How to use

clear

method

in

org.apache.arrow.vector.complex.UnionVector

@Override
public void clear() {
 data.clear();
}

public void load(UserBitShared.SerializedField metadata, ArrowBuf buffer) {
 /* clear the current buffers (if any) */
 unionVector.clear();
 unionVector.valueCount = metadata.getValueCount();
 int typesLength = metadata.getChild(0).getBufferLength();
 int mapLength = metadata.getChild(1).getBufferLength();
 loadTypeBuffer(metadata.getChild(0), buffer);
 TypeHelper.load(unionVector.internalStruct, metadata.getChild(1), buffer.slice(typesLength, mapLength));
}