use of com.google.api.generator.engine.ast.Statement in project gapic-generator-java by googleapis.
the class GrpcServiceStubClassComposer method createMethodDescriptorVariableDecl.
@Override
protected Statement createMethodDescriptorVariableDecl(Service service, Method protoMethod, VariableExpr methodDescriptorVarExpr, Map<String, Message> messageTypes) {
MethodInvocationExpr methodDescriptorMaker = MethodInvocationExpr.builder().setMethodName("newBuilder").setStaticReferenceType(FIXED_GRPC_TYPE_STORE.get("MethodDescriptor")).setGenerics(methodDescriptorVarExpr.variable().type().reference().generics()).build();
BiFunction<String, Expr, Function<MethodInvocationExpr, MethodInvocationExpr>> methodMakerFn = (mName, argExpr) -> m -> MethodInvocationExpr.builder().setMethodName(mName).setArguments(Arrays.asList(argExpr)).setExprReferenceExpr(m).build();
methodDescriptorMaker = methodMakerFn.apply("setType", getMethodDescriptorMethodTypeExpr(protoMethod)).apply(methodDescriptorMaker);
String codeMethodNameArg = getProtoRpcFullMethodName(service, protoMethod);
methodDescriptorMaker = methodMakerFn.apply("setFullMethodName", ValueExpr.withValue(StringObjectValue.withValue(codeMethodNameArg))).apply(methodDescriptorMaker);
Function<MethodInvocationExpr, MethodInvocationExpr> protoUtilsMarshallerFn = m -> MethodInvocationExpr.builder().setStaticReferenceType(FIXED_GRPC_TYPE_STORE.get("ProtoUtils")).setMethodName("marshaller").setArguments(Arrays.asList(m)).build();
MethodInvocationExpr methodInvocationArg = MethodInvocationExpr.builder().setMethodName("getDefaultInstance").setStaticReferenceType(protoMethod.inputType()).build();
methodDescriptorMaker = methodMakerFn.apply("setRequestMarshaller", protoUtilsMarshallerFn.apply(methodInvocationArg)).apply(methodDescriptorMaker);
methodInvocationArg = MethodInvocationExpr.builder().setMethodName("getDefaultInstance").setStaticReferenceType(protoMethod.outputType()).build();
methodDescriptorMaker = methodMakerFn.apply("setResponseMarshaller", protoUtilsMarshallerFn.apply(methodInvocationArg)).apply(methodDescriptorMaker);
methodDescriptorMaker = MethodInvocationExpr.builder().setMethodName("build").setExprReferenceExpr(methodDescriptorMaker).setReturnType(methodDescriptorVarExpr.type()).build();
return ExprStatement.withExpr(AssignmentExpr.builder().setVariableExpr(methodDescriptorVarExpr.toBuilder().setIsDecl(true).setScope(ScopeNode.PRIVATE).setIsStatic(true).setIsFinal(true).build()).setValueExpr(methodDescriptorMaker).build());
}
use of com.google.api.generator.engine.ast.Statement in project gapic-generator-java by googleapis.
the class HttpJsonServiceCallableFactoryClassComposer method createOperationCallableMethod.
@Override
protected MethodDefinition createOperationCallableMethod(Service service, TypeStore typeStore) {
String methodVariantName = "Operation";
String requestTemplateName = "RequestT";
String responseTemplateName = "ResponseT";
List<String> methodTemplateNames = Arrays.asList(requestTemplateName, responseTemplateName, "MetadataT");
// Always add @BetaApi annotation to the generated createOperationCallable() method for now,
// until LRO is fully implemented.
//
// Remove the @BetaApi annotation once the LRO feature is fully implemented and stabilized.
