Examples with KOGITO_JAVA_CLASS_OPTION org.kie.kogito.codegen.process.persistence.proto.ProtoGenerator.KOGITO_JAVA_CLASS_OPTION used on opensource projects

Example 1 with KOGITO_JAVA_CLASS_OPTION

use of org.kie.kogito.codegen.process.persistence.proto.ProtoGenerator.KOGITO_JAVA_CLASS_OPTION in project kogito-runtimes by kiegroup.

the class AbstractMarshallerGenerator method generate.

public List<CompilationUnit> generate(FileDescriptorSource proto) throws IOException {
    List<CompilationUnit> units = new ArrayList<>();
    TemplatedGenerator generator = TemplatedGenerator.builder().withFallbackContext(JavaKogitoBuildContext.CONTEXT_NAME).withTemplateBasePath(TEMPLATE_PERSISTENCE_FOLDER).build(context, "MessageMarshaller");
    Predicate<String> typeExclusions = ExclusionTypeUtils.createTypeExclusions();
    // filter types that don't require to create a marshaller
    Predicate<Descriptor> packagePredicate = (msg) -> !msg.getFileDescriptor().getPackage().equals("kogito");
    Predicate<Descriptor> jacksonPredicate = (msg) -> !typeExclusions.test(packageFromOption(msg.getFileDescriptor(), msg) + "." + msg.getName());
    Predicate<Descriptor> predicate = packagePredicate.and(jacksonPredicate);
    CompilationUnit parsedClazzFile = generator.compilationUnitOrThrow();
    SerializationContext serializationContext = new SerializationContextImpl(Configuration.builder().build());
    FileDescriptorSource kogitoTypesDescriptor = new FileDescriptorSource().addProtoFile("kogito-types.proto", context.getClassLoader().getResourceAsStream("META-INF/kogito-types.proto"));
    serializationContext.registerProtoFiles(kogitoTypesDescriptor);
    serializationContext.registerProtoFiles(proto);
    Map<String, FileDescriptor> descriptors = serializationContext.getFileDescriptors();
    for (Entry<String, FileDescriptor> entry : descriptors.entrySet()) {
        FileDescriptor d = entry.getValue();
        List<Descriptor> messages = d.getMessageTypes().stream().filter(predicate).collect(Collectors.toList());
        for (Descriptor msg : messages) {
            CompilationUnit clazzFile = parsedClazzFile.clone();
            units.add(clazzFile);
            String javaType = packageFromOption(d, msg) + "." + msg.getName();
            clazzFile.setPackageDeclaration(d.getPackage());
            ClassOrInterfaceDeclaration clazz = clazzFile.findFirst(ClassOrInterfaceDeclaration.class, sl -> true).orElseThrow(() -> new InvalidTemplateException(generator, "No class found"));
            clazz.setName(msg.getName() + "MessageMarshaller");
            clazz.getImplementedTypes(0).setTypeArguments(NodeList.nodeList(new ClassOrInterfaceType(null, javaType)));
            MethodDeclaration getJavaClassMethod = clazz.findFirst(MethodDeclaration.class, md -> md.getNameAsString().equals("getJavaClass")).orElseThrow(() -> new InvalidTemplateException(generator, "No getJavaClass method found"));
            getJavaClassMethod.setType(new ClassOrInterfaceType(null, new SimpleName(Class.class.getName()), NodeList.nodeList(new ClassOrInterfaceType(null, javaType))));
            BlockStmt getJavaClassMethodBody = new BlockStmt();
            getJavaClassMethodBody.addStatement(new ReturnStmt(new NameExpr(javaType + ".class")));
            getJavaClassMethod.setBody(getJavaClassMethodBody);
            MethodDeclaration getTypeNameMethod = clazz.findFirst(MethodDeclaration.class, md -> md.getNameAsString().equals("getTypeName")).orElseThrow(() -> new InvalidTemplateException(generator, "No getTypeName method found"));
            BlockStmt getTypeNameMethodBody = new BlockStmt();
            getTypeNameMethodBody.addStatement(new ReturnStmt(new StringLiteralExpr(msg.getFullName())));
            getTypeNameMethod.setBody(getTypeNameMethodBody);
