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Kafka: Integrating Engine tables with Kafka

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//
// Copyright (c) 2016-2024 Deephaven Data Labs and Patent Pending
//
package io.deephaven.kafka.ingest;

import io.deephaven.chunk.ChunkType;
import io.deephaven.chunk.ObjectChunk;
import io.deephaven.chunk.WritableChunk;
import io.deephaven.chunk.attributes.Values;

/**
 * Copy fields from a chunk of Kafka key or value objects to a chunk that will be published to a blink table.
 */
public interface FieldCopier {
    /**
     * Copy fields from a chunk of Kafka key or value objects to a chunk that will be published to a blink table.
     * 
     * @param inputChunk the chunk containing Kafka keys or values
     * @param publisherChunk the output chunk for the provided field
     * @param sourceOffset the source chunk offset
     * @param destOffset the destination chunk offset
     * @param length the length to copy
     */
    void copyField(
            ObjectChunk inputChunk,
            WritableChunk publisherChunk,
            int sourceOffset,
            int destOffset,
            int length);

    interface Factory {
        FieldCopier make(String fieldName, ChunkType chunkType, Class dataType, Class componentType);
    }
}