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(String name);

Source Link

Document

Writes a JSON name/null value pair in an current object context.

Usage

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

private static void stringifyObject(JsonGenerator generator, BeanManager manager) {

    String keyName;//w ww.j  ava 2 s.c o m

    Field[] fields = manager.getFields();

    //Read every field and transform  it to a json property string
    for (Field field : fields) {
        Class fieldType = manager.getType(field.getName());
        keyName = field.getName();
        Object value = manager.getProperty(keyName);

        System.out.println("KeyName: " + keyName);
        System.out.println("Valor " + keyName + ": " + value);

        if (value == null) {
            //Set to null the property
            generator.writeNull(keyName);
            continue;
        }
        //Is a String
        if (fieldType == String.class) {
            generator.write(keyName, String.valueOf(value));
        } //Is a Date
        else if (fieldType == Date.class) {
            String date = DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.format(value);

            generator.write(keyName, date);

        } //Is a integer
        else if (fieldType == Integer.class || fieldType == Integer.TYPE) {
            generator.write(keyName, (int) value);
        } //Is a double
        else if (fieldType == Double.class || fieldType == Double.TYPE) {
            generator.write(keyName, (double) value);
        } //Is boolean
        else if (fieldType == Boolean.class || fieldType == Boolean.TYPE) {
            generator.write(keyName, (boolean) value);
        } //Is a collection
        else if (value 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);

            stringifyArray(generator, collectionManager);

            generator.writeEnd();
        } else {
            //Is a object... probably
            BeanManager objectManager = new BeanManager(value);

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

            stringifyObject(generator, objectManager);

            generator.writeEnd();
        }
    }

}

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From source file:com.mapr.data.sputnik.RandomJsonGenerator.java

private javax.json.stream.JsonGenerator addValue(javax.json.stream.JsonGenerator gen, String propName,
        Object val) {
    if (val == null) {
        gen.writeNull(propName);
    } else if (String.class.isAssignableFrom(val.getClass())) {
        if (propName != null) {
            gen.write(propName, (String) val);
        } else {//from w ww.ja v  a  2s. c  om
            gen.write((String) val);
        }
    } else if (Boolean.class.isAssignableFrom(val.getClass())) {
        gen.write(propName, (Boolean) val);
    } else if (Long.class.isAssignableFrom(val.getClass())) {
        gen.write(propName, (Long) val);
    } else if (Integer.class.isAssignableFrom(val.getClass())) {
        gen.write(propName, (Integer) val);
    } else if (Double.class.isAssignableFrom(val.getClass())) {
        gen.write(propName, (Double) val);
    } else if (Date.class.isAssignableFrom(val.getClass())) {
        gen.write(propName, iso8601DF.format((Date) val));
    }
    return gen;
}

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From source file:nl.nn.adapterframework.align.content.JsonDocumentContainer.java

protected void generate(JsonGenerator g, String key, Object item) {
    if (item == null) {
        if (key != null)
            g.writeNull(key);
        else/*from  w  w w  .  j  a v  a  2s  . c  o  m*/
            g.writeNull();
    } else if (item instanceof String) {
        if (key != null)
            g.write(key, (String) item);
        else
            g.write((String) item);
    } else if (item instanceof Map) {
        if (key != null)
            g.writeStartObject(key);
        else
            g.writeStartObject();
        for (Entry<String, Object> entry : ((Map<String, Object>) item).entrySet()) {
            generate(g, entry.getKey(), entry.getValue());
        }
        g.writeEnd();
    } else if (item instanceof List) {
        if (key != null)
            g.writeStartArray(key);
        else
            g.writeStartArray();
        for (Object subitem : (List) item) {
            generate(g, null, subitem);
        }
        g.writeEnd();
    } else {
        throw new NotImplementedException("cannot handle class [" + item.getClass().getName() + "]");
    }
}

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