In -depth analysis of the "Sticky Metadata Reflective 3" framework in the Java class library
In -depth analysis of the "Sticky Metadata Reflective 3" framework in the Java class library
"Sticky Metadata Reflective 3" is a very useful framework in the Java library. It provides a simple and powerful method to process metadata.This article will explore the work principle of this framework and demonstrate how to use it.
### Framework Overview
"Sticky Metadata Reflective 3" (hereinafter referred to as SMR3) is a framework based on a reflection mechanism, which aims to make processing and operation metadata simple.Metal data is about descriptive information about program code. It can describe the characteristics and attributes of various program elements such as class, methods, fields.
SMR3 provides a simple way to obtain and use metadata using any Java or objects.It uses a reflection mechanism to detect and obtain the attributes, methods, and their annotation information.This allows us to dynamically obtain and operate metadata at runtime.
### framework function
The SMR3 framework has the following main functions:
1. All attributes of the obtaining class: SMR3 allows us to obtain all the attributes of the class, including the public, private and protected attributes declared in the class definition.It can also obtain information about attributes, annotations and other information.
2. All methods to obtain a class: SMR3 allows us to obtain all methods of the class, including public, private and protected methods.We can use these methods to check the behavior of the class, call a specific method, etc.
3. Get the annotation information: SMR3 can help us obtain annotations of class, attributes and methods.We can use annotations to mark the special attributes or methods of the class and dynamically handle them during runtime.
4. Dynamic call method: SMR3 allows us to dynamically call the class when runtime.We can use the name, parameter type, and parameter values of the method to call any method in the class.
### Frame use examples
The following is a simple example that shows how to use the SMR3 framework to obtain the attributes and methods of the class, and call the method:
import org.sticky.metadata.reflective.SMR3;
public class MyClass {
private String name;
private int age;
public void sayHello() {
System.out.println("Hello, World!");
}
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
public static void main(String[] args) {
// Get the metadata of the MyClass class
SMR3 metadata = new SMR3(MyClass.class);
// All the attributes of the class
System.out.println("Properties:");
metadata.getProperties().forEach(System.out::println);
// All methods to get a class
System.out.println("Methods:");
metadata.getMethods().forEach(System.out::println);
// Through the method name calling method
metadata.invokeMethod("sayHello");
}
}
In the above example, we first created a `MyClass` class and defined some attributes and methods.Then, we use the `SMR3` class of the SMR3 framework to obtain metadata of the` MyClass` class.By calling the method and methods of the `Getproperties () and` GetMethods () `method, we obtained all the attributes and methods of the` MyClass` class.
Finally, we used the method of `Invokementhod ()` to call the `Sayhello () method, so that the console output` Hello, World! `.
### Related configuration
In order to correctly use the SMR3 framework, we need to add corresponding library files to the project dependency configuration.The specific method can refer to the official document or related tutorial.
In addition, in order to use the SMR3 framework, we also need to be familiar with the use of Java's reflection mechanism and annotation.You can understand these concepts and technologies by consulting related documents and tutorials.
### Summarize
"Sticky Metadata Reflective 3" (SMR3) is a powerful and easy to use Java framework, which simplifies the process of processing and operation metadata.By using SMR3, we can easily obtain the attributes and methods of the class, dynamically call the method, and process the annotation information.This framework is very suitable for metadata that needs to be dynamically operated.
