/*
* Copyright (c) 2011, 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 7021650
* @summary Fix Context issues
* @library /tools/javac/lib
* @build JavacTestingAbstractProcessor T7021650
* @run main T7021650
*/
import java.io.*;
import java.net.*;
import java.util.*;
import javax.annotation.processing.*;
import javax.lang.model.element.*;
import javax.tools.*;
import com.sun.tools.javac.comp.Attr;
import com.sun.tools.javac.file.JavacFileManager;
import com.sun.tools.javac.main.Main;
import com.sun.tools.javac.processing.JavacProcessingEnvironment;
import com.sun.tools.javac.util.Context;
public class T7021650 extends JavacTestingAbstractProcessor {
public static void main(String... args) throws Exception {
new T7021650().run();
}
static File testSrc = new File(System.getProperty("test.src"));
static final int MAX_ROUNDS = 3;
/**
* Perform a compilation with custom factories registered in the context,
* and verify that corresponding objects are created in each round.
*/
void run() throws Exception {
Counter demoCounter = new Counter();
Counter myAttrCounter = new Counter();
Context context = new Context();
// Use a custom file manager which creates classloaders for annotation
// processors with a sensible delegation parent, so that all instances
// of test classes come from the same class loader. This is important
// because the test performs class checks on the instances of classes
// found in the context for each round or processing.
context.put(JavaFileManager.class, new Context.Factory<JavaFileManager>() {
public JavaFileManager make(Context c) {
return new JavacFileManager(c, true, null) {
@Override
protected ClassLoader getClassLoader(URL[] urls) {
return new URLClassLoader(urls, T7021650.class.getClassLoader());
}
};
}
});
Demo.preRegister(context, demoCounter);
MyAttr.preRegister(context, myAttrCounter);
String[] args = {
"-d", ".",
"-processor", T7021650.class.getName(),
"-XprintRounds",
new File(testSrc, T7021650.class.getName() + ".java").getPath()
};
compile(context, args);
// Expect to create Demo for initial round, then MAX_ROUNDS in which
// GenX files are generated, then standard final round of processing.
checkEqual("demoCounter", demoCounter.count, MAX_ROUNDS + 2);
// Expect to create MyAttr for same processing rounds as for Demo,
// plus additional context for final compilation.
checkEqual("myAttrCounter", myAttrCounter.count, MAX_ROUNDS + 3);
}
void compile(Context context, String... args) throws Exception {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
Main m = new Main("javac", pw);
Main.Result res = m.compile(args, context);
pw.close();
String out = sw.toString();
if (!out.isEmpty())
System.err.println(out);
if (!res.isOK())
throw new Exception("compilation failed unexpectedly: result=" + res);
}
void checkEqual(String label, int found, int expect) throws Exception {
if (found != expect)
throw new Exception("unexpected value for " + label
+ ": expected " + expect
+ ": found " + found);
}
//---------------
/*
* A custom class unknown to javac but nonetheless registered in the context.
*/
static class Demo {
static void preRegister(Context context, final Counter counter) {
context.put(Demo.class, new Context.Factory<Demo>() {
public Demo make(Context c) {
counter.count++;
return new Demo(c);
}
});
}
Demo(Context c) {
c.put(Demo.class, this);
}
static Demo instance(Context context) {
return context.get(Demo.class);
}
}
/**
* A custom version of a standard javac component.
*/
static class MyAttr extends Attr {
static void preRegister(Context context, final Counter counter) {
context.put(attrKey, new Context.Factory<Attr>() {
public Attr make(Context c) {
counter.count++;
return new MyAttr(c);
}
});
}
MyAttr(Context c) {
super(c);
}
}
static class Counter {
int count;
}
//---------------
int round = 0;
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
round++;
Context context = ((JavacProcessingEnvironment) processingEnv).getContext();
// verify items in context as expected
check("Demo", Demo.instance(context), Demo.class);
check("Attr", Attr.instance(context), MyAttr.class);
// For a few rounds, generate new source files, so that we can check whether
// values in the context are correctly handled in subsequent processing rounds
if (round <= MAX_ROUNDS) {
String pkg = "p";
String currClass = "Gen" + round;
String curr = pkg + "." + currClass;
String next = (pkg + ".Gen" + (round + 1));
StringBuilder text = new StringBuilder();
text.append("package ").append(pkg).append(";\n");
text.append("public class ").append(currClass).append(" {\n");
if (round < MAX_ROUNDS)
text.append(" ").append(next).append(" x;\n");
text.append("}\n");
try {
JavaFileObject fo = filer.createSourceFile(curr);
Writer out = fo.openWriter();
try {
out.write(text.toString());
} finally {
out.close();
}
} catch (IOException e) {
throw new Error(e);
}
}
return true;
}
void check(String label, Object o, Class<?> clazz) {
if (o == null)
throw new IllegalStateException(label + ": no item found");
if (!clazz.isAssignableFrom(o.getClass()))
throw new IllegalStateException(label + ": unexpected class: " + o.getClass());
}
}