Class DoubleLastBufferAggregator
- java.lang.Object
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- org.apache.druid.query.aggregation.last.NumericLastBufferAggregator<BaseDoubleColumnValueSelector>
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- org.apache.druid.query.aggregation.last.DoubleLastBufferAggregator
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- All Implemented Interfaces:
BufferAggregator
,HotLoopCallee
public class DoubleLastBufferAggregator extends NumericLastBufferAggregator<BaseDoubleColumnValueSelector>
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Constructor Summary
Constructors Constructor Description DoubleLastBufferAggregator(BaseLongColumnValueSelector timeSelector, BaseDoubleColumnValueSelector valueSelector)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Object
get(ByteBuffer buf, int position)
Returns the intermediate object representation of the given aggregate.double
getDouble(ByteBuffer buf, int position)
Returns the double representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value.float
getFloat(ByteBuffer buf, int position)
Returns the float representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value.long
getLong(ByteBuffer buf, int position)
Returns the long representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value.-
Methods inherited from class org.apache.druid.query.aggregation.last.NumericLastBufferAggregator
aggregate, close, init, inspectRuntimeShape
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.druid.query.aggregation.BufferAggregator
isNull, relocate
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Constructor Detail
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DoubleLastBufferAggregator
public DoubleLastBufferAggregator(BaseLongColumnValueSelector timeSelector, BaseDoubleColumnValueSelector valueSelector)
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Method Detail
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get
public Object get(ByteBuffer buf, int position)
Description copied from interface:BufferAggregator
Returns the intermediate object representation of the given aggregate. Converts the given byte buffer representation into an intermediate aggregate Object Implementations must not change the position, limit or mark of the given buffer. The object returned must not have any references to the given buffer (i.e., make a copy), since the underlying buffer is a shared resource and may be given to another processing thread while the objects returned by this aggregator are still in use. If the correspondingAggregatorFactory.combine(Object, Object)
method for this aggregator expects its inputs to be mutable, then the object returned by this method must be mutable.- Parameters:
buf
- byte buffer storing the byte array representation of the aggregateposition
- offset within the byte buffer at which the aggregate value is stored- Returns:
- the Object representation of the aggregate
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getFloat
public float getFloat(ByteBuffer buf, int position)
Description copied from interface:BufferAggregator
Returns the float representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value. Implementations must not change the position, limit or mark of the given buffer Implementations are only required to support this method if they are aggregations which have anAggregatorFactory.getIntermediateType()
()} ofValueType.FLOAT
. If unimplemented, throwing anUnsupportedOperationException
is common and recommended.- Parameters:
buf
- byte buffer storing the byte array representation of the aggregateposition
- offset within the byte buffer at which the aggregate value is stored- Returns:
- the float representation of the aggregate
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getLong
public long getLong(ByteBuffer buf, int position)
Description copied from interface:BufferAggregator
Returns the long representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value. Implementations must not change the position, limit or mark of the given buffer Implementations are only required to support this method if they are aggregations which have anAggregatorFactory.getIntermediateType()
of ofValueType.LONG
. If unimplemented, throwing anUnsupportedOperationException
is common and recommended.- Parameters:
buf
- byte buffer storing the byte array representation of the aggregateposition
- offset within the byte buffer at which the aggregate value is stored- Returns:
- the long representation of the aggregate
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getDouble
public double getDouble(ByteBuffer buf, int position)
Description copied from interface:BufferAggregator
Returns the double representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value. Implementations must not change the position, limit or mark of the given buffer Implementations are only required to support this method if they are aggregations which have anAggregatorFactory.getIntermediateType()
of ofValueType.DOUBLE
. If unimplemented, throwing anUnsupportedOperationException
is common and recommended. The default implementation castsBufferAggregator.getFloat(ByteBuffer, int)
to double. This default method is added to enable smooth backward compatibility, please re-implement it if your aggregators work with numeric double columns.- Parameters:
buf
- byte buffer storing the byte array representation of the aggregateposition
- offset within the byte buffer at which the aggregate value is stored- Returns:
- the double representation of the aggregate
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