In -depth analysis of the SUNDRIO :: Annotations :: Transform framework
In the Java class library, the Sundrio :: Annotations :: Transform framework is a very useful tool that can help developers use annotations to convert when writing the Java code.This article will analyze this framework in depth and provide some Java code examples to illustrate its usage methods and functions.
Sundrio :: Annotations :: Transform framework allows developers to use annotations to achieve code conversion and generating.It provides a set of annotations that convert the code into another form during compilation or runtime.This is very useful for writing tools or frameworks, and can be modified and converted to the code according to the annotation.
The following is an example that shows how to use the Sundrio :: Annotations :: Transform framework to implement code conversion.Consider a simple Java class, which contains a member variable and a method:
import io.sundr.transform.annotations.Transformation;
public class MyClass {
@Transformation(target = String.class, property = "toUpperCase")
private String name;
public void sayHello() {
System.out.println("Hello " + name);
}
}
In this example, we used the `@transformation` annotation to convert the` name` variable.`@Transformation` Note: There are two attributes:` target` and `propely.The `target` attribute specifies the target type of conversion, and the` property` attribute specifies the specific operation of the conversion.
Now, we can use the function of Sundrio :: Annotations :: Transform framework to convert this class.The following is a sample code that shows how to use this framework to execute the conversion:
import io.sundr.transform.annotations.AnnotationsTransformer;
import io.sundr.transform.annotations.AnnotationProcessor;
public class TransformationExample {
public static void main(String[] args) {
AnnotationsTransformer transformer = AnnotationsTransformer.transform(MyClass.class);
AnnotationProcessor<MyClass> processor = AnnotationProcessor.create(MyClass.class);
MyClass transformedClass = processor.process(transformer);
TransformedClass.sayhello (); // Output: Hello World
}
}
In the above example, we first create a `AnnotationStransFormer` object through the method of` AnnotationStransFormer.transform () `and specify a class to be converted.Then, we create a `AnnotationProcessor` object through the method of` AnnotationProcessor.Create () ``) and specify the class to be processed.
Finally, we use the `Process ()" method of the `AnnotationProcessor` object to pass it to the transformation of the` AnnotationStransformer` object.This will return an object that has been converted.
In the above example, the conversion attribute of the `Name` variable is set to` Touppercase`, which will convert the string to a capital letter.Therefore, when we call the `TransformedClass.sayhello () method, it will output" Hello World ", where" world "is the result of the conversion.
Sundrio :: Annotations :: Transform framework is a powerful and easy -to -use tool that can help developers use annotations to convert when writing Java code.By using this framework, developers can more conveniently write code generating tools or frameworks, and modify and convey the code as needed.
