/*
* Copyright (c) 2010, 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.
*/
import com.sun.tools.javac.file.JavacFileManager;
import java.io.*;
import java.util.*;
import java.util.regex.*;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticCollector;
import javax.tools.JavaCompiler;
import javax.tools.JavaCompiler.CompilationTask;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;
// The following two classes are both used, but cannot be imported directly
// import com.sun.tools.javac.Main
// import com.sun.tools.javac.main.Main
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.JavacMessages;
import com.sun.tools.javac.util.JCDiagnostic;
import java.net.URL;
import java.net.URLClassLoader;
import javax.annotation.processing.Processor;
/**
* Class to handle example code designed to illustrate javac diagnostic messages.
*/
class Example implements Comparable<Example> {
/* Create an Example from the files found at path.
* The head of the file, up to the first Java code, is scanned
* for information about the test, such as what resource keys it
* generates when run, what options are required to run it, and so on.
*/
Example(File file) {
this.file = file;
declaredKeys = new TreeSet<String>();
srcFiles = new ArrayList<File>();
procFiles = new ArrayList<File>();
supportFiles = new ArrayList<File>();
srcPathFiles = new ArrayList<File>();
findFiles(file, srcFiles);
for (File f: srcFiles) {
parse(f);
}
if (infoFile == null)
throw new Error("Example " + file + " has no info file");
}
private void findFiles(File f, List<File> files) {
if (f.isDirectory()) {
for (File c: f.listFiles()) {
if (files == srcFiles && c.getName().equals("processors"))
findFiles(c, procFiles);
else if (files == srcFiles && c.getName().equals("sourcepath")) {
srcPathDir = c;
findFiles(c, srcPathFiles);
} else if (files == srcFiles && c.getName().equals("support"))
findFiles(c, supportFiles);
else
findFiles(c, files);
}
} else if (f.isFile() && f.getName().endsWith(".java")) {
files.add(f);
}
}
private void parse(File f) {
Pattern keyPat = Pattern.compile(" *// *key: *([^ ]+) *");
Pattern optPat = Pattern.compile(" *// *options: *(.*)");
Pattern runPat = Pattern.compile(" *// *run: *(.*)");
Pattern javaPat = Pattern.compile(" *@?[A-Za-z].*");
try {
String[] lines = read(f).split("[\r\n]+");
for (String line: lines) {
Matcher keyMatch = keyPat.matcher(line);
if (keyMatch.matches()) {
foundInfo(f);
declaredKeys.add(keyMatch.group(1));
continue;
}
Matcher optMatch = optPat.matcher(line);
if (optMatch.matches()) {
foundInfo(f);
options = Arrays.asList(optMatch.group(1).trim().split(" +"));
continue;
}
Matcher runMatch = runPat.matcher(line);
if (runMatch.matches()) {
foundInfo(f);
runOpts = Arrays.asList(runMatch.group(1).trim().split(" +"));
}
if (javaPat.matcher(line).matches())
break;
}
} catch (IOException e) {
throw new Error(e);
}
}
private void foundInfo(File file) {
if (infoFile != null && !infoFile.equals(file))
throw new Error("multiple info files found: " + infoFile + ", " + file);
infoFile = file;
}
String getName() {
return file.getName();
}
/**
* Get the set of resource keys that this test declares it will generate
* when it is run.
*/
Set<String> getDeclaredKeys() {
return declaredKeys;
}
/**
* Get the set of resource keys that this test generates when it is run.
* The test will be run if it has not already been run.
*/
Set<String> getActualKeys() {
if (actualKeys == null)
actualKeys = run(false);
return actualKeys;
}
/**
* Run the test. Information in the test header is used to determine
* how to run the test.
*/
void run(PrintWriter out, boolean raw, boolean verbose) {
if (out == null)
throw new NullPointerException();
try {
run(out, null, raw, verbose);
} catch (IOException e) {
e.printStackTrace(out);
}
}
Set<String> run(boolean verbose) {
Set<String> keys = new TreeSet<String>();
try {
run(null, keys, true, verbose);
} catch (IOException e) {
e.printStackTrace(System.err);
}
return keys;
}
/**
* Run the test. Information in the test header is used to determine
* how to run the test.
