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The Utils.java Java example source code
/*
* Copyright (c) 2007, 2013, 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 java.nio.file.Path;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileFilter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.jar.JarFile;
import java.util.jar.JarOutputStream;
import java.util.jar.Pack200;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import static java.nio.file.StandardCopyOption.*;
import static java.nio.file.StandardOpenOption.*;
/**
*
* @author ksrini
*/
/*
* This class contains all the commonly used utilities used by various tests
* in this directory.
*/
class Utils {
static final String JavaHome = System.getProperty("test.java",
System.getProperty("java.home"));
static final boolean IsWindows =
System.getProperty("os.name").startsWith("Windows");
static final boolean Is64Bit =
System.getProperty("sun.arch.data.model", "32").equals("64");
static final File JavaSDK = new File(JavaHome).getParentFile();
static final String PACK_FILE_EXT = ".pack";
static final String JAVA_FILE_EXT = ".java";
static final String CLASS_FILE_EXT = ".class";
static final String JAR_FILE_EXT = ".jar";
static final File TEST_SRC_DIR = new File(System.getProperty("test.src"));
static final File TEST_CLS_DIR = new File(System.getProperty("test.classes"));
static final String VERIFIER_DIR_NAME = "pack200-verifier";
static final File VerifierJar = new File(VERIFIER_DIR_NAME + JAR_FILE_EXT);
static final File XCLASSES = new File("xclasses");
private Utils() {} // all static
static {
if (!JavaHome.endsWith("jre")) {
throw new RuntimeException("Error: requires an SDK to run");
}
}
private static void init() throws IOException {
if (VerifierJar.exists()) {
return;
}
File srcDir = new File(TEST_SRC_DIR, VERIFIER_DIR_NAME);
if (!srcDir.exists()) {
// if not available try one level above
srcDir = new File(TEST_SRC_DIR.getParentFile(), VERIFIER_DIR_NAME);
}
List<File> javaFileList = findFiles(srcDir, createFilter(JAVA_FILE_EXT));
File tmpFile = File.createTempFile("javac", ".tmp");
XCLASSES.mkdirs();
FileOutputStream fos = null;
PrintStream ps = null;
try {
fos = new FileOutputStream(tmpFile);
ps = new PrintStream(fos);
for (File f : javaFileList) {
ps.println(f.getAbsolutePath());
}
} finally {
close(ps);
close(fos);
}
compiler("-d",
XCLASSES.getName(),
"@" + tmpFile.getAbsolutePath());
jar("cvfe",
VerifierJar.getName(),
"sun.tools.pack.verify.Main",
"-C",
XCLASSES.getName(),
".");
}
static void dirlist(File dir) {
File[] files = dir.listFiles();
System.out.println("--listing " + dir.getAbsolutePath() + "---");
for (File f : files) {
StringBuffer sb = new StringBuffer();
sb.append(f.isDirectory() ? "d " : "- ");
sb.append(f.getName());
System.out.println(sb);
}
}
static void doCompareVerify(File reference, File specimen) throws IOException {
init();
List<String> cmds = new ArrayList();
cmds.add(getJavaCmd());
cmds.add("-cp");
cmds.add(Utils.locateJar("tools.jar") +
System.getProperty("path.separator") + VerifierJar.getName());
cmds.add("sun.tools.pack.verify.Main");
cmds.add(reference.getAbsolutePath());
cmds.add(specimen.getAbsolutePath());
cmds.add("-O");
runExec(cmds);
}
static void doCompareBitWise(File reference, File specimen)
throws IOException {
init();
List<String> cmds = new ArrayList();
cmds.add(getJavaCmd());
cmds.add("-cp");
cmds.add(Utils.locateJar("tools.jar")
+ System.getProperty("path.separator") + VerifierJar.getName());
cmds.add("sun.tools.pack.verify.Main");
cmds.add(reference.getName());
cmds.add(specimen.getName());
cmds.add("-O");
cmds.add("-b");
runExec(cmds);
}
static FileFilter createFilter(final String extension) {
return new FileFilter() {
@Override
public boolean accept(File pathname) {
String name = pathname.getName();
if (name.endsWith(extension)) {
return true;
}
return false;
}
};
}
/*
* clean up all the usual suspects
