Examples with Expr com.google.api.generator.engine.ast.Expr used on opensource projects

Example 91 with Expr

use of com.google.api.generator.engine.ast.Expr in project gapic-generator-java by googleapis.

the class AbstractServiceStubSettingsClassComposer method createClassStatements.

private static List<Statement> createClassStatements(Service service, GapicServiceConfig serviceConfig, Map<String, VariableExpr> methodSettingsMemberVarExprs, Map<String, Message> messageTypes, TypeStore typeStore) {
    Function<Expr, Statement> exprToStatementFn = e -> ExprStatement.withExpr(e);
    List<Statement> statements = new ArrayList<>();
    // Assign DEFAULT_SERVICE_SCOPES.
    statements.add(SettingsCommentComposer.DEFAULT_SCOPES_COMMENT);
    VariableExpr defaultServiceScopesDeclVarExpr = DEFAULT_SERVICE_SCOPES_VAR_EXPR.toBuilder().setIsDecl(true).setScope(ScopeNode.PRIVATE).setIsStatic(true).setIsFinal(true).build();
    MethodInvocationExpr listBuilderExpr = MethodInvocationExpr.builder().setStaticReferenceType(FIXED_TYPESTORE.get("ImmutableList")).setGenerics(Arrays.asList(ConcreteReference.withClazz(String.class))).setMethodName("builder").build();
    for (String serviceScope : service.oauthScopes()) {
        listBuilderExpr = MethodInvocationExpr.builder().setExprReferenceExpr(listBuilderExpr).setMethodName("add").setArguments(ValueExpr.withValue(StringObjectValue.withValue(serviceScope))).build();
    }
    listBuilderExpr = MethodInvocationExpr.builder().setExprReferenceExpr(listBuilderExpr).setMethodName("build").setReturnType(DEFAULT_SERVICE_SCOPES_VAR_EXPR.type()).build();
    statements.add(exprToStatementFn.apply(AssignmentExpr.builder().setVariableExpr(defaultServiceScopesDeclVarExpr).setValueExpr(listBuilderExpr).build()));
    // Declare settings members.
    statements.addAll(methodSettingsMemberVarExprs.values().stream().map(v -> exprToStatementFn.apply(v.toBuilder().setIsDecl(true).setScope(ScopeNode.PRIVATE).setIsFinal(true).build())).collect(Collectors.toList()));
    statements.add(EMPTY_LINE_STATEMENT);
    for (Expr pagingAssignExpr : createPagingStaticAssignExprs(service, serviceConfig, messageTypes, typeStore)) {
        statements.add(exprToStatementFn.apply(pagingAssignExpr));
        statements.add(EMPTY_LINE_STATEMENT);
    }
    for (Method method : service.methods()) {
        Optional<GapicBatchingSettings> batchingSettingOpt = Objects.isNull(serviceConfig) ? Optional.empty() : serviceConfig.getBatchingSetting(service, method);
        if (batchingSettingOpt.isPresent()) {
            statements.add(exprToStatementFn.apply(BatchingDescriptorComposer.createBatchingDescriptorFieldDeclExpr(method, batchingSettingOpt.get(), messageTypes)));
        }
        statements.add(EMPTY_LINE_STATEMENT);
    }
    return statements;
}

Example 92 with Expr

use of com.google.api.generator.engine.ast.Expr in project gapic-generator-java by googleapis.

the class AbstractServiceStubSettingsClassComposer method createNestedClassCreateDefaultMethod.

