Lib: Annotation processor on Intellij IDEA

Project structure

+ ---- annotation- processor
| + ---- annotation- lib
|   + ---- build.gradle
|   + ---- src
|     + ---- main
|     | + ---- java
|     |   + ---- com
|     |     + ---- prhythm
|     |       + ---- annotations
|     |         + ---- PrintUsage.java
|     |         + ---- PrintUsageProcessor.java
|     | + ---- resources
|         + ---- META-INF
|           + ---- services
|             + ---- javax.annotation.processing.Processor
| + ---- foo
|   + ---- build.gradle
|   + ---- src
|     + ---- main
|       + ---- java
|         + ---- com
|           + ---- prhythm
|             + ---- foo
|               + ---- Bar.java
| + ---- build.gradle
| + ---- settings.gradle

PrintUsage.java

package com.prhythm.annotations;

/**
 * Print usage
 * Created by nanashi07 on 15/12/2.
 */
public @interface PrintUsage {
}

PrintUsageProcessor.java

package com.prhythm.annotations;

import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.Messager;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;
import java.util.Set;

/**
 * Processor of {@link PrintUsage}
 * Created by nanashi07 on 15/12/2.
 */
@SupportedAnnotationTypes("com.prhythm.annotations.PrintUsage")
public class PrintUsageProcessor extends AbstractProcessor {
    @Override
    public boolean process(Set annotations, RoundEnvironment roundEnv) {
        Messager messager = processingEnv.getMessager();
        for (TypeElement typeElement : annotations) {
            for (Element element : roundEnv.getElementsAnnotatedWith(typeElement)) {
                String msg = String.format("Use %s on %s#%s", typeElement, element.getEnclosingElement(), element);
                messager.printMessage(Diagnostic.Kind.NOTE, msg);
            }
        }
        return true;
    }
}

javax.annotation.processing.Processor

com.prhythm.annotations.PrintUsageProcessor

Bar.java

package com.prhythm.foo;

import com.prhythm.annotations.PrintUsage;

/**
 * Test class
 * Created by nanashi07 on 15/12/2.
 */
public class Bar {

    @PrintUsage
    public void move(String name) {

    }

    @PrintUsage
    public long time() {
        return System.currentTimeMillis();
    }

}

build.gradle (foo)

group 'com.prhythm'
version '1.0-SNAPSHOT'

apply plugin: 'java'

sourceCompatibility = 1.6

repositories {
    mavenCentral()
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.11'
    compile project(':annotation-lib')
}

Enable annotation processor on preference

Build with gradle

gradle clean build

result

References:

Type Memo

Note: ==================================================
Note: TypeElement: com.prhythm.annotations.PrintUsage
Note: TypeElement.getClass(): class com.sun.tools.javac.code.Symbol$ClassSymbol
Note: TypeElement.getSimpleName(): PrintUsage
Note: TypeElement.getEnclosedElements(): 
Note: TypeElement.getEnclosingElement(): com.prhythm.annotations
Note: TypeElement.getInterfaces(): java.lang.annotation.Annotation
Note: TypeElement.getNestingKind(): TOP_LEVEL
Note: TypeElement.getQualifiedName(): com.prhythm.annotations.PrintUsage
Note: TypeElement.getSuperclass(): none
Note: TypeElement.getTypeParameters(): 
Note: TypeElement.getAnnotationMirrors(): 
Note: TypeElement.asType(): com.prhythm.annotations.PrintUsage
Note: TypeElement.getKind(): ANNOTATION_TYPE
Note: TypeElement.getModifiers(): [public, abstract]
Note: ----------------------------------------------------------
Note: Element: move(java.lang.String)
Note: Element.getModifiers(): [public]
Note: Element.getClass(): class com.sun.tools.javac.code.Symbol$MethodSymbol
Note: Element.getKind(): METHOD
Note: Element.getAnnotationMirrors(): @com.prhythm.annotations.PrintUsage
Note: Element.getSimpleName(): move
Note: Element.asType(): (java.lang.String)void
Note: Element.getEnclosedElements(): 
Note: Element.getEnclosingElement(): com.prhythm.foo.Bar
Note: ----------------------------------------------------------
Note: Element: time()
Note: Element.getModifiers(): [public]
Note: Element.getClass(): class com.sun.tools.javac.code.Symbol$MethodSymbol
Note: Element.getKind(): METHOD
Note: Element.getAnnotationMirrors(): @com.prhythm.annotations.PrintUsage
Note: Element.getSimpleName(): time
Note: Element.asType(): ()long
Note: Element.getEnclosedElements(): 
Note: Element.getEnclosingElement(): com.prhythm.foo.Bar
Note: ==================================================
Note: TypeElement: com.prhythm.annotations.Mark
Note: TypeElement.getClass(): class com.sun.tools.javac.code.Symbol$ClassSymbol
Note: TypeElement.getSimpleName(): Mark
Note: TypeElement.getEnclosedElements(): value(),names()
Note: TypeElement.getEnclosingElement(): com.prhythm.annotations
Note: TypeElement.getInterfaces(): java.lang.annotation.Annotation
Note: TypeElement.getNestingKind(): TOP_LEVEL
Note: TypeElement.getQualifiedName(): com.prhythm.annotations.Mark
Note: TypeElement.getSuperclass(): none
Note: TypeElement.getTypeParameters(): 
Note: TypeElement.getAnnotationMirrors(): 
Note: TypeElement.asType(): com.prhythm.annotations.Mark
Note: TypeElement.getKind(): ANNOTATION_TYPE
Note: TypeElement.getModifiers(): [public, abstract]
Note: ----------------------------------------------------------
Note: Element: com.prhythm.foo.Yahoo
Note: Element.getModifiers(): [public, abstract]
Note: Element.getClass(): class com.sun.tools.javac.code.Symbol$ClassSymbol
Note: Element.getKind(): INTERFACE
Note: Element.getAnnotationMirrors(): @com.prhythm.annotations.Mark("2323")
Note: Element.getSimpleName(): Yahoo
Note: Element.asType(): com.prhythm.foo.Yahoo
Note: Element.getEnclosedElements(): home(java.lang.String)
Note: Element.getEnclosingElement(): com.prhythm.foo
Note: ----------------------------------------------------------
Note: Element: home(java.lang.String)
Note: Element.getModifiers(): [public, abstract]
Note: Element.getClass(): class com.sun.tools.javac.code.Symbol$MethodSymbol
Note: Element.getKind(): METHOD
Note: Element.getAnnotationMirrors(): @com.prhythm.annotations.Mark("110"),@com.prhythm.core.generic.http.annotation.Get("https://tw.yahoo.com")
Note: Element.getSimpleName(): home
Note: Element.asType(): (java.lang.String)java.lang.String
Note: Element.getEnclosedElements(): 
Note: Element.getEnclosingElement(): com.prhythm.foo.Yahoo