*/
private void run(PrintWriter out, Set<String> keys, boolean raw, boolean verbose)
throws IOException {
ClassLoader loader = getClass().getClassLoader();
if (supportFiles.size() > 0) {
File supportDir = new File(tempDir, "support");
supportDir.mkdirs();
clean(supportDir);
List<String> sOpts = Arrays.asList("-d", supportDir.getPath());
new Jsr199Compiler(verbose).run(null, null, false, sOpts, procFiles);
URLClassLoader ucl =
new URLClassLoader(new URL[] { supportDir.toURI().toURL() }, loader);
loader = ucl;
}
File classesDir = new File(tempDir, "classes");
classesDir.mkdirs();
clean(classesDir);
List<String> opts = new ArrayList<String>();
opts.add("-d");
opts.add(classesDir.getPath());
if (options != null)
opts.addAll(options);
if (procFiles.size() > 0) {
List<String> pOpts = Arrays.asList("-d", classesDir.getPath());
new Jsr199Compiler(verbose).run(null, null, false, pOpts, procFiles);
opts.add("-classpath"); // avoid using -processorpath for now
opts.add(classesDir.getPath());
createAnnotationServicesFile(classesDir, procFiles);
}
if (srcPathDir != null) {
opts.add("-sourcepath");
opts.add(srcPathDir.getPath());
}
try {
Compiler c = Compiler.getCompiler(runOpts, verbose);
c.run(out, keys, raw, opts, srcFiles);
} catch (IllegalArgumentException e) {
if (out != null) {
out.println("Invalid value for run tag: " + runOpts);
}
}
}
void createAnnotationServicesFile(File dir, List<File> procFiles) throws IOException {
File servicesDir = new File(new File(dir, "META-INF"), "services");
servicesDir.mkdirs();
File annoServices = new File(servicesDir, Processor.class.getName());
Writer out = new FileWriter(annoServices);
try {
for (File f: procFiles) {
out.write(f.getName().toString().replace(".java", ""));
}
} finally {
out.close();
}
}
@Override
public int compareTo(Example e) {
return file.compareTo(e.file);
}
@Override
public String toString() {
return file.getPath();
}
/**
* Read the contents of a file.
*/
private String read(File f) throws IOException {
byte[] bytes = new byte[(int) f.length()];
DataInputStream in = new DataInputStream(new FileInputStream(f));
try {
in.readFully(bytes);
} finally {
in.close();
}
return new String(bytes);
}
/**
* Clean the contents of a directory.
*/
boolean clean(File dir) {
boolean ok = true;
for (File f: dir.listFiles()) {
if (f.isDirectory())
ok &= clean(f);
ok &= f.delete();
}
return ok;
}
File file;
List<File> srcFiles;
List<File> procFiles;
File srcPathDir;
List<File> srcPathFiles;
List<File> supportFiles;
File infoFile;
private List<String> runOpts;
private List<String> options;
private Set<String> actualKeys;
private Set<String> declaredKeys;
static File tempDir = new File(System.getProperty("java.io.tmpdir"));
static void setTempDir(File tempDir) {
Example.tempDir = tempDir;
}
abstract static class Compiler {
interface Factory {
Compiler getCompiler(List<String> opts, boolean verbose);
}
static class DefaultFactory implements Factory {
public Compiler getCompiler(List<String> opts, boolean verbose) {
String first;
String[] rest;
if (opts == null || opts.isEmpty()) {
first = null;
rest = new String[0];
} else {
first = opts.get(0);
rest = opts.subList(1, opts.size()).toArray(new String[opts.size() - 1]);
}
if (first == null || first.equals("jsr199"))
return new Jsr199Compiler(verbose, rest);
else if (first.equals("simple"))
return new SimpleCompiler(verbose);
else if (first.equals("backdoor"))
return new BackdoorCompiler(verbose);
else
throw new IllegalArgumentException(first);
}
}
static Factory factory;
static Compiler getCompiler(List<String> opts, boolean verbose) {
if (factory == null)
factory = new DefaultFactory();
return factory.getCompiler(opts, verbose);
}
protected Compiler(boolean verbose) {
this.verbose = verbose;
}
abstract boolean run(PrintWriter out, Set<String> keys, boolean raw,
List<String> opts, List<File> files);
void setSupportClassLoader(ClassLoader cl) {
loader = cl;
}
protected ClassLoader loader;
protected boolean verbose;
}
/**
* Compile using the JSR 199 API. The diagnostics generated are
* scanned for resource keys. Not all diagnostic keys are generated
* via the JSR 199 API -- for example, rich diagnostics are not directly
* accessible, and some diagnostics generated by the file manager may
* not be generated (for example, the JSR 199 file manager does not see
* -Xlint:path).
