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Engine Table: Implementation and closely-coupled utilities
/*
* ---------------------------------------------------------------------------------------------------------------------
* AUTO-GENERATED CLASS - DO NOT EDIT MANUALLY - for any changes edit CharRollingMinMaxOperator and regenerate
* ---------------------------------------------------------------------------------------------------------------------
*/
package io.deephaven.engine.table.impl.updateby.rollingminmax;
import io.deephaven.base.ringbuffer.AggregatingByteRingBuffer;
import io.deephaven.base.verify.Assert;
import io.deephaven.chunk.ByteChunk;
import io.deephaven.chunk.Chunk;
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.BaseByteUpdateByOperator;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import static io.deephaven.util.QueryConstants.NULL_BYTE;
public class ByteRollingMinMaxOperator extends BaseByteUpdateByOperator {
private final boolean isMax;
private static final int BUFFER_INITIAL_CAPACITY = 128;
// region extra-fields
// endregion extra-fields
protected class Context extends BaseByteUpdateByOperator.Context {
protected ByteChunk extends Values> byteInfluencerValuesChunk;
protected AggregatingByteRingBuffer aggMinMax;
protected boolean evaluationNeeded;
@SuppressWarnings("unused")
protected Context(final int affectedChunkSize, final int influencerChunkSize) {
super(affectedChunkSize);
if (isMax) {
aggMinMax = new AggregatingByteRingBuffer(BUFFER_INITIAL_CAPACITY, Byte.MIN_VALUE, (a, b) -> {
if (a == NULL_BYTE) {
return b;
} else if (b == NULL_BYTE) {
return a;
}
return (byte)Math.max(a, b);
});
} else {
aggMinMax = new AggregatingByteRingBuffer(BUFFER_INITIAL_CAPACITY, Byte.MAX_VALUE, (a, b) -> {
if (a == NULL_BYTE) {
return b;
} else if (b == NULL_BYTE) {
return a;
}
return (byte)Math.min(a, b);
});
}
curVal = isMax ? Byte.MIN_VALUE : Byte.MAX_VALUE;
evaluationNeeded = false;
}
@Override
public void close() {
super.close();
aggMinMax = null;
}
@Override
public void setValueChunks(@NotNull final Chunk extends Values>[] valueChunks) {
byteInfluencerValuesChunk = valueChunks[0].asByteChunk();
}
@Override
public void push(int pos, int count) {
aggMinMax.ensureRemaining(count);
for (int ii = 0; ii < count; ii++) {
byte val = byteInfluencerValuesChunk.get(pos + ii);
aggMinMax.addUnsafe(val);
if (val == NULL_BYTE) {
nullCount++;
} else if (curVal == NULL_BYTE) {
curVal = val;
evaluationNeeded = false;
} else if (isMax && curVal < val) {
curVal = val;
// Can skip evaluation when we push a new extreme.
evaluationNeeded = false;
} else if (!isMax && curVal > val) {
curVal = val;
// Can skip evaluation when we push a new extreme.
evaluationNeeded = false;
}
}
}
@Override
public void pop(int count) {
Assert.geq(aggMinMax.size(), "byteWindowValues.size()", count);
for (int ii = 0; ii < count; ii++) {
byte val = aggMinMax.removeUnsafe();
if (val == NULL_BYTE) {
nullCount--;
} else {
// Only revaluate if we pop something equal to our current value. Otherwise we have perfect
// confidence that the min/max is still in the window.
if (curVal == val) {
evaluationNeeded = true;
}
}
}
}
@Override
public void writeToOutputChunk(int outIdx) {
if (aggMinMax.size() == nullCount) {
curVal = NULL_BYTE;
} else if (evaluationNeeded) {
curVal = aggMinMax.evaluate();
}
outputValues.set(outIdx, curVal);
evaluationNeeded = false;
}
@Override
public void reset() {
super.reset();
aggMinMax.clear();
curVal = isMax ? Byte.MIN_VALUE : Byte.MAX_VALUE;
evaluationNeeded = false;
}
}
@NotNull
@Override
public UpdateByOperator.Context makeUpdateContext(final int affectedChunkSize, final int influencerChunkSize) {
return new Context(affectedChunkSize, influencerChunkSize);
}
public ByteRollingMinMaxOperator(
@NotNull final MatchPair pair,
@NotNull final String[] affectingColumns,
@Nullable final String timestampColumnName,
final long reverseWindowScaleUnits,
final long forwardWindowScaleUnits,
final boolean isMax
// region extra-constructor-args
// endregion extra-constructor-args
) {
super(pair, affectingColumns, timestampColumnName, reverseWindowScaleUnits, forwardWindowScaleUnits, true);
this.isMax = isMax;
// region constructor
// endregion constructor
}
@Override
public UpdateByOperator copy() {
return new ByteRollingMinMaxOperator(
pair,
affectingColumns,
timestampColumnName,
reverseWindowScaleUnits,
forwardWindowScaleUnits,
isMax
// region extra-copy-args
// endregion extra-copy-args
);
}
}
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