@SuppressWarnings("unchecked")
    @Override
    public Object parse(SourceData sourceData, int rowIndex, Context context) {
        Object arrayObj = arrayParser.parse(sourceData, rowIndex, context);
        Object elementObj = elementParser.parse(sourceData, rowIndex, context);
        if (arrayObj == null) {
            return null;
        }
        if (arrayObj instanceof ArrayList) {
            ArrayList<Object> array = (ArrayList<Object>) arrayObj;
            if (array.isEmpty()) {
                return null;
            }
            array.add(elementObj);
            return array;
        }
        return null;
    }
ArrayAppendFunction  ->  ARRAY_APPEND(array, element)
description:
- Return NULL if either argument is NULL
- Return the result of appends an element to the end of the 'array'
inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/collection/ArrayAppendFunction.java