Code Recipes Blog

In this post under DataMask, I will show with example how to do middle masking of a simple delimited text excluding masking of delimiter.

So if the text is “1111-2222-3333-4444”, the output should be “111*-****-**33-4444”

As you can see from the output the numbers are masked in the middle excluding delimiters.

Below is the complete main class for your reference

Example8

package core;
import io.github.freewarelabs.datamask.core.DataFormatType;
import io.github.freewarelabs.datamask.core.DataMaskManager;
import io.github.freewarelabs.datamask.core.MaskInformationDTO;
import io.github.freewarelabs.datamask.core.MaskType;
import io.github.freewarelabs.datamask.core.exception.DataMaskException;
public class Example8 {
    public static void main(String[] args) throws DataMaskException {
        MaskInformationDTO maskInformationDTO = MaskInformationDTO.builder()
                .maskType(MaskType.MIDDLE_MASKING)
                .delimiter("-")
                .leftCharacterCount(3)
                .rightCharacterCount(6)
                .dataFormatType(DataFormatType.TEXT).build();
        DataMaskManager dataMaskManager = new DataMaskManager();
        String result = dataMaskManager.maskText(maskInformationDTO, "1111-2222-3333-4444");
        System.out.println(result);
    }
}

In the above code, at line 11, I create and configure an instance of “MaskInformationDTO” class.

While configuring “MaskInformationDTO” instance I am setting the mask type to “MIDDLE_MASKING” and data format type as “TEXT”.

Please note I am also configuring delimiter by calling “delimiter” method.

This will tell “DataMaskManager” instance that the input data format is a simple text with delimiter and it has to mask in the middle excluding the delimiter “-“.

I also mentioned how much characters from the left should be excluded using “leftCharacterCount” method and how much characters from the right should be excluded using “rightCharacterCount” method.

At line 18, I create an instance of “DataMaskManager” class.

At line 19, I call non-static “maskText” method of “DataMaskManager” class and pass instance of “MaskInformationDTO” created at line 11 and actual text to be masked as an argument.

This method returns a masked text which is printed to the console.

Below is the output

Output

111*-****-**33-4444

In this way we can do middle masking of a simple delimited text excluding masking of delimiter.