public static void getNGrams()

in archived/ModernizeYourDatabases2019/ModernizeSQL2019/Module 5 Activity - Modern Development Platform/java/Ngram.java [44:83]

25 lines of code
2 McCabe index (conditional complexity)


    public static void getNGrams() {

        System.out.println("inputDataCol1.length= "+ inputDataCol1.length);
        if (inputDataCol1.length == 0 ) {
            // TODO: Set empty return
            return;
        }
        //Using a stream to "loop" over the input data inputDataCol1.length. You can also use a for loop for this.
        final List<InputRow> inputDataSet = IntStream.range(0, inputDataCol1.length)
                .mapToObj(i -> new InputRow(inputDataCol1[i], inputDataCol2[i]))
                .collect(Collectors.toList());


        //Again, we are using a stream to loop over data
        final List<OutputRow> outputDataSet = inputDataSet.stream()
                // Generate ngrams of size n for each incoming string
                // Each invocation of ngrams returns a list. flatMap flattens
                // the resulting list-of-lists to a flat list.
                .flatMap(inputRow -> ngrams(param1, inputRow.text).stream().map(s -> new OutputRow(inputRow.id, s)))
                .collect(Collectors.toList());

        //Print the outputDataSet
        System.out.println(outputDataSet);

        //Set the number of rows and columns we will be returning
        numberOfOutputCols = 2;
        numberOfRows = outputDataSet.size();
        outputDataCol1 = new int[numberOfRows]; // ID column
        outputDataCol2 = new String[numberOfRows]; //The ngram column
        outputNullMap = new boolean[2][numberOfRows];// output null map

        //Since we don't have any null values, we will populate all values in the outputNullMap to false
        IntStream.range(0, numberOfRows).forEach(i -> {
            final OutputRow outputRow = outputDataSet.get(i);
            outputDataCol1[i] = outputRow.id;
            outputDataCol2[i] = outputRow.ngram;
            outputNullMap[0][i] = false;
            outputNullMap[1][i] = false;
        });
    }