API文档里有没有ExtClassLoader和APPClassLoader？ - 黑马程序员技术交流社区

static class AppClassLoader extends URLClassLoader{
public static ClassLoader getAppClassLoader(ClassLoader paramClassLoader)
throws IOException{
String str = System.getProperty("java.class.path");
File[] arrayOfFile = str == null ? new File[0] : Launcher.access$200(str);
return (ClassLoader)AccessController.doPrivileged(new PrivilegedAction(str, arrayOfFile, paramClassLoader)
{
public Launcher.AppClassLoader run() {
URL[] arrayOfURL = this.val$s == null ? new URL[0] : Launcher.access$300(this.val$path);
return new Launcher.AppClassLoader(arrayOfURL, this.val$extcl);
}
});
}
AppClassLoader(URL[] paramArrayOfURL, ClassLoader paramClassLoader){
super(paramClassLoader, Launcher.factory);
}
public Class loadClass(String paramString, boolean paramBoolean) throws ClassNotFoundException{
int i = paramString.lastIndexOf('.');
if (i != -1) {
SecurityManager localSecurityManager = System.getSecurityManager();
if (localSecurityManager != null) {
localSecurityManager.checkPackageAccess(paramString.substring(0, i));
}
}
return super.loadClass(paramString, paramBoolean);
}
protected PermissionCollection getPermissions(CodeSource paramCodeSource){
PermissionCollection localPermissionCollection = super.getPermissions(paramCodeSource);
localPermissionCollection.add(new RuntimePermission("exitVM"));
return localPermissionCollection;
}
private void appendToClassPathForInstrumentation(String paramString){
assert (Thread.holdsLock(this));
super.addURL(Launcher.getFileURL(new File(paramString)));
}
private static AccessControlContext getContext(File[] paramArrayOfFile)throws MalformedURLException{
PathPermissions localPathPermissions = new PathPermissions(paramArrayOfFile);
ProtectionDomain localProtectionDomain = new ProtectionDomain(new CodeSource(localPathPermissions.getCodeBase(), (Certificate[])null), localPathPermissions);
AccessControlContext localAccessControlContext = new AccessControlContext(new ProtectionDomain[] { localProtectionDomain });
return localAccessControlContext;
}
static
{
ClassLoader.registerAsParallelCapable();
}
}

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static class ExtClassLoader extends URLClassLoader
{
public static ExtClassLoader getExtClassLoader() throws IOException{
File[] arrayOfFile = getExtDirs();
try{
return (ExtClassLoader)AccessController.doPrivileged(new PrivilegedExceptionAction(arrayOfFile)
{
public Launcher.ExtClassLoader run() throws IOException {
int i = this.val$dirs.length;
for (int j = 0; j < i; j++) {
MetaIndex.registerDirectory(this.val$dirs[j]);
}
return new Launcher.ExtClassLoader(this.val$dirs);
} } );
} catch (PrivilegedActionException localPrivilegedActionException) {
}
throw ((IOException)localPrivilegedActionException.getException());
}
void addExtURL(URL paramURL)
{
super.addURL(paramURL);
}
public ExtClassLoader(File[] paramArrayOfFile)
throws IOException
{
super(null, Launcher.factory);
}
private static File[] getExtDirs() {
String str = System.getProperty("java.ext.dirs");
File[] arrayOfFile;
if (str != null) {
StringTokenizer localStringTokenizer = new StringTokenizer(str, File.pathSeparator);
int i = localStringTokenizer.countTokens();
arrayOfFile = new File[i];
for (int j = 0; j < i; j++)
arrayOfFile[j] = new File(localStringTokenizer.nextToken());
}
else {
arrayOfFile = new File[0];
}
return arrayOfFile;
}
private static URL[] getExtURLs(File[] paramArrayOfFile) throws IOException {
Vector localVector = new Vector();
for (int i = 0; i < paramArrayOfFile.length; i++) {
String[] arrayOfString = paramArrayOfFile[i].list();
if (arrayOfString != null) {
for (int j = 0; j < arrayOfString.length; j++) {
if (!arrayOfString[j].equals("meta-index")) {
File localFile = new File(paramArrayOfFile[i], arrayOfString[j]);
localVector.add(Launcher.getFileURL(localFile));
}
}
}
}
URL[] arrayOfURL = new URL[localVector.size()];
localVector.copyInto(arrayOfURL);
return arrayOfURL;
}
public String findLibrary(String paramString)
{
paramString = System.mapLibraryName(paramString);
URL[] arrayOfURL = super.getURLs();
Object localObject = null;
for (int i = 0; i < arrayOfURL.length; i++)
{
File localFile1 = new File(arrayOfURL[i].getPath()).getParentFile();
if ((localFile1 != null) && (!localFile1.equals(localObject)))
{
String str = VM.getSavedProperty("os.arch");
if (str != null) {
localFile2 = new File(new File(localFile1, str), paramString);
if (localFile2.exists()) {
return localFile2.getAbsolutePath();
}
}
File localFile2 = new File(localFile1, paramString);
if (localFile2.exists()) {
return localFile2.getAbsolutePath();
}
}
localObject = localFile1;
}
return null;
}
private static AccessControlContext getContext(File[] paramArrayOfFile)
throws IOException
{
PathPermissions localPathPermissions = new PathPermissions(paramArrayOfFile);
ProtectionDomain localProtectionDomain = new ProtectionDomain(new CodeSource(localPathPermissions.getCodeBase(), (Certificate[])null), localPathPermissions);
AccessControlContext localAccessControlContext = new AccessControlContext(new ProtectionDomain[] { localProtectionDomain });
return localAccessControlContext;
}
static
{
ClassLoader.registerAsParallelCapable();
}
}

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