private <T extends Annotation> T findAnnotationOnMethodOrEnclosingType(
final JMethod method, final Class<T> annotationType) {
T annotation = method.getAnnotation(annotationType);
if (annotation == null) {
annotation = method.getEnclosingType().getAnnotation(annotationType);
}
return annotation;
}
private String getRestMethod(JMethod method) throws UnableToCompleteException {
String restMethod = null;
if (method.getAnnotation(DELETE.class) != null) {
restMethod = METHOD_DELETE;
} else if (method.getAnnotation(GET.class) != null) {
restMethod = METHOD_GET;
} else if (method.getAnnotation(HEAD.class) != null) {
restMethod = METHOD_HEAD;
} else if (method.getAnnotation(OPTIONS.class) != null) {
restMethod = METHOD_OPTIONS;
} else if (method.getAnnotation(POST.class) != null) {
restMethod = METHOD_POST;
} else if (method.getAnnotation(PUT.class) != null) {
restMethod = METHOD_PUT;
} else if (method.getAnnotation(JSONP.class) != null) {
restMethod = METHOD_JSONP;
} else {
restMethod = method.getName();
if (!REST_METHODS.contains(restMethod)) {
getLogger()
.log(
ERROR,
"Invalid rest method. It must either have a lower case rest method name or have a javax rs method annotation: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
}
return restMethod;
}
private void writeSubresourceLocatorImpl(JMethod method) throws UnableToCompleteException {
JClassType iface = method.getReturnType().isInterface();
if (iface == null || !REST_SERVICE_TYPE.isAssignableFrom(iface)) {
getLogger()
.log(
ERROR,
"Invalid subresource locator method. Method must have return type of an interface that extends RestService: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
Path pathAnnotation = method.getAnnotation(Path.class);
if (pathAnnotation == null) {
getLogger()
.log(
ERROR,
"Invalid subresource locator method. Method must have @Path annotation: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
String pathExpression = wrap(pathAnnotation.value());
for (JParameter arg : method.getParameters()) {
PathParam paramPath = arg.getAnnotation(PathParam.class);
if (paramPath != null) {
pathExpression = pathExpression(pathExpression, arg, paramPath);
}
}
p(method.getReadableDeclaration(false, false, false, false, true) + " {").i(1);
{
JType type = method.getReturnType();
String name;
if (type instanceof JClassType) {
JClassType restService = (JClassType) type;
RestServiceClassCreator generator =
new RestServiceClassCreator(getLogger(), context, restService);
name = generator.create();
} else {
throw new UnsupportedOperationException("Subresource method may not return: " + type);
}
p(method.getReturnType().getQualifiedSourceName() + " __subresource = new " + name + "();");
p(
"(("
+ RestServiceProxy.class.getName()
+ ")__subresource).setResource(getResource().resolve("
+ pathExpression
+ "));");
p("return __subresource;");
}
i(-1).p("}");
}
private void writeMethodImpl(JMethod method) throws UnableToCompleteException {
boolean returnRequest = false;
if (method.getReturnType() != JPrimitiveType.VOID) {
if (!method.getReturnType().getQualifiedSourceName().equals(Request.class.getName())
&& !method
.getReturnType()
.getQualifiedSourceName()
.equals(JsonpRequest.class.getName())) {
getLogger()
.log(
ERROR,
"Invalid rest method. Method must have void, Request or JsonpRequest return types: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
} else {
returnRequest = true;
}
}
Json jsonAnnotation = source.getAnnotation(Json.class);
final Style classStyle = jsonAnnotation != null ? jsonAnnotation.style() : Style.DEFAULT;
Options classOptions = source.getAnnotation(Options.class);
Options options = method.getAnnotation(Options.class);
p(method.getReadableDeclaration(false, false, false, false, true) + " {").i(1);
{
String restMethod = getRestMethod(method);
LinkedList<JParameter> args =
new LinkedList<JParameter>(Arrays.asList(method.getParameters()));
// the last arg should be the callback.