*/
static void cleanup() throws IOException {
recursiveDelete(XCLASSES);
List<File> toDelete = new ArrayList<>();
toDelete.addAll(Utils.findFiles(new File("."),
Utils.createFilter(".out")));
toDelete.addAll(Utils.findFiles(new File("."),
Utils.createFilter(".bak")));
toDelete.addAll(Utils.findFiles(new File("."),
Utils.createFilter(".jar")));
toDelete.addAll(Utils.findFiles(new File("."),
Utils.createFilter(".pack")));
toDelete.addAll(Utils.findFiles(new File("."),
Utils.createFilter(".bnd")));
toDelete.addAll(Utils.findFiles(new File("."),
Utils.createFilter(".txt")));
toDelete.addAll(Utils.findFiles(new File("."),
Utils.createFilter(".idx")));
toDelete.addAll(Utils.findFiles(new File("."),
Utils.createFilter(".gidx")));
for (File f : toDelete) {
f.delete();
}
}
static final FileFilter DIR_FILTER = new FileFilter() {
public boolean accept(File pathname) {
if (pathname.isDirectory()) {
return true;
}
return false;
}
};
static final FileFilter FILE_FILTER = new FileFilter() {
public boolean accept(File pathname) {
if (pathname.isFile()) {
return true;
}
return false;
}
};
static void copyFile(File src, File dst) throws IOException {
Path parent = dst.toPath().getParent();
if (parent != null) {
Files.createDirectories(parent);
}
Files.copy(src.toPath(), dst.toPath(), COPY_ATTRIBUTES, REPLACE_EXISTING);
if (dst.isDirectory() && !dst.canWrite()) {
dst.setWritable(true);
}
}
static String baseName(File file, String extension) {
return baseName(file.getAbsolutePath(), extension);
}
static String baseName(String name, String extension) {
int cut = name.length() - extension.length();
return name.lastIndexOf(extension) == cut
? name.substring(0, cut)
: name;
}
static void createFile(File outFile, List<String> content) throws IOException {
Files.write(outFile.getAbsoluteFile().toPath(), content,
Charset.defaultCharset(), CREATE_NEW, TRUNCATE_EXISTING);
}
/*
* Suppose a path is provided which consists of a full path
* this method returns the sub path for a full path ex: /foo/bar/baz/foobar.z
* and the base path is /foo/bar it will will return baz/foobar.z.
*/
private static String getEntryPath(String basePath, String fullPath) {
if (!fullPath.startsWith(basePath)) {
return null;
}
return fullPath.substring(basePath.length());
}
static String getEntryPath(File basePathFile, File fullPathFile) {
return getEntryPath(basePathFile.toString(), fullPathFile.toString());
}
public static void recursiveCopy(File src, File dest) throws IOException {
if (!src.exists() || !src.canRead()) {
throw new IOException("file not found or readable: " + src);
}
if (dest.exists() && !dest.isDirectory() && !dest.canWrite()) {
throw new IOException("file not found or writeable: " + dest);
}
if (!dest.exists()) {
dest.mkdirs();
}
List<File> a = directoryList(src);
for (File f : a) {
copyFile(f, new File(dest, getEntryPath(src, f)));
}
}
static List<File> directoryList(File dirname) {
List<File> dirList = new ArrayList();
return directoryList(dirname, dirList, null);
}
private static List<File> directoryList(File dirname, List dirList,
File[] dirs) {
dirList.addAll(Arrays.asList(dirname.listFiles(FILE_FILTER)));
dirs = dirname.listFiles(DIR_FILTER);
for (File f : dirs) {
if (f.isDirectory() && !f.equals(dirname)) {
dirList.add(f);
directoryList(f, dirList, dirs);
}
}
return dirList;
}
static void recursiveDelete(File dir) throws IOException {
if (dir.isFile()) {
dir.delete();
} else if (dir.isDirectory()) {
File[] entries = dir.listFiles();
for (int i = 0; i < entries.length; i++) {
if (entries[i].isDirectory()) {
recursiveDelete(entries[i]);
}
entries[i].delete();
}
dir.delete();
}
}
static List<File> findFiles(File startDir, FileFilter filter)
throws IOException {
List<File> list = new ArrayList();
findFiles0(startDir, list, filter);
return list;
}
/*
* finds files in the start directory using the the filter, appends
* the files to the dirList.
