GNTYREF framework technology based on the Java class library (in-development of the technology aspects of the Gentyref Framework Based on Java Class Libraries)
Detailed explanation of the Gentyref framework technology based on the Java class library
Overview:
Gentyref is a genetic extracting framework based on the Java class library, which is used to extract specific generic type information from the context of the attributes, methods, parameters of the Java class.This article will introduce the principles, functions, and use methods of Gentyref framework in detail, and provide some Java code examples to help readers better understand.
1. Principle and design ideas of Gentyref:
Gentyref's core principle is to extract generic type information by analyzing bytecode information in the Java class.It uses the Java reflection mechanism and bytecode analysis technology to analyze and extract metadata of the class attributes, methods, parameters, and then obtain specific examples of generic types.
The design idea of Gentyref framework includes the following key concepts:
1. Type erased: The generic types in Java will be erased when compiling, turning into the original type.Gentyref framework analysis technology is used by bytecode analysis technology to restore the specific information of generic types.
2. Metal data analysis of the class: Gentyref framework is analyzed by analyzing the bytecode information of the class, extracting metadata such as attributes, methods, parameters, and in -depth analysis.
3. Recursive analysis: Gentyref framework can analyze the attributes and methods of classics recursively, and obtain deeper generic type information.
Second, the main function of Gentyref:
1. Generation parameter acquisition: Gentyref framework can obtain specific types of generic parameters of the class, such as String type in list <string>.
2. Found parameter array Get: Gentyref framework can obtain specific types of class parameter arrays of class, such as the [String, Integer] array in Map <string, Integer>.
3. Found parameter recursive acquisition: Gentyref framework can obtain nested generic parameter types recursively.
Example of Gentyref:
Here are some examples of Java code using the Gentyref framework:
1. Get the generic parameters of the class:
import com.github.benmanes.caffeine.cache.Cache;
import com.thoughtworks.gentyref.GenericTypeReflector;
public class GenericParameterExample {
private Cache<String, Integer> cache;
public void getGenericType() {
Class<?> cacheType = GenericTypeReflector.getExactSuperType(getClass(), GenericTypeReflector.getExactType(Cache.class, GenericTypeReflector.getTypeParameter(getClass())));
System.out.println("Cache type: " + cacheType.getTypeName());
}
}
2. Getting method Return the type of generic parameters:
import com.thoughtworks.gentyref.GenericTypeReflector;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
public class GenericReturnTypeExample {
public static void main(String[] args) throws NoSuchMethodException {
Method method = GenericReturnTypeExample.class.getMethod("getStringList");
Type genericReturnType = method.getGenericReturnType();
Class<?> listType = GenericTypeReflector.getTypeParameter(genericReturnType, List.class.getTypeParameters()[0]);
System.out.println("List type: " + listType.getTypeName());
}
public List<String> getStringList() {
return null;
}
}
Fourth, summary:
Gentyref framework is a genetic extract framework based on the Java -class library, which obtains a specific instance of generic type by analyzing bytecode information of the class.It provides functions such as generating generic parameters, generic parameters array, and recursive generic parameter type types.Through the Gentyref framework, developers can easily handle logic related logic.