AnnotationNode betaAnnotation = AnnotationNode.withTypeAndDescription(typeStore.get("BetaApi"), "The surface for long-running operations is not stable yet and may change in the" + " future.");
// Generate generic method without the body
TypeNode operationType = service.operationType();
if (operationType == null) {
operationType = DEFAULT_OPERATION_TYPE;
}
MethodDefinition method = createGenericCallableMethod(service, typeStore, /*methodTemplateNames=*/
methodTemplateNames, /*returnCallableKindName=*/
methodVariantName, /*returnCallableTemplateNames=*/
methodTemplateNames, /*methodVariantName=*/
methodVariantName, /*httpJsonCallSettingsTemplateObjects=*/
Arrays.asList(requestTemplateName, operationType), /*callSettingsVariantName=*/
methodVariantName, /*callSettingsTemplateObjects=*/
methodTemplateNames.stream().map(n -> (Object) n).collect(Collectors.toList()), Arrays.asList(betaAnnotation));
List<Statement> createOperationCallableBody = new ArrayList<>();
List<VariableExpr> arguments = new ArrayList<>(method.arguments());
Variable httpJsonCallSettingsVar = arguments.get(0).variable();
Variable operationCallSettingsVar = arguments.get(1).variable();
Variable clientContextVar = arguments.get(2).variable();
Variable operationsStubVar = arguments.get(3).variable();
// Generate innerCallable
VariableExpr innerCallableVarExpr = VariableExpr.builder().setVariable(Variable.builder().setName("innerCallable").setType(TypeNode.withReference(ConcreteReference.withClazz(UnaryCallable.class))).build()).setTemplateObjects(Arrays.asList(requestTemplateName, methodVariantName)).build();
MethodInvocationExpr getInitialCallSettingsExpr = MethodInvocationExpr.builder().setExprReferenceExpr(VariableExpr.withVariable(operationCallSettingsVar)).setMethodName("getInitialCallSettings").build();
MethodInvocationExpr createBaseUnaryCallableExpr = MethodInvocationExpr.builder().setStaticReferenceType(TypeNode.withReference(ConcreteReference.withClazz(HttpJsonCallableFactory.class))).setMethodName("createBaseUnaryCallable").setArguments(VariableExpr.withVariable(httpJsonCallSettingsVar), getInitialCallSettingsExpr, VariableExpr.withVariable(clientContextVar)).setReturnType(TypeNode.withReference(ConcreteReference.withClazz(UnaryCallable.class))).build();
AssignmentExpr innerCallableAssignExpr = AssignmentExpr.builder().setVariableExpr(innerCallableVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(createBaseUnaryCallableExpr).build();
createOperationCallableBody.add(ExprStatement.withExpr(innerCallableAssignExpr));
// This is a temporary solution
VaporReference requestT = VaporReference.builder().setName("RequestT").setPakkage(service.pakkage() + ".stub").build();
TypeNode initialCallableType = TypeNode.withReference(ConcreteReference.builder().setClazz(HttpJsonOperationSnapshotCallable.class).setGenerics(requestT, operationType.reference()).build());
// Generate initialCallable
VariableExpr initialCallableVarExpr = VariableExpr.builder().setVariable(Variable.builder().setName("initialCallable").setType(initialCallableType).build()).build();
MethodInvocationExpr getMethodDescriptorExpr = MethodInvocationExpr.builder().setExprReferenceExpr(VariableExpr.withVariable(httpJsonCallSettingsVar)).setMethodName("getMethodDescriptor").build();
MethodInvocationExpr getOperationSnapshotFactoryExpr = MethodInvocationExpr.builder().setExprReferenceExpr(getMethodDescriptorExpr).setMethodName("getOperationSnapshotFactory").build();
TypeNode operationSnapshotCallableType = TypeNode.withReference(ConcreteReference.builder().setClazz(HttpJsonOperationSnapshotCallable.class).setGenerics(requestT, operationType.reference()).build());
NewObjectExpr initialCallableObject = NewObjectExpr.builder().setType(operationSnapshotCallableType).setIsGeneric(true).setArguments(innerCallableVarExpr, getOperationSnapshotFactoryExpr).build();
AssignmentExpr initialCallableAssignExpr = AssignmentExpr.builder().setVariableExpr(initialCallableVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(initialCallableObject).build();
createOperationCallableBody.add(ExprStatement.withExpr(initialCallableAssignExpr));
// Generate return statement
MethodInvocationExpr longRunningClient = MethodInvocationExpr.builder().setExprReferenceExpr(VariableExpr.withVariable(operationsStubVar)).setMethodName("longRunningClient").build();
MethodInvocationExpr createOperationCallable = MethodInvocationExpr.builder().setStaticReferenceType(TypeNode.withReference(ConcreteReference.withClazz(HttpJsonCallableFactory.class))).setMethodName("createOperationCallable").setArguments(VariableExpr.withVariable(operationCallSettingsVar), VariableExpr.withVariable(clientContextVar), longRunningClient, initialCallableVarExpr).setReturnType(TypeNode.withReference(ConcreteReference.withClazz(OperationCallable.class))).build();
// Add body and return statement to method
return method.toBuilder().setBody(createOperationCallableBody).setReturnExpr(createOperationCallable).build();
}
use of com.google.api.generator.engine.ast.Statement in project gapic-generator-java by googleapis.
