import java.io.*;

import java.util.*;

import java.util.jar.*;

import java.util.zip.*;

import javax.tools.*;

import com.sun.tools.javac.file.JavacFileManager;

import com.sun.tools.javac.util.Context;

import com.sun.tools.javac.util.Options;

public class Test {

public static void main(String... args) throws Exception {

new Test().run();

}

Set<String> foundClasses = new TreeSet<String>();

Set<String> foundJars = new TreeSet<String>();

void run() throws Exception {

File rt_jar = findRtJar();

// names for entries to be created in directories and jar files

String[] entries = { "p/A.java", "p/A.class", "p/resources/A-1.html" };

// test various combinations of directories and jar files, intended to

// cover all sources of file objects within JavacFileManager's support classes

test(createFileManager(), createDir("dir", entries), "p", entries);

test(createFileManager(), createDir("a b/dir", entries), "p", entries);

for (boolean useOptimizedZip: new boolean[] { false, true }) {

test(createFileManager(useOptimizedZip), createJar("jar", entries), "p", entries);

test(createFileManager(useOptimizedZip), createJar("jar jar", entries), "p", entries);

for (boolean useSymbolFile: new boolean[] { false, true }) {

test(createFileManager(useOptimizedZip, useSymbolFile), rt_jar, "java.lang.ref", null);

}

}

if (errors > 0)

throw new Exception(errors + " errors found");

// Verify that we hit all the impl classes we intended

checkCoverage("classes", foundClasses,

"RegularFileObject", "SymbolFileObject", "ZipFileIndexFileObject", "ZipFileObject");

// Verify that we hit the jar files we intended, specifically ct.sym as well as rt.jar

checkCoverage("jar files", foundJars,

"ct.sym", "jar", "jar jar", "rt.jar");

}

// use a new file manager for each test

void test(StandardJavaFileManager fm, File f, String pkg, String[] entries) throws Exception {

System.err.println("Test " + f);

try {

if (f.isDirectory()) {

for (File dir: new File[] { f, f.getAbsoluteFile() }) {

for (String e: entries) {

JavaFileObject fo = fm.getJavaFileObjects(new File(dir, e)).iterator().next();

test(fo, dir, e);

}

}

}

fm.setLocation(StandardLocation.CLASS_PATH, Collections.singleton(f));

fm.setLocation(StandardLocation.SOURCE_PATH, Collections.singleton(f.getAbsoluteFile()));

for (StandardLocation l: EnumSet.of(StandardLocation.CLASS_PATH, StandardLocation.SOURCE_PATH)) {

for (JavaFileObject fo: fm.list(l, pkg, EnumSet.allOf(JavaFileObject.Kind.class), true)) {

// we could use fm.getLocation but the following guarantees we preserve the original filename

File dir = (l == StandardLocation.CLASS_PATH ? f : f.getAbsoluteFile());

char sep = (dir.isDirectory() ? File.separatorChar : '/');

String b = fm.inferBinaryName(l, fo);

String e = fo.getKind().extension;

test(fo, dir, b.replace('.', sep) + e);

}

}

} finally {

fm.close();

}

}

void test(JavaFileObject fo, File dir, String p) {

System.err.println("Test: " + fo);

String expect = dir.isDirectory() ? new File(dir, p).getPath() : (dir.getPath() + "(" + p + ")");

String found = fo.getName();

// if ct.sym is found, replace it with the equivalent rt.jar

String found2 = found.replaceAll("lib([\\\\/])ct.sym\\(META-INF/sym/rt.jar/", "jre$1lib$1rt.jar(");

if (!expect.equals(found2)) {

System.err.println("expected: " + expect);

System.err.println(" found: " + found);

if (!found.equals(found2))

System.err.println(" found2: " + found2);

error("Failed: " + fo);

}

// record the file object class name for coverage checks later

foundClasses.add(fo.getClass().getSimpleName());

if (found.contains("(")) {

// record access to the jar file for coverage checks later

foundJars.add(new File(found.substring(0, found.indexOf("("))).getName());

}

}

void checkCoverage(String label, Set<String> found, String... expect) throws Exception {

Set<String> e = new TreeSet<String>(Arrays.asList(expect));

if (!found.equals(e)) {

e.removeAll(found);

throw new Exception("expected " + label + " not used: " + e);

}

}

JavacFileManager createFileManager() {

return createFileManager(false, false);

}

JavacFileManager createFileManager(boolean useOptimizedZip) {

return createFileManager(useOptimizedZip, false);

}

JavacFileManager createFileManager(boolean useOptimizedZip, boolean useSymbolFile) {

Context c = new Context();

Options options = Options.instance(c);

options.put("useOptimizedZip", Boolean.toString(useOptimizedZip));

if (!useSymbolFile) {

options.put("ignore.symbol.file", "true");

}

return new JavacFileManager(c, false, null);

}

File createDir(String name, String... entries) throws Exception {

File dir = new File(name);

if (!dir.mkdirs())

throw new Exception("cannot create directories " + dir);

for (String e: entries) {

writeFile(new File(dir, e), e);

}

return dir;

}

File createJar(String name, String... entries) throws IOException {

File jar = new File(name);

OutputStream out = new FileOutputStream(jar);

try {

JarOutputStream jos = new JarOutputStream(out);

for (String e: entries) {

jos.putNextEntry(new ZipEntry(e));

jos.write(e.getBytes());

}

jos.close();

} finally {

out.close();

}

return jar;

}

File findRtJar() throws Exception {

File java_home = new File(System.getProperty("java.home"));

if (java_home.getName().equals("jre"))

java_home = java_home.getParentFile();

File rt_jar = new File(new File(new File(java_home, "jre"), "lib"), "rt.jar");

if (!rt_jar.exists())

throw new Exception("can't find rt.jar");

return rt_jar;

}

byte[] read(InputStream in) throws IOException {

byte[] data = new byte[1024];

int offset = 0;

try {

int n;

while ((n = in.read(data, offset, data.length - offset)) != -1) {

offset += n;

if (offset == data.length)

data = Arrays.copyOf(data, 2 * data.length);

}

} finally {

in.close();

}

return Arrays.copyOf(data, offset);

}

void writeFile(File f, String s) throws IOException {

f.getParentFile().mkdirs();

FileWriter out = new FileWriter(f);

try {

out.write(s);

} finally {

out.close();

}

}

void error(String msg) {

System.err.println(msg);

errors++;

}

int errors;

}