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Engine Table: Implementation and closely-coupled utilities
/*
* ---------------------------------------------------------------------------------------------------------------------
* AUTO-GENERATED CLASS - DO NOT EDIT MANUALLY - for any changes edit CharRollingSumOperator and regenerate
* ---------------------------------------------------------------------------------------------------------------------
*/
package io.deephaven.engine.table.impl.updateby.rollingsum;
import io.deephaven.base.ringbuffer.LongRingBuffer;
import io.deephaven.base.verify.Assert;
import io.deephaven.chunk.Chunk;
import io.deephaven.chunk.LongChunk;
import io.deephaven.chunk.attributes.Values;
import io.deephaven.engine.table.impl.MatchPair;
import io.deephaven.engine.table.impl.updateby.UpdateByOperator;
import io.deephaven.engine.table.impl.updateby.internal.BaseLongUpdateByOperator;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import static io.deephaven.util.QueryConstants.*;
public class LongRollingSumOperator extends BaseLongUpdateByOperator {
private static final int RING_BUFFER_INITIAL_CAPACITY = 512;
// region extra-fields
// endregion extra-fields
protected class Context extends BaseLongUpdateByOperator.Context {
protected LongChunk extends Values> longInfluencerValuesChunk;
protected LongRingBuffer longWindowValues;
protected Context(final int chunkSize) {
super(chunkSize);
longWindowValues = new LongRingBuffer(RING_BUFFER_INITIAL_CAPACITY, true);
}
@Override
public void close() {
super.close();
longWindowValues = null;
}
@Override
public void setValueChunks(@NotNull final Chunk extends Values>[] valueChunks) {
longInfluencerValuesChunk = valueChunks[0].asLongChunk();
}
@Override
public void push(int pos, int count) {
longWindowValues.ensureRemaining(count);
for (int ii = 0; ii < count; ii++) {
long val = longInfluencerValuesChunk.get(pos + ii);
longWindowValues.addUnsafe(val);
// increase the running sum
if (val != NULL_LONG) {
if (curVal == NULL_LONG) {
curVal = val;
} else {
curVal += val;
}
} else {
nullCount++;
}
}
}
@Override
public void pop(int count) {
Assert.geq(longWindowValues.size(), "longWindowValues.size()", count);
for (int ii = 0; ii < count; ii++) {
long val = longWindowValues.removeUnsafe();
// reduce the running sum
if (val != NULL_LONG) {
curVal -= val;
} else {
nullCount--;
}
}
}
@Override
public void writeToOutputChunk(int outIdx) {
if (longWindowValues.size() == nullCount) {
outputValues.set(outIdx, NULL_LONG);
} else {
outputValues.set(outIdx, curVal);
}
}
@Override
public void reset() {
super.reset();
longWindowValues.clear();
}
}
@NotNull
@Override
public UpdateByOperator.Context makeUpdateContext(final int affectedChunkSize, final int influencerChunkSize) {
return new Context(affectedChunkSize);
}
public LongRollingSumOperator(
@NotNull final MatchPair pair,
@NotNull final String[] affectingColumns,
@Nullable final String timestampColumnName,
final long reverseWindowScaleUnits,
final long forwardWindowScaleUnits
// region extra-constructor-args
// endregion extra-constructor-args
) {
super(pair, affectingColumns, timestampColumnName, reverseWindowScaleUnits, forwardWindowScaleUnits, true);
// region constructor
// endregion constructor
}
@Override
public UpdateByOperator copy() {
return new LongRollingSumOperator(
pair,
affectingColumns,
timestampColumnName,
reverseWindowScaleUnits,
forwardWindowScaleUnits
// region extra-copy-args
// endregion extra-copy-args
);
}
}
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