In -depth exploring the technical principles of the "iron can adjust behavior 'framework in the Java library
Iron Adjustable Behavior is a framework in a Java library that is designed to provide a flexible method to adjust the behavior of the object.The technical principle of this framework is based on the dynamic agency mechanism and reflection technology of Java.
In Java, the proxy object of the implementation class of an interface can be generated by using a dynamic proxy.This agent can intercept and process the call of the interface method.Iron Adjustable Behavior's framework uses this feature to realize the adjustment of the object behavior by creating the proxy object of the interface.
Below is a simple Java code example, showing how to use Iron Adjustable Behavior framework:
First of all, we need to create an interface (referred to as resizable in the example) to define the method that the target that can be adjusted:
public interface Resizable {
void resize(int width, int height);
}
Then, we create a class that implements the interface (the example is referred to as ResizableObject) as the object of the adjustment behavior:
public class ResizableObject implements Resizable {
@Override
public void resize(int width, int height) {
System.out.println("Resizing object to width: " + width + " and height: " + height);
}
}
Next, we create a processor class that adjusts the behavior (the example is called Behavioradjusthandler).This class implements the INVOCATIONHANDLER interface to intercept and process the call method:
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
public class BehaviorAdjustHandler implements InvocationHandler {
private Resizable resizable;
public BehaviorAdjustHandler(Resizable resizable) {
this.resizable = resizable;
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
System.out.println("Before method invocation");
// The method of executing the original object
Object result = method.invoke(resizable, args);
System.out.println("After method invocation");
return result;
}
}
Finally, we use Iron Adjustable Behavior framework to create a adjustable object: Monitor:
import java.lang.reflect.Proxy;
public class Main {
public static void main(String[] args) {
Resizable resizable = new ResizableObject();
// Create a processor that adjusts the behavior
BehaviorAdjustHandler handler = new BehaviorAdjustHandler(resizable);
// Create the proxy object of the interface
Resizable proxy = (Resizable) Proxy.newProxyInstance(
Resizable.class.getClassLoader(),
new Class[]{Resizable.class},
handler);
// The method of calling the proxy object
proxy.resize(100, 200);
}
}
In this example, when the adjustment of `Proxy.Resize (100, 200)`, the proxy object will intercept the call of the method and output some information before and after the actual adjustment object's `Resize` method.
In summary, the Iron Adjustable Behavior framework provides a flexible method to adjust the behavior of the object by using Java's dynamic agency mechanism and reflection technology.It can dynamically modify the behavior of the object during runtime, so that we can insert our logic by blocking the call of the interface method to achieve some additional functions.
