io.deephaven.engine.table.impl.updateby.rollingminmax.FloatRollingMinMaxOperator Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of deephaven-engine-table Show documentation
Engine Table: Implementation and closely-coupled utilities
There is a newer version: 0.37.1
Show newest version
/*
 * ---------------------------------------------------------------------------------------------------------------------
 * 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.AggregatingFloatRingBuffer;
import io.deephaven.base.verify.Assert;
import io.deephaven.chunk.FloatChunk;
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.BaseFloatUpdateByOperator;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import static io.deephaven.util.QueryConstants.NULL_FLOAT;

public class FloatRollingMinMaxOperator extends BaseFloatUpdateByOperator {
    private final boolean isMax;
    private static final int BUFFER_INITIAL_CAPACITY = 128;
    // region extra-fields
    // endregion extra-fields

    protected class Context extends BaseFloatUpdateByOperator.Context {
        protected FloatChunk floatInfluencerValuesChunk;
        protected AggregatingFloatRingBuffer aggMinMax;
        protected boolean evaluationNeeded;

        @SuppressWarnings("unused")
        protected Context(final int affectedChunkSize, final int influencerChunkSize) {
            super(affectedChunkSize);
            if (isMax) {
                aggMinMax = new AggregatingFloatRingBuffer(BUFFER_INITIAL_CAPACITY, NULL_FLOAT, (a, b) -> {
                    if (a == NULL_FLOAT) {
                        return b;
                    } else if (b == NULL_FLOAT) {
                        return a;
                    }
                    return (float)Math.max(a, b);
                });
            } else {
                aggMinMax = new AggregatingFloatRingBuffer(BUFFER_INITIAL_CAPACITY, Float.MAX_VALUE, (a, b) -> {
                    if (a == NULL_FLOAT) {
                        return b;
                    } else if (b == NULL_FLOAT) {
                        return a;
                    }
                    return (float)Math.min(a, b);
                });
            }
            curVal = isMax ? NULL_FLOAT : Float.MAX_VALUE;
            evaluationNeeded = false;
        }

        @Override
        public void close() {
            super.close();
            aggMinMax = null;
        }

        @Override
        public void setValueChunks(@NotNull final Chunk[] valueChunks) {
            floatInfluencerValuesChunk = valueChunks[0].asFloatChunk();
        }

        @Override
        public void push(int pos, int count) {
            aggMinMax.ensureRemaining(count);

            for (int ii = 0; ii < count; ii++) {
                float val = floatInfluencerValuesChunk.get(pos + ii);
                aggMinMax.addUnsafe(val);

                if (val == NULL_FLOAT) {
                    nullCount++;
                } else if (curVal == NULL_FLOAT) {
                    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(), "floatWindowValues.size()", count);

            for (int ii = 0; ii < count; ii++) {
                float val = aggMinMax.removeUnsafe();

                if (val == NULL_FLOAT) {
                    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_FLOAT;
            } else if (evaluationNeeded) {
                curVal = aggMinMax.evaluate();
            }
            outputValues.set(outIdx, curVal);
            evaluationNeeded = false;
        }

        @Override
        public void reset() {
            super.reset();
            aggMinMax.clear();
            curVal = isMax ? NULL_FLOAT : Float.MAX_VALUE;
            evaluationNeeded = false;
        }
    }

    @NotNull
    @Override
    public UpdateByOperator.Context makeUpdateContext(final int affectedChunkSize, final int influencerChunkSize) {
        return new Context(affectedChunkSize, influencerChunkSize);
    }

    public FloatRollingMinMaxOperator(
            @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 FloatRollingMinMaxOperator(
                pair,
                affectingColumns,
                timestampColumnName,
                reverseWindowScaleUnits,
                forwardWindowScaleUnits,
                isMax
                // region extra-copy-args
                // endregion extra-copy-args
        );
    }
}