io.deephaven.engine.table.impl.updateby.sum.CharCumSumOperator Maven / Gradle / Ivy

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package io.deephaven.engine.table.impl.updateby.sum;

import io.deephaven.base.verify.Assert;
import io.deephaven.chunk.CharChunk;
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 static io.deephaven.util.QueryConstants.NULL_CHAR;
import static io.deephaven.util.QueryConstants.NULL_LONG;

public class CharCumSumOperator extends BaseLongUpdateByOperator {
    // region extra-fields
    // endregion extra-fields

    protected class Context extends BaseLongUpdateByOperator.Context {
        public CharChunk charValueChunk;

        protected Context(final int chunkSize) {
            super(chunkSize);
        }

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

        @Override
        public void push(int pos, int count) {
            Assert.eq(count, "push count", 1);

            // read the value from the values chunk
            final char currentVal = charValueChunk.get(pos);

            if(curVal == NULL_LONG) {
                curVal = currentVal == NULL_CHAR ? NULL_LONG : currentVal;
            } else if (currentVal != NULL_CHAR) {
                curVal += currentVal;
            }
        }
    }

    public CharCumSumOperator(@NotNull final MatchPair pair
                              // region extra-constructor-args
                              // endregion extra-constructor-args
    ) {
        super(pair, new String[] { pair.rightColumn });
        // region constructor
        // endregion constructor
    }

    @Override
    public UpdateByOperator copy() {
        return new CharCumSumOperator(pair
              // region extra-copy-args
              // endregion extra-copy-args
        );
    }

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