protected MethodDefinition createNestedClassCreateDefaultMethod(TypeStore typeStore, String methodName, String defaultTransportChannelProvider, String defaultTransportChannelProviderBuilder, String defaultApiClientHeaderProviderBuilder) {
    List<Statement> bodyStatements = new ArrayList<>();
    // Initialize the builder: Builder builder = new Builder((ClientContext) null);
    TypeNode builderType = typeStore.get(NESTED_BUILDER_CLASS_NAME);
    VariableExpr builderVarExpr = VariableExpr.withVariable(Variable.builder().setType(builderType).setName("builder").build());
    bodyStatements.add(ExprStatement.withExpr(AssignmentExpr.builder().setVariableExpr(builderVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(NewObjectExpr.builder().setType(builderType).setArguments(CastExpr.builder().setType(FIXED_TYPESTORE.get("ClientContext")).setExpr(ValueExpr.createNullExpr()).build()).build()).build()));
    bodyStatements.add(EMPTY_LINE_STATEMENT);
    List<Expr> bodyExprs = new ArrayList<>();
    if (defaultTransportChannelProvider != null) {
        bodyExprs.add(MethodInvocationExpr.builder().setExprReferenceExpr(builderVarExpr).setMethodName("setTransportChannelProvider").setArguments(MethodInvocationExpr.builder().setMethodName(defaultTransportChannelProvider).build()).build());
    } else {
        bodyExprs.add(MethodInvocationExpr.builder().setExprReferenceExpr(builderVarExpr).setMethodName("setTransportChannelProvider").setArguments(MethodInvocationExpr.builder().setExprReferenceExpr(MethodInvocationExpr.builder().setMethodName(defaultTransportChannelProviderBuilder).build()).setMethodName("build").build()).build());
    }
    bodyExprs.add(MethodInvocationExpr.builder().setExprReferenceExpr(builderVarExpr).setMethodName("setCredentialsProvider").setArguments(MethodInvocationExpr.builder().setExprReferenceExpr(MethodInvocationExpr.builder().setMethodName("defaultCredentialsProviderBuilder").build()).setMethodName("build").build()).build());
    bodyExprs.add(MethodInvocationExpr.builder().setExprReferenceExpr(builderVarExpr).setMethodName("setInternalHeaderProvider").setArguments(MethodInvocationExpr.builder().setExprReferenceExpr(MethodInvocationExpr.builder().setMethodName(defaultApiClientHeaderProviderBuilder).build()).setMethodName("build").build()).build());
    bodyExprs.add(MethodInvocationExpr.builder().setExprReferenceExpr(builderVarExpr).setMethodName("setEndpoint").setArguments(MethodInvocationExpr.builder().setMethodName("getDefaultEndpoint").build()).build());
    bodyExprs.add(MethodInvocationExpr.builder().setExprReferenceExpr(builderVarExpr).setMethodName("setMtlsEndpoint").setArguments(MethodInvocationExpr.builder().setMethodName("getDefaultMtlsEndpoint").build()).build());
    bodyExprs.add(MethodInvocationExpr.builder().setExprReferenceExpr(builderVarExpr).setMethodName("setSwitchToMtlsEndpointAllowed").setArguments(ValueExpr.withValue(PrimitiveValue.builder().setType(TypeNode.BOOLEAN).setValue("true").build())).build());
    bodyStatements.addAll(bodyExprs.stream().map(e -> ExprStatement.withExpr(e)).collect(Collectors.toList()));
    bodyStatements.add(EMPTY_LINE_STATEMENT);
    Expr returnExpr = MethodInvocationExpr.builder().setMethodName("initDefaults").setArguments(builderVarExpr).setReturnType(builderType).build();
    return MethodDefinition.builder().setScope(ScopeNode.PRIVATE).setIsStatic(true).setReturnType(builderType).setName(methodName).setBody(bodyStatements).setReturnExpr(returnExpr).build();
}

Example 93 with Expr

use of com.google.api.generator.engine.ast.Expr in project gapic-generator-java by googleapis.

the class AbstractServiceClientClassComposer method createNestedRpcPagedResponseClass.

