The technology core and application scenario of the "AutoValue Processor" framework in the Java library

AutoValue Processor is a framework in a Java class library that is used to automatically create unable variable value types.It simplifies the creation and use of the Java type by using annotations and compilation of timing code to improve the readability and performance of the code.The AutoValue Processor framework has a wide range of application scenarios and is widely used in many Java projects. The core technology of AutoValue Processor is to use the annotation processor and code to generate the Java type.When using AutoValue Processor, we only need to define an abstract class or interface with @Autovalue comments, and then AutoValue Processor will automatically generate a corresponding class according to this definition.This specific class will automatically include some common methods, such as Getters, Hashcode (), Equals (), etc., and all attributes will be declared as Final and Private, which guarantees unsophistication. The following is an example of using AutoValue Processor: import com.google.auto.value.AutoValue; @AutoValue public abstract class Person { public abstract String getName(); public abstract int getAge(); public static Person create(String name, int age) { return new AutoValue_Person(name, age); } } In this example, the @Autovalue annotation is used to mark the Person class.AutoValue Processor will automatically generate a specific class called AutoValue_person, which implements the Person interface.This specific class will automatically generate methods such as getname (), getage (), and equals (), and all attributes are immutable.We can also define a static set () method to create Person objects. The application scenarios of AutoValue Processor are very wide.It can be used to create view models, data transmission objects (DTO), unsatisfactory configuration objects, and other simple value types.AutoValue Processor can also be used with other frameworks, such as Google Guava, Dagger, and Retrofit to provide more advanced functions. To sum up, AutoValue Processor is a powerful Java -class library, which is used to automatically generate unable variable value types.By using annotations and compilation of timing code, it simplifies the creation and use of the Java class, and improves the readability and performance of the code.The application scenarios are widely used to create a variety of simple value types, and use it with other frameworks to provide more advanced functions.