*/
private static void findFiles0(File startDir, List<File> list,
FileFilter filter) throws IOException {
File[] foundFiles = startDir.listFiles(filter);
list.addAll(Arrays.asList(foundFiles));
File[] dirs = startDir.listFiles(DIR_FILTER);
for (File dir : dirs) {
findFiles0(dir, list, filter);
}
}
static void close(Closeable c) {
if (c == null) {
return;
}
try {
c.close();
} catch (IOException ignore) {
}
}
static void compiler(String... javacCmds) {
if (com.sun.tools.javac.Main.compile(javacCmds) != 0) {
throw new RuntimeException("compilation failed");
}
}
static void jar(String... jargs) {
sun.tools.jar.Main jarTool =
new sun.tools.jar.Main(System.out, System.err, "jartool");
if (!jarTool.run(jargs)) {
throw new RuntimeException("jar command failed");
}
}
static void testWithRepack(File inFile, String... repackOpts) throws IOException {
File cwd = new File(".");
// pack using --repack in native mode
File nativejarFile = new File(cwd, "out-n" + Utils.JAR_FILE_EXT);
repack(inFile, nativejarFile, false, repackOpts);
doCompareVerify(inFile, nativejarFile);
// ensure bit compatibility between the unpacker variants
File javajarFile = new File(cwd, "out-j" + Utils.JAR_FILE_EXT);
repack(inFile, javajarFile, true, repackOpts);
doCompareBitWise(javajarFile, nativejarFile);
}
static List<String> repack(File inFile, File outFile,
boolean disableNative, String... extraOpts) {
List<String> cmdList = new ArrayList<>();
cmdList.clear();
cmdList.add(Utils.getJavaCmd());
cmdList.add("-ea");
cmdList.add("-esa");
if (disableNative) {
cmdList.add("-Dcom.sun.java.util.jar.pack.disable.native=true");
}
cmdList.add("com.sun.java.util.jar.pack.Driver");
cmdList.add("--repack");
if (extraOpts != null) {
for (String opt: extraOpts) {
cmdList.add(opt);
}
}
cmdList.add(outFile.getName());
cmdList.add(inFile.getName());
return Utils.runExec(cmdList);
}
// given a jar file foo.jar will write to foo.pack
static void pack(JarFile jarFile, File packFile) throws IOException {
Pack200.Packer packer = Pack200.newPacker();
Map<String, String> p = packer.properties();
// Take the time optimization vs. space
p.put(packer.EFFORT, "1"); // CAUTION: do not use 0.