if (args.isEmpty()) {
getLogger()
.log(
ERROR,
"Invalid rest method. Method must declare at least a callback argument: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
JParameter callbackArg = args.removeLast();
JClassType callbackType = callbackArg.getType().isClassOrInterface();
JClassType methodCallbackType = METHOD_CALLBACK_TYPE;
if (callbackType == null || !callbackType.isAssignableTo(methodCallbackType)) {
getLogger()
.log(
ERROR,
"Invalid rest method. Last argument must be a "
+ methodCallbackType.getName()
+ " type: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
JClassType resultType = getCallbackTypeGenericClass(callbackType);
String pathExpression = null;
Path pathAnnotation = method.getAnnotation(Path.class);
if (pathAnnotation != null) {
pathExpression = wrap(pathAnnotation.value());
}
JParameter contentArg = null;
HashMap<String, JParameter> queryParams = new HashMap<String, JParameter>();
HashMap<String, JParameter> formParams = new HashMap<String, JParameter>();
HashMap<String, JParameter> headerParams = new HashMap<String, JParameter>();
for (JParameter arg : args) {
PathParam paramPath = arg.getAnnotation(PathParam.class);
if (paramPath != null) {
if (pathExpression == null) {
getLogger()
.log(
ERROR,
"Invalid rest method. Invalid @PathParam annotation. Method is missing the @Path annotation: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
pathExpression = pathExpression(pathExpression, arg, paramPath);
// .replaceAll(Pattern.quote("{" + paramPath.value() + "}"),
// "\"+com.google.gwt.http.client.URL.encodePathSegment(" + toStringExpression(arg) +
// ")+\"");
if (arg.getAnnotation(Attribute.class) != null) {
// allow part of the arg-object participate in as PathParam and the object goes over the
// wire
contentArg = arg;
}
continue;
}
QueryParam queryParam = arg.getAnnotation(QueryParam.class);
if (queryParam != null) {
queryParams.put(queryParam.value(), arg);
continue;
}
FormParam formParam = arg.getAnnotation(FormParam.class);
if (formParam != null) {
formParams.put(formParam.value(), arg);
continue;
}
HeaderParam headerParam = arg.getAnnotation(HeaderParam.class);
if (headerParam != null) {
headerParams.put(headerParam.value(), arg);
continue;
}
if (!formParams.isEmpty()) {
getLogger()
.log(
ERROR,
"You can not have both @FormParam parameters and a content parameter: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
if (contentArg != null) {
getLogger()
.log(
ERROR,
"Invalid rest method. Only one content parameter is supported: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
contentArg = arg;
}
String acceptTypeBuiltIn = null;
if (callbackType.equals(TEXT_CALLBACK_TYPE)) {
acceptTypeBuiltIn = "CONTENT_TYPE_TEXT";
} else if (callbackType.equals(JSON_CALLBACK_TYPE)) {
acceptTypeBuiltIn = "CONTENT_TYPE_JSON";
} else if (callbackType.isAssignableTo(OVERLAY_CALLBACK_TYPE)) {
acceptTypeBuiltIn = "CONTENT_TYPE_JSON";
} else if (callbackType.equals(XML_CALLBACK_TYPE)) {
acceptTypeBuiltIn = "CONTENT_TYPE_XML";
}
p("final " + METHOD_CLASS + " __method =");
p("getResource()");
if (pathExpression != null) {
p(".resolve(" + pathExpression + ")");
}
for (Map.Entry<String, JParameter> entry : queryParams.entrySet()) {
String expr = entry.getValue().getName();
JClassType type = entry.getValue().getType().isClassOrInterface();
if (type != null && isQueryParamListType(type)) {
p(
".addQueryParams("
+ wrap(entry.getKey())
+ ", "
+ toIteratedStringExpression(entry.getValue())
+ ")");
} else {
p(
".addQueryParam("
+ wrap(entry.getKey())
+ ", "
+ toStringExpression(entry.getValue().getType(), expr)
+ ")");
}
}
// example: .get()
p("." + restMethod + "();");
// Handle JSONP specific configuration...
JSONP jsonpAnnotation = method.getAnnotation(JSONP.class);
final boolean isJsonp = restMethod.equals(METHOD_JSONP) && jsonpAnnotation != null;
if (isJsonp) {
if (returnRequest
&& !method
.getReturnType()
.getQualifiedSourceName()
.equals(JsonpRequest.class.getName())) {
getLogger()
.log(
ERROR,
"Invalid rest method. JSONP method must have void or JsonpRequest return types: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
if (jsonpAnnotation.callbackParam().length() > 0) {
p(
"(("
+ JSONP_METHOD_CLASS
+ ")__method).callbackParam("
+ wrap(jsonpAnnotation.callbackParam())
+ ");");
}
if (jsonpAnnotation.failureCallbackParam().length() > 0) {
p(
"(("
+ JSONP_METHOD_CLASS
+ ")__method).failureCallbackParam("
+ wrap(jsonpAnnotation.failureCallbackParam())
+ ");");
}
} else {
if (returnRequest
&& !method.getReturnType().getQualifiedSourceName().equals(Request.class.getName())) {
getLogger()
.log(
ERROR,
"Invalid rest method. Non JSONP method must have void or Request return types: "
+ method.getReadableDeclaration());
throw new UnableToCompleteException();
}
}
// configure the dispatcher
if (options != null && options.dispatcher() != Dispatcher.class) {
// use the dispatcher configured for the method.