            MethodDeclaration readFromMethod = clazz.findFirst(MethodDeclaration.class, md -> md.getNameAsString().equals("readFrom")).orElseThrow(() -> new InvalidTemplateException(generator, "No readFrom method found"));
            readFromMethod.setType(javaType);
            readFromMethod.setBody(new BlockStmt());
            MethodDeclaration writeToMethod = clazz.findFirst(MethodDeclaration.class, md -> md.getNameAsString().equals("writeTo")).orElseThrow(() -> new InvalidTemplateException(generator, "No writeTo method found"));
            writeToMethod.getParameter(1).setType(javaType);
            writeToMethod.setBody(new BlockStmt());
            ClassOrInterfaceType classType = new ClassOrInterfaceType(null, javaType);
            // read method
            VariableDeclarationExpr instance = new VariableDeclarationExpr(new VariableDeclarator(classType, "value", new ObjectCreationExpr(null, classType, NodeList.nodeList())));
            readFromMethod.getBody().ifPresent(b -> b.addStatement(instance));
            for (FieldDescriptor field : msg.getFields()) {
                String protoStreamMethodType = protoStreamMethodType(field.getTypeName());
                Expression write = null;
                Expression read = null;
                if (protoStreamMethodType != null && !field.isRepeated()) {
                    // has a mapped type
                    read = new MethodCallExpr(new NameExpr("reader"), "read" + protoStreamMethodType).addArgument(new StringLiteralExpr(field.getName()));
                    String accessor = protoStreamMethodType.equals("Boolean") ? "is" : "get";
                    write = new MethodCallExpr(new NameExpr("writer"), "write" + protoStreamMethodType).addArgument(new StringLiteralExpr(field.getName())).addArgument(new MethodCallExpr(new NameExpr("t"), accessor + StringUtils.ucFirst(field.getName())));
                } else {
                    // custom types
                    String customTypeName = javaTypeForMessage(d, field.getTypeName(), serializationContext);
                    if (field.isRepeated()) {
                        if (null == customTypeName || customTypeName.isEmpty()) {
                            customTypeName = primaryTypeClassName(field.getTypeName());
                        }
                        String writeMethod;
                        if (isArray(javaType, field)) {
                            writeMethod = "writeArray";
                            read = new MethodCallExpr(new NameExpr("reader"), "readArray").addArgument(new StringLiteralExpr(field.getName())).addArgument(new NameExpr(customTypeName + ".class"));
                        } else {
                            writeMethod = "writeCollection";
                            read = new MethodCallExpr(new NameExpr("reader"), "readCollection").addArgument(new StringLiteralExpr(field.getName())).addArgument(new ObjectCreationExpr(null, new ClassOrInterfaceType(null, ArrayList.class.getCanonicalName()), NodeList.nodeList())).addArgument(new NameExpr(customTypeName + ".class"));
                        }
                        write = new MethodCallExpr(new NameExpr("writer"), writeMethod).addArgument(new StringLiteralExpr(field.getName())).addArgument(new MethodCallExpr(new NameExpr("t"), "get" + StringUtils.ucFirst(field.getName()))).addArgument(new NameExpr(customTypeName + ".class"));
                    } else {
                        read = new MethodCallExpr(new NameExpr("reader"), "readObject").addArgument(new StringLiteralExpr(field.getName())).addArgument(new NameExpr(customTypeName + ".class"));
                        write = new MethodCallExpr(new NameExpr("writer"), "writeObject").addArgument(new StringLiteralExpr(field.getName())).addArgument(new MethodCallExpr(new NameExpr("t"), "get" + StringUtils.ucFirst(field.getName()))).addArgument(new NameExpr(customTypeName + ".class"));