the class ServiceClientCallableMethodSampleComposer method composeLroCallableMethod.
// Compose sample code for the method where it is CallableMethodKind.LRO.
public static Sample composeLroCallableMethod(Method method, TypeNode clientType, Map<String, ResourceName> resourceNames, Map<String, Message> messageTypes) {
VariableExpr clientVarExpr = VariableExpr.withVariable(Variable.builder().setName(JavaStyle.toLowerCamelCase(clientType.reference().name())).setType(clientType).build());
// Assign method's request variable with the default value.
VariableExpr requestVarExpr = VariableExpr.withVariable(Variable.builder().setName("request").setType(method.inputType()).build());
Message requestMessage = messageTypes.get(method.inputType().reference().fullName());
Preconditions.checkNotNull(requestMessage, String.format("Could not find the message type %s.", method.inputType().reference().fullName()));
Expr requestBuilderExpr = DefaultValueComposer.createSimpleMessageBuilderValue(requestMessage, resourceNames, messageTypes);
AssignmentExpr requestAssignmentExpr = AssignmentExpr.builder().setVariableExpr(requestVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(requestBuilderExpr).build();
List<Expr> bodyExprs = new ArrayList<>();
bodyExprs.add(requestAssignmentExpr);
// Create OperationFuture variable expr with invoking client's LRO callable method.
// e.g. OperationFuture<Empty, WaitMetadata> future =
// echoClient.waitOperationCallable().futureCall(request);
TypeNode operationFutureType = TypeNode.withReference(ConcreteReference.builder().setClazz(OperationFuture.class).setGenerics(method.lro().responseType().reference(), method.lro().metadataType().reference()).build());
VariableExpr operationFutureVarExpr = VariableExpr.withVariable(Variable.builder().setName("future").setType(operationFutureType).build());
MethodInvocationExpr rpcMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(clientVarExpr).setMethodName(String.format("%sOperationCallable", JavaStyle.toLowerCamelCase(method.name()))).build();
rpcMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(rpcMethodInvocationExpr).setMethodName("futureCall").setArguments(requestVarExpr).setReturnType(operationFutureType).build();
bodyExprs.add(AssignmentExpr.builder().setVariableExpr(operationFutureVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(rpcMethodInvocationExpr).build());
List<Statement> bodyStatements = bodyExprs.stream().map(e -> ExprStatement.withExpr(e)).collect(Collectors.toList());
bodyExprs.clear();
// Add a line comment
bodyStatements.add(CommentStatement.withComment(LineComment.withComment("Do something.")));
// Assign response variable with invoking client's LRO method.
// e.g. if return void, future.get(); or,
// e.g. if return other type, WaitResponse response = future.get();
MethodInvocationExpr futureGetMethodExpr = MethodInvocationExpr.builder().setExprReferenceExpr(operationFutureVarExpr).setMethodName("get").setReturnType(method.lro().responseType()).build();
boolean returnsVoid = method.lro().responseType().isProtoEmptyType();
if (returnsVoid) {
bodyExprs.add(futureGetMethodExpr);
} else {
VariableExpr responseVarExpr = VariableExpr.builder().setVariable(Variable.builder().setName("response").setType(method.lro().responseType()).build()).setIsDecl(true).build();
bodyExprs.add(AssignmentExpr.builder().setVariableExpr(responseVarExpr).setValueExpr(futureGetMethodExpr).build());
}
bodyStatements.addAll(bodyExprs.stream().map(e -> ExprStatement.withExpr(e)).collect(Collectors.toList()));
bodyExprs.clear();
RegionTag regionTag = RegionTag.builder().setServiceName(clientType.reference().name()).setRpcName(method.name()).setIsAsynchronous(true).setOverloadDisambiguation("LRO").build();
List<Statement> body = Arrays.asList(TryCatchStatement.builder().setTryResourceExpr(SampleComposerUtil.assignClientVariableWithCreateMethodExpr(clientVarExpr)).setTryBody(bodyStatements).setIsSampleCode(true).build());
return Sample.builder().setBody(body).setRegionTag(regionTag).build();
}
use of com.google.api.generator.engine.ast.Statement in project gapic-generator-java by googleapis.
