Sundrio :: Annotations :: Transform framework in the java class library

Sundrio :: Annotations :: Transform framework is a Java class library that provides a simple and powerful way to handle Java annotations.This article will interpret the technical principles of the framework and provide relevant Java code examples. The core principle of Sundrio :: Annotations :: Transform framework is to use Java annotations to convert and generate source code during the compilation process.This framework provides a series of annotation processors that can read and process annotations during compilation and convert it into the corresponding Java code. Below is a simple example that demonstrates how to use Sundrio :: Annotations :: Transform framework to automatically generate some commonly used code.Suppose we have a basic Java class that needs to generate Setter and Getter methods for this class. First of all, we need to add annotations to the attributes of this class to indicate that the Setter and Getter methods need to be generated: public class MyClass { @GENTESETETER // Generate the setter method @GENATEGETTER // Generate the getter method private String myProperty; } We can then read and processes these annotations with the annotations provided by Sundrio :: Annotations :: Transform.By using appropriate annotation processors, we can generate the corresponding Setter and Getter methods during the compilation period. Next, let's see how to write a simple annotation processor to achieve this function: @SupportedAnnotationTypes({"com.example.GenerateSetter", "com.example.GenerateGetter"}) @SupportedSourceVersion(SourceVersion.RELEASE_8) public class MyClassProcessor extends AbstractProcessor { @Override public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { for (Element element : roundEnv.getElementsAnnotatedWith(GenerateSetter.class)) { // The code to generate the setter method } for (Element element : roundEnv.getElementsAnnotatedWith(GenerateGetter.class)) { // The code to generate the getter method } return true; } } In this annotation processor, we specify the types of annotations that need to be processed through the annotation of `@SupportedEdanNotationTypes` and use the` `@Supportedsourceversion` annotation specifies the supported version of the compiler.Then, in the `Process` method, we can generate the corresponding code according to different types of annotations. Finally, we need to add this annotation processor to the processor list of the compiler in the construction configuration file of the project. By using Sundrio :: Annotations :: Transform framework, we can implement custom code generation and conversion during the compilation period.This method not only avoids the performance loss during runtime, but also provides better code maintenance and ease of use. Summary: Sundrio :: Annotations :: Transform framework can realize the conversion and generation of source code by reading and processing Java annotations during the compilation period.By using this framework, we can generate the required code during the compilation of the customized annotation processor.This method can improve the performance and maintenance of code generation, making development more efficient.