@Override public JsonType visitDeclared(DeclaredType declaredType, Void o) { if (isJsonPrimitive(declaredType)) { // 'primitive'-ish things return new JsonPrimitive(declaredType.toString()); } else if (isInstanceOf(declaredType, Collection.class)) { if (declaredType.getTypeArguments().size() == 0) { return new JsonArray(new JsonPrimitive(Object.class.getName())); } else { TypeMirror elem = declaredType.getTypeArguments().get(0); return new JsonArray(elem.accept(this, o)); } } else if (isInstanceOf(declaredType, Map.class)) { if (declaredType.getTypeArguments().size() == 0) { return new JsonDict( new JsonPrimitive(Object.class.getName()), new JsonPrimitive(Object.class.getName())); } else { TypeMirror key = declaredType.getTypeArguments().get(0); TypeMirror val = declaredType.getTypeArguments().get(1); return new JsonDict(key.accept(this, o), val.accept(this, o)); } } else { TypeElement element = (TypeElement) declaredType.asElement(); if (element.getKind() == ElementKind.ENUM) { List<String> enumConstants = new ArrayList(); for (Element e : element.getEnclosedElements()) { if (e.getKind() == ElementKind.ENUM_CONSTANT) { enumConstants.add(e.toString()); } } JsonPrimitive primitive = new JsonPrimitive(String.class.getName()); // TODO is this always a string? primitive.setRestrictions(enumConstants); return primitive; } else { return buildType(declaredType, element); } } }