the class ServiceClientCallableMethodSampleComposer method composeStreamServerSample.
private static Sample composeStreamServerSample(Method method, VariableExpr clientVarExpr, AssignmentExpr requestAssignmentExpr) {
List<Expr> bodyExprs = new ArrayList<>();
bodyExprs.add(requestAssignmentExpr);
// Create server stream variable expression, and assign it a value by invoking server stream
// method.
// e.g. ServerStream<EchoResponse> stream = echoClient.expandCallable().call(request)
TypeNode serverStreamType = TypeNode.withReference(ConcreteReference.builder().setClazz(ServerStream.class).setGenerics(method.outputType().reference()).build());
VariableExpr serverStreamVarExpr = VariableExpr.withVariable(Variable.builder().setName("stream").setType(serverStreamType).build());
MethodInvocationExpr clientStreamCallMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(clientVarExpr).setMethodName(JavaStyle.toLowerCamelCase(String.format("%sCallable", method.name()))).build();
clientStreamCallMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(clientStreamCallMethodInvocationExpr).setMethodName("call").setArguments(requestAssignmentExpr.variableExpr().toBuilder().setIsDecl(false).build()).setReturnType(serverStreamType).build();
AssignmentExpr streamAssignmentExpr = AssignmentExpr.builder().setVariableExpr(serverStreamVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(clientStreamCallMethodInvocationExpr).build();
bodyExprs.add(streamAssignmentExpr);
List<Statement> bodyStatements = bodyExprs.stream().map(e -> ExprStatement.withExpr(e)).collect(Collectors.toList());
// For-loop on server stream variable expression.
// e.g. for (EchoResponse response : stream) {
// // Do something when a response is received.
// }
VariableExpr responseVarExpr = VariableExpr.builder().setVariable(Variable.builder().setName("response").setType(method.outputType()).build()).setIsDecl(true).build();
ForStatement forStatement = ForStatement.builder().setLocalVariableExpr(responseVarExpr).setCollectionExpr(serverStreamVarExpr).setBody(Arrays.asList(CommentStatement.withComment(LineComment.withComment("Do something when a response is received.")))).build();
bodyStatements.add(forStatement);
RegionTag regionTag = RegionTag.builder().setServiceName(clientVarExpr.variable().identifier().name()).setRpcName(method.name()).setIsAsynchronous(true).build();
return Sample.builder().setBody(bodyStatements).setRegionTag(regionTag).build();
}
use of com.google.api.generator.engine.ast.Statement in project gapic-generator-java by googleapis.
the class ServiceClientCallableMethodSampleComposer method composePagedCallableSample.
private static Sample composePagedCallableSample(Method method, VariableExpr clientVarExpr, VariableExpr requestVarExpr, Map<String, Message> messageTypes) {
// Find the repeated field.
Message methodOutputMessage = messageTypes.get(method.outputType().reference().fullName());
Field repeatedPagedResultsField = methodOutputMessage.findAndUnwrapPaginatedRepeatedField();
Preconditions.checkNotNull(repeatedPagedResultsField, String.format("No repeated field found on message %s for method %s", methodOutputMessage.name(), method.name()));
TypeNode repeatedResponseType = repeatedPagedResultsField.type();
// Assign future variable by invoking paged callable method.