p("__method.setDispatcher(" + options.dispatcher().getName() + ".INSTANCE);");
} else {
// use the default dispatcher configured for the service..
p("__method.setDispatcher(this.dispatcher);");
}
// configure the expected statuses..
if (options != null && options.expect().length != 0) {
// Using method level defined expected status
p("__method.expect(" + join(options.expect(), ", ") + ");");
} else if (classOptions != null && classOptions.expect().length != 0) {
// Using class level defined expected status
p("__method.expect(" + join(classOptions.expect(), ", ") + ");");
}
// configure the timeout
if (options != null && options.timeout() >= 0) {
// Using method level defined value
p("__method.timeout(" + options.timeout() + ");");
} else if (classOptions != null && classOptions.timeout() >= 0) {
// Using class level defined value
p("__method.timeout(" + classOptions.timeout() + ");");
}
if (jsonpAnnotation == null) {
Produces producesAnnotation = findAnnotationOnMethodOrEnclosingType(method, Produces.class);
if (producesAnnotation != null) {
p(
"__method.header("
+ RESOURCE_CLASS
+ ".HEADER_ACCEPT, "
+ wrap(producesAnnotation.value()[0])
+ ");");
} else {
// set the default accept header....
if (acceptTypeBuiltIn != null) {
p(
"__method.header("
+ RESOURCE_CLASS
+ ".HEADER_ACCEPT, "
+ RESOURCE_CLASS
+ "."
+ acceptTypeBuiltIn
+ ");");
} else {
p(
"__method.header("
+ RESOURCE_CLASS
+ ".HEADER_ACCEPT, "
+ RESOURCE_CLASS
+ ".CONTENT_TYPE_JSON);");
}
}
Consumes consumesAnnotation = findAnnotationOnMethodOrEnclosingType(method, Consumes.class);
if (consumesAnnotation != null) {
p(
"__method.header("
+ RESOURCE_CLASS
+ ".HEADER_CONTENT_TYPE, "
+ wrap(consumesAnnotation.value()[0])
+ ");");
}
// and set the explicit headers now (could override the accept header)
for (Map.Entry<String, JParameter> entry : headerParams.entrySet()) {
String expr = entry.getValue().getName();
p(
"__method.header("
+ wrap(entry.getKey())
+ ", "
+ toStringExpression(entry.getValue().getType(), expr)
+ ");");
}
}
if (!formParams.isEmpty()) {
p(FORM_POST_CONTENT_CLASS + " __formPostContent = new " + FORM_POST_CONTENT_CLASS + "();");
for (Map.Entry<String, JParameter> entry : formParams.entrySet()) {
p(
"__formPostContent.addParameter("
+ wrap(entry.getKey())
+ ", "
+ toFormStringExpression(entry.getValue(), classStyle)
+ ");");
}
p("__method.form(__formPostContent.getTextContent());");
}
if (contentArg != null) {
if (contentArg.getType() == STRING_TYPE) {
p("__method.text(" + contentArg.getName() + ");");
} else if (contentArg.getType() == JSON_VALUE_TYPE) {
p("__method.json(" + contentArg.getName() + ");");
} else if (contentArg.getType().isClass() != null
&& isOverlayArrayType(contentArg.getType().isClass())) {
p("__method.json(new " + JSON_ARRAY_CLASS + "(" + contentArg.getName() + "));");
} else if (contentArg.getType().isClass() != null
&& contentArg.getType().isClass().isAssignableTo(OVERLAY_VALUE_TYPE)) {
p("__method.json(new " + JSON_OBJECT_CLASS + "(" + contentArg.getName() + "));");
} else if (contentArg.getType() == DOCUMENT_TYPE) {
p("__method.xml(" + contentArg.getName() + ");");
} else {
JClassType contentClass = contentArg.getType().isClass();
if (contentClass == null) {
contentClass = contentArg.getType().isClassOrInterface();
if (!locator.isCollectionType(contentClass)) {
getLogger().log(ERROR, "Content argument must be a class.");
throw new UnableToCompleteException();
}
}
jsonAnnotation = contentArg.getAnnotation(Json.class);
Style style = jsonAnnotation != null ? jsonAnnotation.style() : classStyle;
