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/*
* 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;
}
}
}
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