/** objTypePair.getObject() must not be null */
@SuppressWarnings({"unchecked", "rawtypes"})
private JsonElement findAndInvokeCustomSerializer(ObjectTypePair objTypePair) {
Pair<JsonSerializer<?>, ObjectTypePair> pair = objTypePair.getMatchingHandler(serializers);
if (pair == null) {
return null;
}
JsonSerializer serializer = pair.first;
objTypePair = pair.second;
start(objTypePair);
try {
JsonElement element =
serializer.serialize(objTypePair.getObject(), objTypePair.getType(), context);
return element == null ? JsonNull.createJsonNull() : element;
} finally {
end(objTypePair);
}
}
private void addAsArrayElement(ObjectTypePair elementTypePair) {
if (elementTypePair.getObject() == null) {
root.getAsJsonArray().add(JsonNull.createJsonNull());
} else {
JsonElement childElement = getJsonElementForChild(elementTypePair);
root.getAsJsonArray().add(childElement);
}
}
/**
* Navigate all the fields of the specified object. If a field is null, it does not get visited.
*/
public void accept(Visitor visitor) {
TypeInfo objTypeInfo = new TypeInfo(objTypePair.type);
if (exclusionStrategy.shouldSkipClass(objTypeInfo.getRawClass())) {
return;
}
boolean visitedWithCustomHandler = visitor.visitUsingCustomHandler(objTypePair);
if (!visitedWithCustomHandler) {
Object obj = objTypePair.getObject();
Object objectToVisit = (obj == null) ? visitor.getTarget() : obj;
if (objectToVisit == null) {
return;
}
objTypePair.setObject(objectToVisit);
visitor.start(objTypePair);
try {
if (objTypeInfo.isArray()) {
visitor.visitArray(objectToVisit, objTypePair.type);
} else if (objTypeInfo.getActualType() == Object.class
&& isPrimitiveOrString(objectToVisit)) {
// TODO(Joel): this is only used for deserialization of "primitives"
// we should rethink this!!!
visitor.visitPrimitive(objectToVisit);
objectToVisit = visitor.getTarget();
} else {
visitor.startVisitingObject(objectToVisit);
ObjectTypePair currObjTypePair = objTypePair.toMoreSpecificType();
Class<?> topLevelClass = new TypeInfo(currObjTypePair.type).getRawClass();
for (Class<?> curr = topLevelClass;
curr != null && !curr.equals(Object.class);
curr = curr.getSuperclass()) {
if (!curr.isSynthetic()) {
navigateClassFields(objectToVisit, curr, visitor);
}
}
}
} finally {
visitor.end(objTypePair);
}
}
}
public boolean visitUsingCustomHandler(ObjectTypePair objTypePair) {
try {
Object obj = objTypePair.getObject();
if (obj == null) {
if (serializeNulls) {
assignToRoot(JsonNull.createJsonNull());
}
return true;
}
JsonElement element = findAndInvokeCustomSerializer(objTypePair);
if (element != null) {
assignToRoot(element);
return true;
}
return false;
} catch (CircularReferenceException e) {
throw e.createDetailedException(null);
}
}
