Example usage for javax.json.stream JsonGenerator writeNull

Introduction

In this page you can find the example usage for javax.json.stream JsonGenerator writeNull.

Prototype

JsonGenerator writeNull();

Source Link

Document

Writes a JSON null value within the current array, field or root context.

Usage

From source file:iing.uabc.edu.mx.persistencia.util.JSON.java

public static void stringifyArray(JsonGenerator generator, CollectionManager manager) {

    //Get size of the array to start stringifying elements
    //Note that the elements of this array has to be of the same class
    Collection collection = manager.getCollection();
    Class elementType = manager.getElementClass();

    System.out.println("Coleccion de tamanio " + collection.size());

    int i = 0;//from   w  ww  .  j  a va  2  s  .  c  om
    //Read every element and transform  it to a json array element string
    for (Iterator it = collection.iterator(); it.hasNext();) {
        Object element = it.next();

        System.out.println("Elemento: [" + i + "], Valor: " + element);

        if (element == null) {
            //Set to null the property
            generator.writeNull();
            continue;
        }

        //Is a String
        if (elementType == String.class) {
            generator.write(String.valueOf(element));
        } //Is a Date
        else if (elementType == Date.class) {
            String date = DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.format(element);

            generator.write(date);

        } //Is a integer
        else if (elementType == Integer.class || elementType == Integer.TYPE) {
            generator.write((int) element);
        } //Is a double
        else if (elementType == Double.class || elementType == Double.TYPE) {
            generator.write((double) element);
        } //Is boolean
        else if (elementType == Boolean.class || elementType == Boolean.TYPE) {
            generator.write((boolean) element);

        } //Is a collection (Not implemented)
        else if (element instanceof Collection) {
            //                Class elementClass = manager.getCollectionElementType(keyName);
            //
            //                System.out.println("Nueva Colleccion [] de clase: "
            //                        + elementClass.getSimpleName());
            //
            //                generator.writeStartArray(keyName);
            //
            //                //Create new collection manager with the given class
            //                CollectionManager collectionManager
            //                        = new CollectionManager((Collection) value, elementClass);
            //
            //                generator.writeEnd();
        } else {
            //Is a object... probably
            BeanManager objectManager = new BeanManager(element);

            System.out.println("Nuevo Objecto {}: " + element.getClass().getSimpleName());
            generator.writeStartObject();

            stringifyObject(generator, objectManager);

            generator.writeEnd();
        }
    }
}

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