sun.misc: static class: Launcher.AppClassLoader

sun.misc
static class: Launcher.AppClassLoader [javadoc | source]

java.lang.Object
   java.lang.ClassLoader
      java.security.SecureClassLoader
         java.net.URLClassLoader
            sun.misc.Launcher$AppClassLoader

The class loader used for loading from java.class.path. runs in a restricted security context.

Fields inherited from java.net.URLClassLoader:
ucp

Fields inherited from java.lang.ClassLoader:
nocerts, classAssertionStatus

Constructor:
AppClassLoader(URL[] urls, ClassLoader parent) { super(urls, parent, factory); }

Method from sun.misc.Launcher$AppClassLoader Summary:
getAppClassLoader, getPermissions, loadClass

Methods from java.net.URLClassLoader:
access$000, access$100, addURL, definePackage, findClass, findResource, findResources, getPermissions, getURLs, newInstance, newInstance

Methods from java.security.SecureClassLoader:
defineClass, defineClass, getPermissions

Methods from java.lang.ClassLoader:
access$000, access$100, addClass, clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, desiredAssertionStatus, findClass, findLibrary, findLoadedClass, findNative, findResource, findResources, findSystemClass, getBootstrapClassPath, getCallerClassLoader, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, isAncestor, loadClass, loadClass, loadLibrary, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods from java.lang.ClassLoader:

access$000, access$100, addClass, clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, desiredAssertionStatus, findClass, findLibrary, findLoadedClass, findNative, findResource, findResources, findSystemClass, getBootstrapClassPath, getCallerClassLoader, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, isAncestor, loadClass, loadClass, loadLibrary, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from sun.misc.Launcher$AppClassLoader Detail:
public static ClassLoader getAppClassLoader(ClassLoader extcl) throws IOException { final String s = System.getProperty("java.class.path"); final File[] path = (s == null) ? new File[0] : getClassPath(s); // Note: on bugid 4256530 // Prior implementations of this doPrivileged() block supplied // a rather restrictive ACC via a call to the private method // AppClassLoader.getContext(). This proved overly restrictive // when loading classes. Specifically it prevent // accessClassInPackage.sun.* grants from being honored. // return AccessController.doPrivileged( new PrivilegedAction< AppClassLoader >() { public AppClassLoader run() { URL[] urls = (s == null) ? new URL[0] : pathToURLs(path); return new AppClassLoader(urls, extcl); } }); }
protected PermissionCollection getPermissions(CodeSource codesource) { PermissionCollection perms = super.getPermissions(codesource); perms.add(new RuntimePermission("exitVM")); return perms; } allow any classes loaded from classpath to exit the VM.
public Class loadClass(String name, boolean resolve) throws ClassNotFoundException { int i = name.lastIndexOf('.'); if (i != -1) { SecurityManager sm = System.getSecurityManager(); if (sm != null) { sm.checkPackageAccess(name.substring(0, i)); } } return (super.loadClass(name, resolve)); } Override loadClass so we can checkPackageAccess.

Method from sun.misc.Launcher$AppClassLoader Detail:

 public static ClassLoader getAppClassLoader(ClassLoader extcl) throws IOException {
            final String s = System.getProperty("java.class.path");
            final File[] path = (s == null) ? new File[0] : getClassPath(s);
            // Note: on bugid 4256530
            // Prior implementations of this doPrivileged() block supplied
            // a rather restrictive ACC via a call to the private method
            // AppClassLoader.getContext(). This proved overly restrictive
            // when loading  classes. Specifically it prevent
            // accessClassInPackage.sun.* grants from being honored.
            //
            return AccessController.doPrivileged(
                new PrivilegedAction< AppClassLoader >() {
                    public AppClassLoader run() {
                    URL[] urls =
                        (s == null) ? new URL[0] : pathToURLs(path);
                    return new AppClassLoader(urls, extcl);
                }
            });
}

 protected PermissionCollection getPermissions(CodeSource codesource) {
            PermissionCollection perms = super.getPermissions(codesource);
            perms.add(new RuntimePermission("exitVM"));
            return perms;
}

allow any classes loaded from classpath to exit the VM.

 public Class loadClass(String name,
    boolean resolve) throws ClassNotFoundException {
            int i = name.lastIndexOf('.');
            if (i != -1) {
                SecurityManager sm = System.getSecurityManager();
                if (sm != null) {
                    sm.checkPackageAccess(name.substring(0, i));
                }
            }
            return (super.loadClass(name, resolve));
}

Override loadClass so we can checkPackageAccess.