The principles and usage methods of the FLUENT Reflection framework in the Java library
FLUENT Reflection is a framework for realizing reflection operations in the Java class library.It provides a more concise and easy -to -read way to use reflection.This article will introduce the principles and usage methods of Fluent Reflection, and provide some Java code examples.
## 1. The principle of Fluent Reflection
FLUENT Reflection is based on the Java reflection mechanism. By encapsulation and simplifying reflection operations, the code is more concise and easy to read.It is mainly based on the following two principles:
1. Chain calls: Fluent Reflection uses chain calls to achieve reflection operations.Through the method chain, we can operate the target object step by step to avoid tedious intermediate steps.
2. Functional programming style: FLUENT Reflection makes full use of the functional interface and Lambda expression feature introduced by Java 8.It encapsulates the reflection operation as a functional interface and combines the simple writing of LAMBDA expressions to make the code more concise and easy to read.
###, how to use FLUENT Reflection
Below we will demonstrate the use of FLUENT Reflection through some example code.
#### 1. All methods to get the class
import org.fluent.reflection.FluentReflection;
public class Main {
public static void main(String[] args) {
FluentReflection reflector = new FluentReflection(MyClass.class);
reflector.getMethods().forEach(System.out::println);
}
}
class MyClass {
public void method1() {}
public void method2() {}
}
In the above code, we used FluentReflection to obtain all the methods of the MyClass class and printed them.
#### 2. Calling method
import org.fluent.reflection.FluentReflection;
import java.lang.reflect.Method;
public class Main {
public static void main(String[] args) {
FluentReflection reflector = new FluentReflection(MyClass.class);
Method method = reflector.getMethod("myMethod").orElseThrow(RuntimeException::new);
MyClass obj = new MyClass();
reflector.invokeMethod(obj, method);
}
}
class MyClass {
public void myMethod() {
System.out.println("Hello, Fluent Reflection!");
}
}
In the above code, we used FluentReflection to obtain the MyMethod method of the MyClass class and call this method through reflex.
#### 3. Set the value of the field
import org.fluent.reflection.FluentReflection;
import java.lang.reflect.Field;
public class Main {
public static void main(String[] args) {
FluentReflection reflector = new FluentReflection(MyClass.class);
Field field = reflector.getField("myField").orElseThrow(RuntimeException::new);
MyClass obj = new MyClass();
reflector.setFieldValue(obj, field, "new value");
}
}
class MyClass {
public String myField;
}
In the above code, we used FluentReflection to obtain the MyClass class MyField field and set the value of the field through reflection.
## in conclusion
FLUENT Reflection is a framework for simplifying reflective operations. Through chain calls and functional programming styles, the code is more concise and easy to read.Through the introduction of this article, it is hoped that readers can understand the principles and usage methods of the Flut Reflection and use it flexibly in actual development.