private static ClassDefinition createNestedRpcPagedResponseClass(Method method, TypeNode repeatedResponseType, Map<String, Message> messageTypes, TypeStore typeStore) {
    Preconditions.checkState(method.isPaged(), String.format("Expected method %s to be paged", method.name()));
    String className = String.format("%sPagedResponse", JavaStyle.toUpperCamelCase(method.name()));
    TypeNode thisClassType = typeStore.get(className);
    String upperJavaMethodName = JavaStyle.toUpperCamelCase(method.name());
    TypeNode methodPageType = typeStore.get(String.format("%sPage", upperJavaMethodName));
    TypeNode classExtendsType = TypeNode.withReference(ConcreteReference.builder().setClazz(AbstractPagedListResponse.class).setGenerics(Arrays.asList(method.inputType(), method.outputType(), repeatedResponseType, methodPageType, typeStore.get(String.format("%sFixedSizeCollection", upperJavaMethodName))).stream().map(t -> t.reference()).collect(Collectors.toList())).build());
    // createAsync method - variables.
    VariableExpr contextVarExpr = VariableExpr.withVariable(Variable.builder().setName("context").setType(TypeNode.withReference(ConcreteReference.builder().setClazz(PageContext.class).setGenerics(Arrays.asList(method.inputType(), method.outputType(), repeatedResponseType).stream().map(t -> t.reference()).collect(Collectors.toList())).build())).build());
    VariableExpr futureResponseVarExpr = VariableExpr.withVariable(Variable.builder().setName("futureResponse").setType(TypeNode.withReference(ConcreteReference.builder().setClazz(ApiFuture.class).setGenerics(Arrays.asList(method.outputType().reference())).build())).build());
    VariableExpr futurePageVarExpr = VariableExpr.withVariable(Variable.builder().setName("futurePage").setType(TypeNode.withReference(ConcreteReference.builder().setClazz(ApiFuture.class).setGenerics(Arrays.asList(methodPageType.reference())).build())).build());
    // createAsync method - assignment expression.
    MethodInvocationExpr createPageAsyncExpr = MethodInvocationExpr.builder().setStaticReferenceType(methodPageType).setMethodName("createEmptyPage").build();
    createPageAsyncExpr = MethodInvocationExpr.builder().setExprReferenceExpr(createPageAsyncExpr).setMethodName("createPageAsync").setArguments(contextVarExpr, futureResponseVarExpr).setReturnType(futurePageVarExpr.type()).build();
    AssignmentExpr futurePageAssignExpr = AssignmentExpr.builder().setVariableExpr(futurePageVarExpr.toBuilder().setIsDecl(true).build()).setValueExpr(createPageAsyncExpr).build();
    // createAsync method - anonymous class expression.
    VariableExpr inputVarExpr = VariableExpr.withVariable(Variable.builder().setName("input").setType(methodPageType).build());
    // Overrides ApiFunction.apply.
    // (https://github.com/googleapis/api-common-java/blob/debf25960dea0367b0d3b5e16d57d76c1d01947e/src/main/java/com/google/api/core/ApiFunction.java).
    Expr pageToTransformExpr = LambdaExpr.builder().setArguments(inputVarExpr.toBuilder().setIsDecl(true).build()).setReturnExpr(NewObjectExpr.builder().setType(thisClassType).setArguments(inputVarExpr).build()).build();
    // createAsync method - return expression.
    TypeNode returnType = TypeNode.withReference(ConcreteReference.builder().setClazz(ApiFuture.class).setGenerics(Arrays.asList(typeStore.get(className).reference())).build());
    Expr returnExpr = MethodInvocationExpr.builder().setStaticReferenceType(typeStore.get("ApiFutures")).setMethodName("transform").setArguments(futurePageVarExpr, pageToTransformExpr, MethodInvocationExpr.builder().setStaticReferenceType(typeStore.get("MoreExecutors")).setMethodName("directExecutor").build()).setReturnType(returnType).build();
    MethodDefinition createAsyncMethod = MethodDefinition.builder().setScope(ScopeNode.PUBLIC).setIsStatic(true).setReturnType(returnType).setName("createAsync").setArguments(Arrays.asList(contextVarExpr, futureResponseVarExpr).stream().map(e -> e.toBuilder().setIsDecl(true).build()).collect(Collectors.toList())).setBody(Arrays.asList(ExprStatement.withExpr(futurePageAssignExpr))).setReturnExpr(returnExpr).build();
    // Private constructor.
    VariableExpr pageVarExpr = VariableExpr.withVariable(Variable.builder().setName("page").setType(methodPageType).build());
    MethodDefinition privateCtor = MethodDefinition.constructorBuilder().setScope(ScopeNode.PRIVATE).setReturnType(thisClassType).setArguments(pageVarExpr.toBuilder().setIsDecl(true).build()).setBody(Arrays.asList(ExprStatement.withExpr(// Shortcut.
    ReferenceConstructorExpr.superBuilder().setType(methodPageType).setArguments(pageVarExpr, MethodInvocationExpr.builder().setStaticReferenceType(typeStore.get(String.format("%sFixedSizeCollection", upperJavaMethodName))).setMethodName("createEmptyCollection").build()).build()))).build();
    List<MethodDefinition> javaMethods = new ArrayList<>();
    javaMethods.add(createAsyncMethod);
    javaMethods.add(privateCtor);
    return ClassDefinition.builder().setIsNested(true).setScope(ScopeNode.PUBLIC).setIsStatic(true).setExtendsType(classExtendsType).setName(className).setMethods(javaMethods).build();
}

Example 94 with Expr

use of com.google.api.generator.engine.ast.Expr in project gapic-generator-java by googleapis.

the class AbstractServiceClientClassComposer method createRequestBuilderExpr.