                    }
                    if (customTypeName.equals(Serializable.class.getName())) {
                        String fieldClazz = (String) field.getOptionByName(KOGITO_JAVA_CLASS_OPTION);
                        if (fieldClazz == null) {
                            throw new IllegalArgumentException(format("Serializable proto field '%s' is missing value for option %s", field.getName(), KOGITO_JAVA_CLASS_OPTION));
                        } else {
                            read = new CastExpr().setExpression(new EnclosedExpr(read)).setType(fieldClazz);
                        }
                    }
                }
                MethodCallExpr setter = new MethodCallExpr(new NameExpr("value"), "set" + StringUtils.ucFirst(field.getName())).addArgument(read);
                readFromMethod.getBody().ifPresent(b -> b.addStatement(setter));
                // write method
                writeToMethod.getBody().orElseThrow(() -> new NoSuchElementException("A method declaration doesn't contain a body!")).addStatement(write);
            }
            readFromMethod.getBody().ifPresent(b -> b.addStatement(new ReturnStmt(new NameExpr("value"))));
            clazz.getMembers().sort(new BodyDeclarationComparator());
        }
        for (EnumDescriptor msg : d.getEnumTypes()) {
            CompilationUnit compilationUnit = new CompilationUnit();
            units.add(compilationUnit);
            String javaType = packageFromOption(d, msg) + "." + msg.getName();
            ClassOrInterfaceDeclaration classDeclaration = compilationUnit.setPackageDeclaration(d.getPackage()).addClass(msg.getName() + "EnumMarshaller").setPublic(true);
            classDeclaration.addImplementedType(EnumMarshaller.class).getImplementedTypes(0).setTypeArguments(NodeList.nodeList(new ClassOrInterfaceType(null, javaType)));
            classDeclaration.addMethod("getTypeName", PUBLIC).setType(String.class).setBody(new BlockStmt().addStatement(new ReturnStmt(new StringLiteralExpr(msg.getFullName()))));
            classDeclaration.addMethod("getJavaClass", PUBLIC).setType(new ClassOrInterfaceType(null, new SimpleName(Class.class.getName()), NodeList.nodeList(new ClassOrInterfaceType(null, javaType)))).setBody(new BlockStmt().addStatement(new ReturnStmt(new ClassExpr(new ClassOrInterfaceType(null, javaType)))));
            BlockStmt encodeBlock = new BlockStmt().addStatement(new IfStmt(new BinaryExpr(new NullLiteralExpr(), new NameExpr(STATE_PARAM), EQUALS), new ThrowStmt(new ObjectCreationExpr(null, new ClassOrInterfaceType(null, IllegalArgumentException.class.getName()), NodeList.nodeList(new StringLiteralExpr("Invalid value provided to enum")))), null)).addStatement(new ReturnStmt(new MethodCallExpr(new NameExpr(STATE_PARAM), "ordinal")));
            classDeclaration.addMethod("encode", PUBLIC).setType("int").addParameter(javaType, STATE_PARAM).setBody(encodeBlock);
            MethodDeclaration decode = classDeclaration.addMethod("decode", PUBLIC).setType(javaType).addParameter("int", "value");
            SwitchStmt decodeSwitch = new SwitchStmt().setSelector(new NameExpr("value"));
            msg.getValues().forEach(v -> {
                SwitchEntry dEntry = new SwitchEntry();
                dEntry.getLabels().add(new IntegerLiteralExpr(v.getNumber()));
                dEntry.addStatement(new ReturnStmt(new NameExpr(javaType + "." + v.getName())));
                decodeSwitch.getEntries().add(dEntry);
            });
            decodeSwitch.getEntries().add(new SwitchEntry().addStatement(new ThrowStmt(new ObjectCreationExpr(null, new ClassOrInterfaceType(null, IllegalArgumentException.class.getName()), NodeList.nodeList(new StringLiteralExpr("Invalid value provided to enum"))))));
            decode.setBody(new BlockStmt().addStatement(decodeSwitch));
        }
    }
    return units;
}