io.deephaven.engine.table.impl.updateby.rollingcount.ByteRollingCountOperator Maven / Gradle / Ivy

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/*
 * ---------------------------------------------------------------------------------------------------------------------
 * AUTO-GENERATED CLASS - DO NOT EDIT MANUALLY - for any changes edit CharRollingCountOperator and regenerate
 * ---------------------------------------------------------------------------------------------------------------------
 */
package io.deephaven.engine.table.impl.updateby.rollingcount;

import io.deephaven.base.ringbuffer.ByteRingBuffer;
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.BaseLongUpdateByOperator;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

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

public class ByteRollingCountOperator extends BaseLongUpdateByOperator {
    private static final int BUFFER_INITIAL_CAPACITY = 128;
    // region extra-fields
    final byte nullValue;
    // endregion extra-fields

    protected class Context extends BaseLongUpdateByOperator.Context {
        protected ByteChunk influencerValuesChunk;
        protected ByteRingBuffer buffer;

        @SuppressWarnings("unused")
        protected Context(final int affectedChunkSize, final int influencerChunkSize) {
            super(affectedChunkSize);
            buffer = new ByteRingBuffer(BUFFER_INITIAL_CAPACITY, true);
        }

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

        @Override
        public void setValueChunks(@NotNull final Chunk[] valueChunks) {
            influencerValuesChunk = valueChunks[0].asByteChunk();
        }
        @Override
        public void push(int pos, int count) {
            buffer.ensureRemaining(count);

            for (int ii = 0; ii < count; ii++) {
                final byte val = influencerValuesChunk.get(pos + ii);

                if (val == nullValue) {
                    buffer.addUnsafe((byte) 0); // 0 signifies null
                    nullCount++;
                } else {
                    buffer.addUnsafe((byte) 1); // 1 signifies non-null
                }
            }
        }

        @Override
        public void pop(int count) {
            Assert.geq(buffer.size(), "byteWindowValues.size()", count);

            for (int ii = 0; ii < count; ii++) {
                final byte val = buffer.removeUnsafe();

                if (val == 0) {
                    nullCount--;
                }
            }
        }

        @Override
        public void writeToOutputChunk(int outIdx) {
            curVal = buffer.size() - nullCount;
            outputValues.set(outIdx, curVal);
        }

        @Override
        public void reset() {
            super.reset();
            buffer.clear();
        }
    }

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

    public ByteRollingCountOperator(
            @NotNull final MatchPair pair,
            @NotNull final String[] affectingColumns,
            @Nullable final String timestampColumnName,
            final long reverseWindowScaleUnits,
            final long forwardWindowScaleUnits
            // region extra-constructor-args
            ,final byte nullValue
            // endregion extra-constructor-args
    ) {
        super(pair, affectingColumns, timestampColumnName, reverseWindowScaleUnits, forwardWindowScaleUnits, true);
        // region constructor
        this.nullValue = nullValue;
        // endregion constructor
    }

    @Override
    public UpdateByOperator copy() {
        return new ByteRollingCountOperator(pair,
                affectingColumns,
                timestampColumnName,
                reverseWindowScaleUnits,
                forwardWindowScaleUnits
                // region extra-copy-args
                , nullValue
                // endregion extra-copy-args
        );
    }
}