@VisibleForTesting
static Expr createRequestBuilderExpr(Method method, List<MethodArgument> signature, TypeStore typeStore) {
    TypeNode methodInputType = method.inputType();
    Expr newBuilderExpr = MethodInvocationExpr.builder().setMethodName("newBuilder").setStaticReferenceType(methodInputType).build();
    // Maintain the args' order of appearance for better determinism.
    List<Field> rootFields = new ArrayList<>();
    Map<Field, Trie<Field>> rootFieldToTrie = new HashMap<>();
    for (MethodArgument arg : signature) {
        Field rootField = arg.nestedFields().isEmpty() ? arg.field() : arg.nestedFields().get(0);
        if (!rootFields.contains(rootField)) {
            rootFields.add(rootField);
        }
        Trie<Field> updatedTrie = rootFieldToTrie.containsKey(rootField) ? rootFieldToTrie.get(rootField) : new Trie<>();
        List<Field> nestedFieldsWithChild = new ArrayList<>(arg.nestedFields());
        nestedFieldsWithChild.add(arg.field());
        updatedTrie.insert(nestedFieldsWithChild);
        rootFieldToTrie.put(rootField, updatedTrie);
    }
    Function<Field, Expr> parentPreprocFn = field -> (Expr) MethodInvocationExpr.builder().setStaticReferenceType(field.type()).setMethodName("newBuilder").build();
    TriFunction<Field, Expr, Expr, Expr> parentPostprocFn = (field, baseRefExpr, leafProcessedExpr) -> {
        boolean isRootNode = field == null;
        return isRootNode ? leafProcessedExpr : MethodInvocationExpr.builder().setExprReferenceExpr(baseRefExpr).setMethodName(String.format("set%s", JavaStyle.toUpperCamelCase(field.name()))).setArguments(MethodInvocationExpr.builder().setExprReferenceExpr(leafProcessedExpr).setMethodName("build").build()).build();
    };
    final Map<Field, MethodArgument> fieldToMethodArg = signature.stream().collect(Collectors.toMap(a -> a.field(), a -> a));
    BiFunction<Field, Expr, Expr> leafProcFn = (field, parentBaseRefExpr) -> (Expr) buildNestedSetterInvocationExpr(fieldToMethodArg.get(field), parentBaseRefExpr);
    for (Field rootField : rootFields) {
        newBuilderExpr = rootFieldToTrie.get(rootField).dfsTraverseAndReduce(parentPreprocFn, parentPostprocFn, leafProcFn, newBuilderExpr);
    }
    return MethodInvocationExpr.builder().setExprReferenceExpr(newBuilderExpr).setMethodName("build").setReturnType(methodInputType).build();
}

Example 95 with Expr

use of com.google.api.generator.engine.ast.Expr in project gapic-generator-java by googleapis.

the class JavaWriterVisitor method visit.

@Override
public void visit(IfStatement ifStatement) {
    buffer.append(IF);
    space();
    leftParen();
    ifStatement.conditionExpr().accept(this);
    rightParen();
    space();
    leftBrace();
    newline();
    statements(ifStatement.body());
    buffer.append(RIGHT_BRACE);
    if (!ifStatement.elseIfs().isEmpty()) {
        for (Map.Entry<Expr, List<Statement>> elseIfEntry : ifStatement.elseIfs().entrySet()) {
            Expr elseIfConditionExpr = elseIfEntry.getKey();
            List<Statement> elseIfBody = elseIfEntry.getValue();
            space();
            buffer.append(ELSE);
            space();
            buffer.append(IF);
            space();
            leftParen();
            elseIfConditionExpr.accept(this);
            rightParen();
            space();
            leftBrace();
            newline();
            statements(elseIfBody);
            rightBrace();
        }
    }
    if (!ifStatement.elseBody().isEmpty()) {
        space();
        buffer.append(ELSE);
        space();
        leftBrace();
        newline();
        statements(ifStatement.elseBody());
        rightBrace();
    }
    newline();
}