// example:
// .json(Listings$_Generated_JsonEncoder_$.INSTANCE.encode(arg0)
// )
p(
"__method.json("
+ locator.encodeExpression(contentClass, contentArg.getName(), style)
+ ");");
}
}
List<AnnotationResolver> annotationResolvers = getAnnotationResolvers(context, getLogger());
getLogger()
.log(
TreeLogger.DEBUG,
"found " + annotationResolvers.size() + " additional AnnotationResolvers");
for (AnnotationResolver a : annotationResolvers) {
getLogger()
.log(
TreeLogger.DEBUG,
"("
+ a.getClass().getName()
+ ") resolve `"
+ source.getName()
+ "#"
+ method.getName()
+ "´ ...");
final Map<String, String[]> addDataParams =
a.resolveAnnotation(getLogger(), source, method, restMethod);
if (addDataParams != null) {
for (String s : addDataParams.keySet()) {
final StringBuilder sb = new StringBuilder();
final List<String> classList = Arrays.asList(addDataParams.get(s));
sb.append("[");
for (int i = 0; i < classList.size(); ++i) {
sb.append("\\\"").append(classList.get(i)).append("\\\"");
if ((i + 1) < classList.size()) {
sb.append(",");
}
}
sb.append("]");
getLogger()
.log(TreeLogger.DEBUG, "add call with (\"" + s + "\", \"" + sb.toString() + "\")");
p("__method.addData(\"" + s + "\", \"" + sb.toString() + "\");");
}
}
}
if (acceptTypeBuiltIn != null) {
// TODO: shouldn't we also have a cach in here?
p(returnRequest(returnRequest, isJsonp) + "__method.send(" + callbackArg.getName() + ");");
} else if (isJsonp) {
p(returnRequest(returnRequest, isJsonp)
+ "(("
+ JSONP_METHOD_CLASS
+ ")__method).send(new "
+ ABSTRACT_ASYNC_CALLBACK_CLASS
+ "<"
+ resultType.getParameterizedQualifiedSourceName()
+ ">(("
+ JSONP_METHOD_CLASS
+ ")__method, "
+ callbackArg.getName()
+ ") {")
.i(1);
{
p("protected "
+ resultType.getParameterizedQualifiedSourceName()
+ " parseResult("
+ JSON_VALUE_CLASS
+ " result) throws Exception {")
.i(1);
{
if (resultType.getParameterizedQualifiedSourceName().equals("java.lang.Void")) {
p("return (java.lang.Void) null;");
} else {
p("try {").i(1);
{
if (resultType.isAssignableTo(locator.LIST_TYPE)) {
p("result = new " + JSON_ARRAY_CLASS + "(result.getJavaScriptObject());");
}
jsonAnnotation = method.getAnnotation(Json.class);
Style style = jsonAnnotation != null ? jsonAnnotation.style() : classStyle;
p("return " + locator.decodeExpression(resultType, "result", style) + ";");
}
i(-1).p("} catch (Throwable __e) {").i(1);
{
p(
"throw new "
+ RESPONSE_FORMAT_EXCEPTION_CLASS
+ "(\"Response was NOT a valid JSON document\", __e);");
}
i(-1).p("}");
}
}
i(-1).p("}");
}
i(-1).p("});");
} else {
p("try {").i(1);
{
p(returnRequest(returnRequest, isJsonp)
+ "__method.send(new "
+ ABSTRACT_REQUEST_CALLBACK_CLASS
+ "<"
+ resultType.getParameterizedQualifiedSourceName()
+ ">(__method, "
+ callbackArg.getName()
+ ") {")
.i(1);
{
p("protected "
+ resultType.getParameterizedQualifiedSourceName()
+ " parseResult() throws Exception {")
.i(1);
{
if (resultType.getParameterizedQualifiedSourceName().equals("java.lang.Void")) {
p("return (java.lang.Void) null;");
} else {
p("try {").i(1);
{
jsonAnnotation = method.getAnnotation(Json.class);
Style style = jsonAnnotation != null ? jsonAnnotation.style() : classStyle;
p(
"return "
+ locator.decodeExpression(
resultType,
JSON_PARSER_CLASS + ".parse(__method.getResponse().getText())",
style)
+ ";");
}
i(-1).p("} catch (Throwable __e) {").i(1);
{
p(
"throw new "
+ RESPONSE_FORMAT_EXCEPTION_CLASS
+ "(\"Response was NOT a valid JSON document\", __e);");
}
i(-1).p("}");
}
}
i(-1).p("}");
}
i(-1).p("});");
}