*/
static class Jsr199Compiler extends Compiler {
List<String> fmOpts;
Jsr199Compiler(boolean verbose, String... args) {
super(verbose);
for (int i = 0; i < args.length; i++) {
String arg = args[i];
if (arg.equals("-filemanager") && (i + 1 < args.length)) {
fmOpts = Arrays.asList(args[++i].split(","));
} else
throw new IllegalArgumentException(arg);
}
}
@Override
boolean run(PrintWriter out, Set<String> keys, boolean raw, List<String> opts, List<File> files) {
if (out != null && keys != null)
throw new IllegalArgumentException();
if (verbose)
System.err.println("run_jsr199: " + opts + " " + files);
DiagnosticCollector<JavaFileObject> dc = null;
if (keys != null)
dc = new DiagnosticCollector<JavaFileObject>();
if (raw) {
List<String> newOpts = new ArrayList<String>();
newOpts.add("-XDrawDiagnostics");
newOpts.addAll(opts);
opts = newOpts;
}
JavaCompiler c = ToolProvider.getSystemJavaCompiler();
StandardJavaFileManager fm = c.getStandardFileManager(dc, null, null);
if (fmOpts != null)
fm = new FileManager(fm, fmOpts);
Iterable<? extends JavaFileObject> fos = fm.getJavaFileObjectsFromFiles(files);
CompilationTask t = c.getTask(out, fm, dc, opts, null, fos);
Boolean ok = t.call();
if (keys != null) {
for (Diagnostic<? extends JavaFileObject> d: dc.getDiagnostics()) {
scanForKeys((JCDiagnostic) d, keys);
}
}
return ok;
}
/**
* Scan a diagnostic for resource keys. This will not detect additional
* sub diagnostics that might be generated by a rich diagnostic formatter.
*/
private static void scanForKeys(JCDiagnostic d, Set<String> keys) {
keys.add(d.getCode());
for (Object o: d.getArgs()) {
if (o instanceof JCDiagnostic) {
scanForKeys((JCDiagnostic) o, keys);
}
}
for (JCDiagnostic sd: d.getSubdiagnostics())
scanForKeys(sd, keys);
}
}
/**
* Run the test using the standard simple entry point.
*/
static class SimpleCompiler extends Compiler {
SimpleCompiler(boolean verbose) {
super(verbose);
}
@Override
boolean run(PrintWriter out, Set<String> keys, boolean raw, List<String> opts, List<File> files) {
if (out != null && keys != null)
throw new IllegalArgumentException();
if (verbose)
System.err.println("run_simple: " + opts + " " + files);
List<String> args = new ArrayList<String>();
if (keys != null || raw)
args.add("-XDrawDiagnostics");
args.addAll(opts);
for (File f: files)
args.add(f.getPath());
StringWriter sw = null;
PrintWriter pw;
if (keys != null) {
sw = new StringWriter();
pw = new PrintWriter(sw);
} else
pw = out;
int rc = com.sun.tools.javac.Main.compile(args.toArray(new String[args.size()]), pw);
if (keys != null) {
pw.close();
scanForKeys(sw.toString(), keys);
}
return (rc == 0);
}
private static void scanForKeys(String text, Set<String> keys) {
StringTokenizer st = new StringTokenizer(text, " ,\r\n():");
while (st.hasMoreElements()) {
String t = st.nextToken();
if (t.startsWith("compiler."))
keys.add(t);
}
}
}
static class BackdoorCompiler extends Compiler {
BackdoorCompiler(boolean verbose) {
super(verbose);
}
@Override
boolean run(PrintWriter out, Set<String> keys, boolean raw, List<String> opts, List<File> files) {
if (out != null && keys != null)
throw new IllegalArgumentException();
if (verbose)
System.err.println("run_simple: " + opts + " " + files);
List<String> args = new ArrayList<String>();
if (out != null && raw)
args.add("-XDrawDiagnostics");
args.addAll(opts);
for (File f: files)
args.add(f.getPath());
StringWriter sw = null;
PrintWriter pw;
if (keys != null) {
sw = new StringWriter();
pw = new PrintWriter(sw);
} else
pw = out;
Context c = new Context();
JavacFileManager.preRegister(c); // can't create it until Log has been set up
MessageTracker.preRegister(c, keys);
com.sun.tools.javac.main.Main m = new com.sun.tools.javac.main.Main("javac", pw);
int rc = m.compile(args.toArray(new String[args.size()]), c);
if (keys != null) {
pw.close();
}
return (rc == 0);
}
static class MessageTracker extends JavacMessages {
MessageTracker(Context context) {
super(context);
}
static void preRegister(Context c, final Set<String> keys) {
if (keys != null) {
c.put(JavacMessages.messagesKey, new Context.Factory<JavacMessages>() {
public JavacMessages make(Context c) {
return new MessageTracker(c) {
@Override
public String getLocalizedString(Locale l, String key, Object... args) {
keys.add(key);
return super.getLocalizedString(l, key, args);
}
};
}
});
}
}
}
}
}