public static final class VarianceBufferAggregator.LongVarianceAggregator extends VarianceBufferAggregator
VarianceBufferAggregator.FloatVarianceAggregator, VarianceBufferAggregator.LongVarianceAggregator, VarianceBufferAggregator.ObjectVarianceAggregator
Constructor and Description |
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LongVarianceAggregator(BaseLongColumnValueSelector selector) |
Modifier and Type | Method and Description |
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void |
aggregate(ByteBuffer buf,
int position)
Aggregates metric values into the given aggregate byte representation
Implementations of this method must read in the aggregate value from the buffer at the given position,
aggregate the next element of data and write the updated aggregate value back into the buffer.
|
void |
inspectRuntimeShape(RuntimeShapeInspector inspector)
Implementations of this method should call
inspector.visit() with all fields of this class, which meet two
conditions:
1. |
close, get, getDouble, getFloat, getLong, init
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
relocate
public LongVarianceAggregator(BaseLongColumnValueSelector selector)
public void aggregate(ByteBuffer buf, int position)
BufferAggregator
buf
- byte buffer storing the byte array representation of the aggregateposition
- offset within the byte buffer at which the current aggregate value is storedpublic void inspectRuntimeShape(RuntimeShapeInspector inspector)
BufferAggregator
inspector.visit()
with all fields of this class, which meet two
conditions:
1. They are used in methods of this class, annotated with CalledFromHotLoop
2. They are either:
a. Nullable objects
b. Instances of HotLoopCallee
c. Objects, which don't always have a specific class in runtime. For example, a field of type Set
could be HashSet
or TreeSet
in runtime, depending on how
this instance (the instance on which inspectRuntimeShape() is called) is configured.
d. ByteBuffer or similar objects, where byte order matters
e. boolean flags, affecting branch taking
f. Arrays of objects, meeting any of conditions a-e.
The default implementation inspects nothing. Classes that implement BufferAggregator
are encouraged to
override this method, following the specification of HotLoopCallee.inspectRuntimeShape(io.druid.query.monomorphicprocessing.RuntimeShapeInspector)
.
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