| package com.mycompany.jdk16annotation; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Set; |
| import javax.annotation.processing.AbstractProcessor; |
| import javax.annotation.processing.RoundEnvironment; |
| import javax.annotation.processing.SupportedSourceVersion; |
| import javax.lang.model.SourceVersion; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.TypeElement; |
| |
| import javax.tools.Diagnostic.Kind; |
| import javax.tools.FileObject; |
| import javax.tools.StandardLocation; |
| |
| @SupportedSourceVersion(SourceVersion.RELEASE_6) |
| public class ServiceProviderProcessor extends AbstractProcessor { |
| |
| public @Override Set<String> getSupportedAnnotationTypes() { |
| return new HashSet<String>(Arrays.asList( |
| ServiceProvider.class.getCanonicalName() |
| )); |
| } |
| |
| /** public for ServiceLoader */ |
| public ServiceProviderProcessor() {} |
| |
| @Override |
| public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { |
| if (roundEnv.errorRaised()) { |
| return false; |
| } |
| if (roundEnv.processingOver()) { |
| writeServices(); |
| return true; |
| } else { |
| return true; |
| } |
| |
| } |
| |
| private void writeServices() { |
| try { |
| FileObject out = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", "META-INF/one",new Element[0]); |
| OutputStream os = out.openOutputStream(); |
| OutputStream os2 = processingEnv.getFiler().createSourceFile("org.Milos", new Element[0]).openOutputStream(); |
| OutputStreamWriter osr = new OutputStreamWriter(os2); |
| try { |
| PrintWriter w = new PrintWriter(new OutputStreamWriter(os, "UTF-8")); |
| w.write("test"); |
| w.flush(); |
| String clazz = "package org;\n class Milos {}"; |
| osr.write(clazz.toCharArray()); |
| osr.flush(); |
| } finally { |
| osr.close(); |
| os.close(); |
| } |
| |
| |
| } catch (IOException x) { |
| processingEnv.getMessager().printMessage(Kind.ERROR, "Failed to write to one: " + x.toString()); |
| } |
| } |
| |
| } |