bson/src/main/org/bson/BSON.java
public static Object applyEncodingHooks(final Object objectToEncode) {
        Object transformedObject = objectToEncode;
        if (!hasEncodeHooks() || objectToEncode == null || encodingHooks.size() == 0) {
            return transformedObject;
        }
        List<Transformer> transformersForObject = encodingHooks.get(objectToEncode.getClass());
        if (transformersForObject != null) {
            for (final Transformer transformer : transformersForObject) {
                transformedObject = transformer.transform(objectToEncode);
            }
        }
        return transformedObject;
    }
public static Object applyEncodingHooks(final Object objectToEncode) {
        Object transformedObject = objectToEncode;
        if (!hasEncodeHooks() || objectToEncode == null || encodingHooks.size() == 0) {
            return transformedObject;
        }
        List<Transformer> transformersForObject = encodingHooks.get(objectToEncode.getClass());
        if (transformersForObject != null) {
            for (final Transformer transformer : transformersForObject) {
                transformedObject = transformer.transform(objectToEncode);
            }
        }
        return transformedObject;
    }
public static Object applyEncodingHooks ( final Object objectToEncode ) { Object transformedObject = objectToEncode ; if ( ! hasEncodeHooks ( ) || objectToEncode == null || encodingHooks . size ( ) == 0 ) { return transformedObject ; } List < Transformer > transformersForObject = encodingHooks . get ( objectToEncode . getClass ( ) ) ; if ( transformersForObject != null ) { for ( final Transformer transformer : transformersForObject ) { transformedObject = transformer . transform ( objectToEncode ) ; } } return transformedObject ; }
Transforms the {@code objectToEncode} using all transformers registered for the class of this object.

@param objectToEncode the object being written to BSON.
@return the transformed object
Transforms the { @code objectToEncode } using all transformers registered for the class of this object .