| /* |
| * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8038455 |
| * @summary Check that classfiles are read only once in common cases despite several rounds of |
| * annotation processing. |
| * @modules jdk.compiler |
| * @clean * |
| * @run main BaseClassesNotReRead |
| */ |
| |
| import java.io.*; |
| import java.util.*; |
| import javax.annotation.processing.*; |
| import javax.lang.model.*; |
| import javax.lang.model.element.*; |
| import javax.tools.*; |
| import javax.tools.JavaFileObject.Kind; |
| import com.sun.source.util.JavacTask; |
| |
| |
| @SupportedAnnotationTypes("*") |
| public class BaseClassesNotReRead extends AbstractProcessor { |
| public static void main(String... args) throws IOException { |
| new BaseClassesNotReRead().run(); |
| } |
| |
| void run() throws IOException { |
| File sources = new File(System.getProperty("test.src")); |
| JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); |
| try (StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null)) { |
| Iterable<? extends JavaFileObject> files = |
| fm.getJavaFileObjects(new File(sources, "BaseClassesNotReReadSource.java")); |
| DiagnosticListener<JavaFileObject> noErrors = new DiagnosticListener<JavaFileObject>() { |
| @Override |
| public void report(Diagnostic<? extends JavaFileObject> diagnostic) { |
| throw new IllegalStateException(diagnostic.toString()); |
| } |
| }; |
| JavaFileManager manager = new OnlyOneReadFileManager(fm); |
| Iterable<String> options = Arrays.asList("-processor", "BaseClassesNotReRead"); |
| JavacTask task = (JavacTask) compiler.getTask(null, manager, noErrors, options, null, files); |
| task.analyze(); |
| } |
| } |
| |
| int round = 1; |
| public boolean process(Set<? extends TypeElement> annotations, |
| RoundEnvironment roundEnv) { |
| if (round++ == 1) { |
| for (int c = 1; c <= 6; c++) { |
| generateSource("GenClass" + c, |
| "public class GenClass" + c + " { public void test() { } }"); |
| } |
| for (int c = 1; c <= 3; c++) { |
| generateSource("GenIntf" + c, |
| "public interface GenIntf" + c + " { public void test(); }"); |
| } |
| generateSource("GenAnnotation", |
| "public @interface GenAnnotation { }"); |
| generateSource("GenException", |
| "public class GenException extends Exception { }"); |
| } |
| |
| return false; |
| } |
| |
| private void generateSource(String name, String code) { |
| Filer filer = processingEnv.getFiler(); |
| try (Writer out = filer.createSourceFile(name).openWriter()) { |
| out.write(code); |
| out.close(); |
| } catch (IOException e) { |
| processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, e.toString()); |
| } |
| } |
| |
| @Override |
| public SourceVersion getSupportedSourceVersion() { |
| return SourceVersion.latest(); |
| } |
| |
| final class OnlyOneReadFileManager extends ForwardingJavaFileManager<JavaFileManager> { |
| |
| public OnlyOneReadFileManager(JavaFileManager fileManager) { |
| super(fileManager); |
| } |
| |
| @Override |
| public JavaFileObject getJavaFileForInput(Location location, String className, Kind kind) |
| throws IOException { |
| JavaFileObject fo = super.getJavaFileForInput(location, className, kind); |
| return (fo == null) ? null : new OnlyOneReadJavaFileObject(fo); |
| } |
| |
| @Override |
| public Iterable<JavaFileObject> list(Location location, String packageName, Set<Kind> kinds, |
| boolean recurse) throws IOException { |
| List<JavaFileObject> result = new ArrayList<>(); |
| for (JavaFileObject jfo : super.list(location, packageName, kinds, recurse)) { |
| result.add(new OnlyOneReadJavaFileObject(jfo)); |
| } |
| return result; |
| } |
| |
| @Override |
| public String inferBinaryName(Location location, JavaFileObject file) { |
| return super.inferBinaryName(location, |
| ((OnlyOneReadJavaFileObject) file).getFileObject()); |
| } |
| |
| } |
| |
| final class OnlyOneReadJavaFileObject extends ForwardingJavaFileObject<JavaFileObject> { |
| |
| public OnlyOneReadJavaFileObject(JavaFileObject fileObject) { |
| super(fileObject); |
| } |
| |
| boolean used; |
| |
| @Override |
| public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException { |
| if (used) throw new IllegalStateException("Already read."); |
| used = true; |
| return super.getCharContent(ignoreEncodingErrors); |
| } |
| |
| @Override |
| public InputStream openInputStream() throws IOException { |
| if (used) throw new IllegalStateException("Already read."); |
| used = true; |
| return super.openInputStream(); |
| } |
| |
| @Override |
| public Reader openReader(boolean ignoreEncodingErrors) throws IOException { |
| if (used) throw new IllegalStateException("Already read."); |
| used = true; |
| return super.openReader(ignoreEncodingErrors); |
| } |
| |
| public JavaFileObject getFileObject() { |
| return fileObject; |
| } |
| } |
| } |