protected void addPathFile(final File pathComponent) throws IOException {
if (!this.pathComponents.contains(pathComponent)) {
this.pathComponents.addElement(pathComponent);
}
if (pathComponent.isDirectory()) {
return;
}
final String absPathPlusTimeAndLength =
pathComponent.getAbsolutePath()
+ pathComponent.lastModified()
+ "-"
+ pathComponent.length();
String classpath = AntClassLoader.pathMap.get(absPathPlusTimeAndLength);
if (classpath == null) {
JarFile jarFile = null;
try {
jarFile = new JarFile(pathComponent);
final Manifest manifest = jarFile.getManifest();
if (manifest == null) {
return;
}
classpath = manifest.getMainAttributes().getValue(Attributes.Name.CLASS_PATH);
} finally {
if (jarFile != null) {
jarFile.close();
}
}
if (classpath == null) {
classpath = "";
}
AntClassLoader.pathMap.put(absPathPlusTimeAndLength, classpath);
}
if (!"".equals(classpath)) {
final URL baseURL = AntClassLoader.FILE_UTILS.getFileURL(pathComponent);
final StringTokenizer st = new StringTokenizer(classpath);
while (st.hasMoreTokens()) {
final String classpathElement = st.nextToken();
final URL libraryURL = new URL(baseURL, classpathElement);
if (!libraryURL.getProtocol().equals("file")) {
this.log(
"Skipping jar library "
+ classpathElement
+ " since only relative URLs are supported by this"
+ " loader",
3);
} else {
final String decodedPath = Locator.decodeUri(libraryURL.getFile());
final File libraryFile = new File(decodedPath);
if (!libraryFile.exists() || this.isInPath(libraryFile)) {
continue;
}
this.addPathFile(libraryFile);
}
}
}
}
/** Generates the transitive closure of the Class-Path attribute for the specified jar file. */
List<String> getJarPath(String jar) throws IOException {
List<String> files = new ArrayList<String>();
files.add(jar);
jarPaths.add(jar);
// take out the current path
String path = jar.substring(0, Math.max(0, jar.lastIndexOf('/') + 1));
// class path attribute will give us jar file name with
// '/' as separators, so we need to change them to the
// appropriate one before we open the jar file.
JarFile rf = new JarFile(jar.replace('/', File.separatorChar));
if (rf != null) {
Manifest man = rf.getManifest();
if (man != null) {
Attributes attr = man.getMainAttributes();
if (attr != null) {
String value = attr.getValue(Attributes.Name.CLASS_PATH);
if (value != null) {
StringTokenizer st = new StringTokenizer(value);
while (st.hasMoreTokens()) {
String ajar = st.nextToken();
if (!ajar.endsWith("/")) { // it is a jar file
ajar = path.concat(ajar);
/* check on cyclic dependency */
if (!jarPaths.contains(ajar)) {
files.addAll(getJarPath(ajar));
}
}
}
}
}
}
}
rf.close();
return files;
}
public static void main(String[] args) throws IOException {
List /*<String>*/ classes = new ArrayList();
String origJavaHome = System.getProperty("java.home");
String javaHome = origJavaHome.toLowerCase();
if (javaHome.endsWith("jre")) {
origJavaHome = origJavaHome.substring(0, origJavaHome.length() - 4);
javaHome = javaHome.substring(0, javaHome.length() - 4);
}
for (int i = 0; i < args.length; i++) {
try {
File file = new File(args[i]);
BufferedReader reader = new BufferedReader(new FileReader(file));
String line = null;
while ((line = reader.readLine()) != null) {
StringTokenizer tok = new StringTokenizer(line, "[ \t\n\r\f");
if (tok.hasMoreTokens()) {
String t = tok.nextToken();
// Understand only "Loading" from -XX:+TraceClassLoadingPreorder.
// This ignores old "Loaded" from -verbose:class to force correct
// classlist generation on Mustang.
if (t.equals("Loading")) {
t = tok.nextToken();
t = t.replace('.', '/');
// Check to make sure it came from the boot class path
if (tok.hasMoreTokens()) {
String tmp = tok.nextToken();
if (tmp.equals("from")) {
if (tok.hasMoreTokens()) {
tmp = tok.nextToken().toLowerCase();
// System.err.println("Loaded " + t + " from " + tmp);
if (tmp.startsWith(javaHome)) {
// OK, remember this class for later
classes.add(t);
}
}
}
}
}
}
}
} catch (IOException e) {
System.err.println("Error reading file " + args[i]);
throw (e);
}
}
Set /*<String>*/ seenClasses = new HashSet();
for (Iterator iter = classes.iterator(); iter.hasNext(); ) {
String str = (String) iter.next();
if (seenClasses.add(str)) {
System.out.println(str);
}
}
// Try to complete certain packages
// Note: not using this new code yet; need to consider whether the
// footprint increase is worth any startup gains
// Note also that the packages considered below for completion are
// (obviously) platform-specific
// JarFile rtJar = new JarFile(origJavaHome + File.separator +
// "jre" + File.separator +
// "lib" + File.separator +
// "rt.jar");
// completePackage(seenClasses, rtJar, "java/awt");
// completePackage(seenClasses, rtJar, "sun/awt");
// completePackage(seenClasses, rtJar, "sun/awt/X11");
// completePackage(seenClasses, rtJar, "java/awt/im/spi");
// completePackage(seenClasses, rtJar, "java/lang");
}