i(-1).p("} catch (" + REQUEST_EXCEPTION_CLASS + " __e) {").i(1);
{
p(callbackArg.getName() + ".onFailure(__method,__e);");
if (returnRequest) {
p("return null;");
}
}
i(-1).p("}");
}
}
i(-1).p("}");
}
@Override
protected void generate() throws UnableToCompleteException {
if (source.isInterface() == null) {
getLogger().log(ERROR, "Type is not an interface.");
throw new UnableToCompleteException();
}
locator = new JsonEncoderDecoderInstanceLocator(context, getLogger());
this.XML_CALLBACK_TYPE = find(XmlCallback.class, getLogger(), context);
this.METHOD_CALLBACK_TYPE = find(MethodCallback.class, getLogger(), context);
this.TEXT_CALLBACK_TYPE = find(TextCallback.class, getLogger(), context);
this.JSON_CALLBACK_TYPE = find(JsonCallback.class, getLogger(), context);
this.OVERLAY_CALLBACK_TYPE = find(OverlayCallback.class, getLogger(), context);
this.DOCUMENT_TYPE = find(Document.class, getLogger(), context);
this.METHOD_TYPE = find(Method.class, getLogger(), context);
this.STRING_TYPE = find(String.class, getLogger(), context);
this.JSON_VALUE_TYPE = find(JSONValue.class, getLogger(), context);
this.OVERLAY_VALUE_TYPE = find(JavaScriptObject.class, getLogger(), context);
this.OVERLAY_ARRAY_TYPES = new HashSet<JClassType>();
this.OVERLAY_ARRAY_TYPES.add(find(JsArray.class, getLogger(), context));
this.OVERLAY_ARRAY_TYPES.add(find(JsArrayBoolean.class, getLogger(), context));
this.OVERLAY_ARRAY_TYPES.add(find(JsArrayInteger.class, getLogger(), context));
this.OVERLAY_ARRAY_TYPES.add(find(JsArrayNumber.class, getLogger(), context));
this.OVERLAY_ARRAY_TYPES.add(find(JsArrayString.class, getLogger(), context));
this.QUERY_PARAM_LIST_TYPES = new HashSet<JClassType>();
this.QUERY_PARAM_LIST_TYPES.add(find(List.class, getLogger(), context));
this.QUERY_PARAM_LIST_TYPES.add(find(Set.class, getLogger(), context));
this.REST_SERVICE_TYPE = find(RestService.class, getLogger(), context);
String path = null;
Path pathAnnotation = source.getAnnotation(Path.class);
if (pathAnnotation != null) {
path = pathAnnotation.value();
}
RemoteServiceRelativePath relativePath = source.getAnnotation(RemoteServiceRelativePath.class);
if (relativePath != null) {
path = relativePath.value();
}
p("private " + RESOURCE_CLASS + " resource = null;");
p();
p("public void setResource(" + RESOURCE_CLASS + " resource) {").i(1);
{
p("this.resource = resource;");
}
i(-1).p("}");
p("public " + RESOURCE_CLASS + " getResource() {").i(1);
{
p("if (this.resource == null) {").i(1);
if (path == null) {
p("this.resource = new " + RESOURCE_CLASS + "(" + DEFAULTS_CLASS + ".getServiceRoot());");
} else {
p(
"this.resource = new "
+ RESOURCE_CLASS
+ "("
+ DEFAULTS_CLASS
+ ".getServiceRoot()).resolve("
+ quote(path)
+ ");");
}
i(-1).p("}");
p("return this.resource;");
}
i(-1).p("}");
Options options = source.getAnnotation(Options.class);
if (options != null && options.dispatcher() != Dispatcher.class) {
p(
"private "
+ DISPATCHER_CLASS
+ " dispatcher = "
+ options.dispatcher().getName()
+ ".INSTANCE;");
} else {
p("private " + DISPATCHER_CLASS + " dispatcher = null;");
}
p();
p("public void setDispatcher(" + DISPATCHER_CLASS + " dispatcher) {").i(1);
{
p("this.dispatcher = dispatcher;");
}
i(-1).p("}");
p();
p("public " + DISPATCHER_CLASS + " getDispatcher() {").i(1);
{
p("return this.dispatcher;");
}
i(-1).p("}");
for (JMethod method : source.getInheritableMethods()) {
JClassType iface = method.getReturnType().isInterface();
if (iface != null && REST_SERVICE_TYPE.isAssignableFrom(iface))
writeSubresourceLocatorImpl(method);
else writeMethodImpl(method);
}
}