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Engine Table: Implementation and closely-coupled utilities
/*
* ---------------------------------------------------------------------------------------------------------------------
* AUTO-GENERATED CLASS - DO NOT EDIT MANUALLY - for any changes edit CharRollingAvgOperator and regenerate
* ---------------------------------------------------------------------------------------------------------------------
*/
package io.deephaven.engine.table.impl.updateby.rollingavg;
import io.deephaven.base.ringbuffer.ByteRingBuffer;
import io.deephaven.base.verify.Assert;
import io.deephaven.chunk.Chunk;
import io.deephaven.chunk.ByteChunk;
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.BaseDoubleUpdateByOperator;
import io.deephaven.engine.table.impl.util.RowRedirection;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import static io.deephaven.util.QueryConstants.*;
public class ByteRollingAvgOperator extends BaseDoubleUpdateByOperator {
private static final int BUFFER_INITIAL_CAPACITY = 128;
// region extra-fields
final byte nullValue;
// endregion extra-fields
protected class Context extends BaseDoubleUpdateByOperator.Context {
protected ByteChunk extends Values> influencerValuesChunk;
protected ByteRingBuffer byteWindowValues;
protected Context(final int affectedChunkSize, final int influencerChunkSize) {
super(affectedChunkSize);
byteWindowValues = new ByteRingBuffer(BUFFER_INITIAL_CAPACITY, true);
}
@Override
public void close() {
super.close();
byteWindowValues = null;
}
@Override
public void setValueChunks(@NotNull final Chunk extends Values>[] valueChunks) {
influencerValuesChunk = valueChunks[0].asByteChunk();
}
@Override
public void push(int pos, int count) {
byteWindowValues.ensureRemaining(count);
for (int ii = 0; ii < count; ii++) {
final byte val = influencerValuesChunk.get(pos + ii);
byteWindowValues.addUnsafe(val);
// increase the running sum
if (val != nullValue) {
if (curVal == NULL_DOUBLE) {
curVal = val;
} else {
curVal += val;
}
} else {
nullCount++;
}
}
}
@Override
public void pop(int count) {
Assert.geq(byteWindowValues.size(), "byteWindowValues.size()", count);
for (int ii = 0; ii < count; ii++) {
byte val = byteWindowValues.removeUnsafe();
// reduce the running sum
if (val != nullValue) {
curVal -= val;
} else {
nullCount--;
}
}
}
@Override
public void writeToOutputChunk(int outIdx) {
if (byteWindowValues.size() == 0) {
outputValues.set(outIdx, NULL_DOUBLE);
} else {
final int count = byteWindowValues.size() - nullCount;
if (count == 0) {
outputValues.set(outIdx, Double.NaN);
} else {
outputValues.set(outIdx, curVal / (double)count);
}
}
}
@Override
public void reset() {
super.reset();
byteWindowValues.clear();
}
}
@NotNull
@Override
public UpdateByOperator.Context makeUpdateContext(final int affectedChunkSize, final int influencerChunkSize) {
return new Context(affectedChunkSize, influencerChunkSize);
}
public ByteRollingAvgOperator(@NotNull final MatchPair pair,
@NotNull final String[] affectingColumns,
@Nullable final RowRedirection rowRedirection,
@Nullable final String timestampColumnName,
final long reverseWindowScaleUnits,
final long forwardWindowScaleUnits
// region extra-constructor-args
,final byte nullValue
// endregion extra-constructor-args
) {
super(pair, affectingColumns, rowRedirection, timestampColumnName, reverseWindowScaleUnits, forwardWindowScaleUnits, true);
// region constructor
this.nullValue = nullValue;
// endregion constructor
}
}
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