Cheers :: Commons :: Annotations framework technical analysis

Che. Introduction: Che Core :: Commons :: Annotations is a Java framework that is used to add metad data information to the Java code.This framework provides a set of annotations that can be processed during compilation and runtime.This article will analyze the technical principles of cheering :: Commons :: Annotations framework. 1. Introduction to the annotation: Note is a tool for adding metadata information to the program code.In Java, the annotation starts with@symbols, which can be applied to program elements such as class, methods, fields.The annotation provides additional information as the code, which can be parsed and processed by compilers, tools and frameworks. 2. Chens :: Commons :: Annotations Framework Overview: Cheers :: Commons :: Annotations framework is developed based on the Java annotation mechanism.It provides a set of annotations to mark specific elements in the Java code for processing during or runtime. 3. Note processor: Chens :: Commons :: Annotations framework uses annotation processors to scan and process annotations in the Java code.The annotation processor is a special class that can read and process the annotation information.In the check :: Commons :: Annotations framework, the annotation processor will perform the corresponding processing logic according to the type and location of the annotation. Fourth, custom annotations: Chens :: Commons :: Annotations framework supports the creation of custom annotations.Developers can define new types of annotations according to their own needs and use these annotations in the code.Custom annotations can be used to mark specific code elements in order to identify and process in subsequent processing. The following is an example of custom annotation using Chens :: Annotations :: Annitations :: Annotations: import org.eclipse.che.core.common.annotations.Nullable; public class ExampleClass { private String name; @Nullable public String getName() { return name; } public void setName(String name) { this.name = name; } } In the above example, we use the @Nullable annotation provided by che.This annotation indicates that this method may return the NULL value, and the corresponding processing can be performed according to the annotation during the subsequent processing process. 5. Comment treatment: Chens :: Commons :: Annotations framework uses the annotation processor to process the annotations in the Java code.The annotation processor can perform the corresponding processing logic according to the type and use position of the annotation.When compiling, the annotation processor can process the annotation through the compiler plug -in.When running, the annotation processor can analyze and process the annotation information through the reflection mechanism. 6. Summary: Che Core :: Commons :: Annotations framework is a Java -based annotation framework that is used to add meta -data information to the Java code.It provides a set of annotations and corresponding annotation processors that can process the code during compilation and runtime.Developers can use this framework to define their own annotations and perform corresponding processing logic. Reference link: -CHE CORE :: Commons :: Annotations github page: [https://github.com/eclipse/che-core/master/commons-annotations se/che-Core/Tree/Master/Commons/Commons-Annotations) -JAVA Note: [https://docs.oracle.com/en/java/javase/14/docs/api/java.base/java/annotation/package-summamml] (https:// docs.Oracle.com/en/java/javase/14/docs/api/java.base/java/annotation/package-summary.html)