Customize Jackson ObjectMapper to Read custom Annotation and mask fields annotated
<p>I have a requirement where I have created a Custom Annotation @MaskSensitiveData. I annotate sensitive fields. like</p>

<pre><code>class MyBean {
    String userName;
    @MaskSensitiveData
    String cardNumber;
    String abc;
    String xyz;
}

ObjectMapper mapper = new ObjectMapper();
    String json = null;
    AnnotationIntrospector primary = new JaxbAnnotationIntrospector();
    AnnotationIntrospector secondary = new JacksonAnnotationIntrospector();
    AnnotationIntrospector pair = new AnnotationIntrospectorPair(primary, secondary);
    mapper.setAnnotationIntrospector(pair);
    try {
        json = mapper.writeValueAsString(obj);
        /*
         * if(json != null ) { json = getLoggableString(json); }
         */
    } catch (Exception e) {
        return "Unable to convert to Json object:" + obj.toString() + " Message: " + e.getMessage();

    }
</code></pre>

<p>I am using Jackson ObjectMapper to convert objct to Json like.
<strong>I need to customize Object Mapper to mask cardNumber field in return json</strong>.
Please suggest a better way.</p>