class LongType extends NumberType
{
public static final LongType instance = new LongType();
private static final ByteBuffer MASKED_VALUE = instance.decompose(0L);
LongType() {super(ComparisonType.CUSTOM);} // singleton
@Override
public boolean allowsEmpty()
{
return true;
}
@Override
public boolean isEmptyValueMeaningless()
{
return true;
}
public int compareCustom(VL left, ValueAccessor accessorL, VR right, ValueAccessor accessorR)
{
return compareLongs(left, accessorL, right, accessorR);
}
public static int compareLongs(VL left, ValueAccessor accessorL, VR right, ValueAccessor accessorR)
{
if (accessorL.isEmpty(left)|| accessorR.isEmpty(right))
return Boolean.compare(accessorR.isEmpty(right), accessorL.isEmpty(left));
int diff = accessorL.getByte(left, 0) - accessorR.getByte(right, 0);
if (diff != 0)
return diff;
return ValueAccessor.compare(left, accessorL, right, accessorR);
}
@Override
public ByteSource asComparableBytes(ValueAccessor accessor, V data, ByteComparable.Version version)
{
if (accessor.isEmpty(data))
return null;
if (version == ByteComparable.Version.LEGACY)
return ByteSource.signedFixedLengthNumber(accessor, data);
else
return ByteSource.variableLengthInteger(accessor.getLong(data, 0));
}
@Override
public V fromComparableBytes(ValueAccessor accessor, ByteSource.Peekable comparableBytes, ByteComparable.Version version)
{
if (comparableBytes == null)
return accessor.empty();
if (version == ByteComparable.Version.LEGACY)
return ByteSourceInverse.getSignedFixedLength(accessor, comparableBytes, 8);
else
return accessor.valueOf(ByteSourceInverse.getVariableLengthInteger(comparableBytes));
}
public ByteBuffer fromString(String source) throws MarshalException
{
// Return an empty ByteBuffer for an empty string.
if (source.isEmpty())
return ByteBufferUtil.EMPTY_BYTE_BUFFER;
long longType;
try
{
longType = Long.parseLong(source);
}
catch (Exception e)
{
throw new MarshalException(String.format("Unable to make long from '%s'", source), e);
}
return decompose(longType);
}
@Override
public Term fromJSONObject(Object parsed) throws MarshalException
{
try
{
if (parsed instanceof String)
return new Constants.Value(fromString((String) parsed));
Number parsedNumber = (Number) parsed;
if (!(parsedNumber instanceof Integer || parsedNumber instanceof Long))
throw new MarshalException(String.format("Expected a bigint value, but got a %s: %s", parsed.getClass().getSimpleName(), parsed));
return new Constants.Value(getSerializer().serialize(parsedNumber.longValue()));
}
catch (ClassCastException exc)
{
throw new MarshalException(String.format(
"Expected a bigint value, but got a %s: %s", parsed.getClass().getSimpleName(), parsed));
}
}
@Override
public String toJSONString(ByteBuffer buffer, ProtocolVersion protocolVersion)
{
return Objects.toString(getSerializer().deserialize(buffer), "\"\"");
}
@Override
public boolean isValueCompatibleWithInternal(AbstractType otherType)
{
return this == otherType || otherType == DateType.instance || otherType == TimestampType.instance;
}
public CQL3Type asCQL3Type()
{
return CQL3Type.Native.BIGINT;
}
public TypeSerializer getSerializer()
{
return LongSerializer.instance;
}
@Override
public ArgumentDeserializer getArgumentDeserializer()
{
return new NumberArgumentDeserializer(new MutableLong())
{
@Override
protected void setMutableValue(MutableLong mutable, ByteBuffer buffer)
{
mutable.setValue(ByteBufferUtil.toLong(buffer));
}
};
}
@Override
public int valueLengthIfFixed()
{
return 8;
}
@Override
public ByteBuffer add(Number left, Number right)
{
return ByteBufferUtil.bytes(left.longValue() + right.longValue());
}
@Override
public ByteBuffer substract(Number left, Number right)
{
return ByteBufferUtil.bytes(left.longValue() - right.longValue());
}
@Override
public ByteBuffer multiply(Number left, Number right)
{
return ByteBufferUtil.bytes(left.longValue() * right.longValue());
}
@Override
public ByteBuffer divide(Number left, Number right)
{
return ByteBufferUtil.bytes(left.longValue() / right.longValue());
}
@Override
public ByteBuffer mod(Number left, Number right)
{
return ByteBufferUtil.bytes(left.longValue() % right.longValue());
}
@Override
public ByteBuffer negate(Number input)
{
return ByteBufferUtil.bytes(-input.longValue());
}
@Override
public ByteBuffer abs(Number input)
{
return ByteBufferUtil.bytes(Math.abs(input.longValue()));
}
@Override
public ByteBuffer exp(Number input)
{
return ByteBufferUtil.bytes((long) Math.exp(input.longValue()));
}
@Override
public ByteBuffer log(Number input)
{
return ByteBufferUtil.bytes((long) Math.log(input.longValue()));
}
@Override
public ByteBuffer log10(Number input)
{
return ByteBufferUtil.bytes((long) Math.log10(input.longValue()));
}
@Override
public ByteBuffer round(Number input)
{
return decompose(input.longValue());
}
@Override
public ByteBuffer getMaskedValue()
{
return MASKED_VALUE;
}
}