// Make the memory consumption as effective as possible
p.put(packer.SEGMENT_LIMIT, "10000");
// ignore all JAR deflation requests to save time
p.put(packer.DEFLATE_HINT, packer.FALSE);
// save the file ordering of the original JAR
p.put(packer.KEEP_FILE_ORDER, packer.TRUE);
FileOutputStream fos = null;
try {
// Write out to a jtreg scratch area
fos = new FileOutputStream(packFile);
// Call the packer
packer.pack(jarFile, fos);
} finally {
close(fos);
}
}
// uses java unpacker, slow but useful to discover issues with the packer
static void unpackj(File inFile, JarOutputStream jarStream)
throws IOException {
unpack0(inFile, jarStream, true);
}
// uses native unpacker using the java APIs
static void unpackn(File inFile, JarOutputStream jarStream)
throws IOException {
unpack0(inFile, jarStream, false);
}
// given a packed file, create the jar file in the current directory.
private static void unpack0(File inFile, JarOutputStream jarStream,
boolean useJavaUnpack) throws IOException {
// Unpack the files
Pack200.Unpacker unpacker = Pack200.newUnpacker();
Map<String, String> props = unpacker.properties();
if (useJavaUnpack) {
props.put("com.sun.java.util.jar.pack.disable.native", "true");
}
// Call the unpacker
unpacker.unpack(inFile, jarStream);
}
static byte[] getBuffer(ZipFile zf, ZipEntry ze) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte buf[] = new byte[8192];
InputStream is = null;
try {
is = zf.getInputStream(ze);
int n = is.read(buf);
while (n > 0) {
baos.write(buf, 0, n);
n = is.read(buf);
}
return baos.toByteArray();
} finally {
close(is);
}
}
static ArrayList<String> getZipFileEntryNames(ZipFile z) {
ArrayList<String> out = new ArrayList();
for (ZipEntry ze : Collections.list(z.entries())) {
out.add(ze.getName());
}
return out;
}
static List<String> runExec(List cmdsList) {
return runExec(cmdsList, null);
}
static List<String> runExec(List cmdsList, Map penv) {
ArrayList<String> alist = new ArrayList();
ProcessBuilder pb =
new ProcessBuilder(cmdsList);
Map<String, String> env = pb.environment();
if (penv != null && !penv.isEmpty()) {
env.putAll(penv);
}
pb.directory(new File("."));
dirlist(new File("."));
for (String x : cmdsList) {
System.out.print(x + " ");
}
System.out.println("");
int retval = 0;
Process p = null;
InputStreamReader ir = null;
BufferedReader rd = null;
InputStream is = null;
try {
pb.redirectErrorStream(true);
p = pb.start();
is = p.getInputStream();
ir = new InputStreamReader(is);
rd = new BufferedReader(ir, 8192);
String in = rd.readLine();
while (in != null) {
alist.add(in);
System.out.println(in);
in = rd.readLine();
}
retval = p.waitFor();
if (retval != 0) {
throw new RuntimeException("process failed with non-zero exit");
}
} catch (Exception ex) {
throw new RuntimeException(ex.getMessage());
} finally {
close(rd);
close(ir);
close(is);
if (p != null) {
p.destroy();
}
}
return alist;
}
static String getUnpack200Cmd() {
return getAjavaCmd("unpack200");
}
static String getPack200Cmd() {
return getAjavaCmd("pack200");
}
static String getJavaCmd() {
return getAjavaCmd("java");
}
static String getAjavaCmd(String cmdStr) {
File binDir = new File(JavaHome, "bin");
File unpack200File = IsWindows
? new File(binDir, cmdStr + ".exe")
: new File(binDir, cmdStr);
String cmd = unpack200File.getAbsolutePath();
if (!unpack200File.canExecute()) {
throw new RuntimeException("please check" +
cmd + " exists and is executable");
}
return cmd;
}
private static List<File> locaterCache = null;
// search the source dir and jdk dir for requested file and returns
// the first location it finds.
static File locateJar(String name) {
try {
if (locaterCache == null) {
locaterCache = new ArrayList<File>();
locaterCache.addAll(findFiles(TEST_SRC_DIR, createFilter(JAR_FILE_EXT)));
locaterCache.addAll(findFiles(JavaSDK, createFilter(JAR_FILE_EXT)));
}
for (File f : locaterCache) {
if (f.getName().equals(name)) {
return f;
}
}
throw new IOException("file not found: " + name);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
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