// e.g. ApiFuture<PagedExpandPagedResponse> future =
// echoClient.pagedExpandCallable().futureCall(request);
VariableExpr responseVarExpr = VariableExpr.withVariable(Variable.builder().setName("response").setType(method.outputType()).build());
MethodInvocationExpr pagedCallableMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(clientVarExpr).setMethodName(JavaStyle.toLowerCamelCase(String.format("%sCallable", method.name()))).build();
pagedCallableMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(pagedCallableMethodInvocationExpr).setMethodName("call").setArguments(requestVarExpr).setReturnType(method.outputType()).build();
AssignmentExpr responseAssignmentExpr = AssignmentExpr.builder().setVariableExpr(responseVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(pagedCallableMethodInvocationExpr).build();
List<Statement> whileBodyStatements = new ArrayList<>();
whileBodyStatements.add(ExprStatement.withExpr(responseAssignmentExpr));
// For-loop on repeated response elements.
// e.g. for (EchoResponse element : response.getResponsesList()) {
// // doThingsWith(element);
// }
VariableExpr repeatedResponseVarExpr = VariableExpr.withVariable(Variable.builder().setName("element").setType(repeatedResponseType).build());
MethodInvocationExpr getResponseListMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(responseVarExpr).setMethodName("getResponsesList").build();
ForStatement responseForStatements = ForStatement.builder().setLocalVariableExpr(repeatedResponseVarExpr.toBuilder().setIsDecl(true).build()).setCollectionExpr(getResponseListMethodInvocationExpr).setBody(Arrays.asList(CommentStatement.withComment(LineComment.withComment("doThingsWith(element);")))).build();
whileBodyStatements.add(responseForStatements);
// Create nextPageToken variable expression and assign it with a value by invoking
// getNextPageToken method.
// e.g. String nextPageToken = response.getNextPageToken();
VariableExpr nextPageTokenVarExpr = VariableExpr.withVariable(Variable.builder().setName("nextPageToken").setType(TypeNode.STRING).build());
MethodInvocationExpr getNextPageTokenMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(responseVarExpr).setMethodName("getNextPageToken").setReturnType(TypeNode.STRING).build();
AssignmentExpr nextPageTokenAssignmentExpr = AssignmentExpr.builder().setVariableExpr(nextPageTokenVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(getNextPageTokenMethodInvocationExpr).build();
whileBodyStatements.add(ExprStatement.withExpr(nextPageTokenAssignmentExpr));
// If nextPageToken variable expression is not null or empty, assign request variable with a
// value by invoking setPageToken method.
// if (!Strings.isNullOrEmpty(nextPageToken)) {
// request = request.toBuilder().setPageToken(nextPageToken).build();
// } else {
// break;
// }
Expr conditionExpr = UnaryOperationExpr.logicalNotWithExpr(MethodInvocationExpr.builder().setStaticReferenceType(TypeNode.withReference(ConcreteReference.withClazz(Strings.class))).setMethodName("isNullOrEmpty").setArguments(nextPageTokenVarExpr).setReturnType(TypeNode.BOOLEAN).build());
MethodInvocationExpr setPageTokenMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(requestVarExpr).setMethodName("toBuilder").build();
setPageTokenMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(setPageTokenMethodInvocationExpr).setMethodName("setPageToken").setArguments(nextPageTokenVarExpr).build();
setPageTokenMethodInvocationExpr = MethodInvocationExpr.builder().setExprReferenceExpr(setPageTokenMethodInvocationExpr).setMethodName("build").setReturnType(method.inputType()).build();
AssignmentExpr requestReAssignmentExpr = AssignmentExpr.builder().setVariableExpr(requestVarExpr).setValueExpr(setPageTokenMethodInvocationExpr).build();
IfStatement nextPageTokenIfStatement = IfStatement.builder().setConditionExpr(conditionExpr).setBody(Arrays.asList(ExprStatement.withExpr(requestReAssignmentExpr))).setElseBody(Arrays.asList(BreakStatement.create())).build();
whileBodyStatements.add(nextPageTokenIfStatement);
WhileStatement pagedWhileStatement = WhileStatement.builder().setConditionExpr(ValueExpr.withValue(PrimitiveValue.builder().setValue("true").setType(TypeNode.BOOLEAN).build())).setBody(whileBodyStatements).build();
RegionTag regionTag = RegionTag.builder().setServiceName(clientVarExpr.variable().identifier().name()).setRpcName(method.name()).setOverloadDisambiguation("Paged").setIsAsynchronous(true).build();
return Sample.builder().setBody(Arrays.asList(pagedWhileStatement)).setRegionTag(regionTag).build();
}
Aggregations