java.security: public class: SecureClassLoader

java.security
public class: SecureClassLoader [javadoc | source]

java.lang.Object
   java.lang.ClassLoader
      java.security.SecureClassLoader

Direct Known Subclasses:
SystemClassLoader, URLClassLoader, SubURLClassLoader

{@code SecureClassLoader} represents a {@code ClassLoader} which associates the classes it loads with a code source and provide mechanisms to allow the relevant permissions to be retrieved.

Fields inherited from java.lang.ClassLoader:
classAssertionStatus, classSigners, defaultAssertionStatus, clearAssertionStatus, packageAssertionStatus

Constructor:

Constructor:
protected SecureClassLoader() { super(); } Constructs a new instance of {@code SecureClassLoader}. The default parent {@code ClassLoader} is used. If a {@code SecurityManager} is installed, code calling this constructor needs the {@code SecurityPermission} {@code checkCreateClassLoader} to be granted, otherwise a {@code SecurityException} will be thrown. Throws: `SecurityException` - if a {@code SecurityManager} is installed and the caller does not have permission to invoke this constructor.
protected SecureClassLoader(ClassLoader parent) { super(parent); } Constructs a new instance of {@code SecureClassLoader} with the specified parent {@code ClassLoader}. If a {@code SecurityManager} is installed, code calling this constructor needs the {@code SecurityPermission} {@code checkCreateClassLoader} to be granted, otherwise a {@code SecurityException} will be thrown. Parameters: `parent` - the parent {@code ClassLoader}. Throws: `SecurityException` - if a {@code SecurityManager} is installed and the caller does not have permission to invoke this constructor.

 protected SecureClassLoader() {
        super();
}

Constructs a new instance of {@code SecureClassLoader}. The default parent {@code ClassLoader} is used.

If a {@code SecurityManager} is installed, code calling this constructor needs the {@code SecurityPermission} {@code checkCreateClassLoader} to be granted, otherwise a {@code SecurityException} will be thrown.

Throws:

SecurityException - if a {@code SecurityManager} is installed and the caller does not have permission to invoke this constructor.

 protected SecureClassLoader(ClassLoader parent) {
        super(parent);
}

Parameters:

parent - the parent {@code ClassLoader}.

Throws:

SecurityException - if a {@code SecurityManager} is installed and the caller does not have permission to invoke this constructor.

Method from java.security.SecureClassLoader Summary:
defineClass, defineClass, getPermissions

Methods from java.lang.ClassLoader:
clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getStackClassLoader, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, isSameOrAncestor, isSystemClassLoader, loadClass, loadClass, loadLibrary, loadLibraryWithClassLoader, registerInitiatedClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods from java.lang.ClassLoader:

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getStackClassLoader, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, isSameOrAncestor, isSystemClassLoader, loadClass, loadClass, loadLibrary, loadLibraryWithClassLoader, registerInitiatedClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

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

Method from java.security.SecureClassLoader Detail:
protected final Class<?> defineClass(String name, ByteBuffer b, CodeSource cs) { //FIXME 1.5 - remove b.array(), call super.defineClass(,ByteBuffer,) // directly byte[] data = b.array(); return cs == null ? defineClass(name, data, 0, data.length) : defineClass(name, data, 0, data.length, getPD(cs)); } Constructs a new class from an array of bytes containing a class definition in class file format with an optional {@code CodeSource}.
protected final Class<?> defineClass(String name, byte[] b, int off, int len, CodeSource cs) { return cs == null ? defineClass(name, b, off, len) : defineClass(name, b, off, len, getPD(cs)); } Constructs a new class from an array of bytes containing a class definition in class file format with an optional {@code CodeSource}.
protected PermissionCollection getPermissions(CodeSource codesource) { // Do nothing by default, ProtectionDomain will take care about // permissions in dynamic return new Permissions(); } Returns the {@code PermissionCollection} for the specified {@code CodeSource}.

Method from java.security.SecureClassLoader Detail:

 protected final Class<?> defineClass(String name,
    ByteBuffer b,
    CodeSource cs) {
        //FIXME 1.5 - remove b.array(), call super.defineClass(,ByteBuffer,)
        // directly
        byte[] data = b.array();
        return cs == null ? defineClass(name, data, 0, data.length)
                : defineClass(name, data, 0, data.length, getPD(cs));
}

Constructs a new class from an array of bytes containing a class definition in class file format with an optional {@code CodeSource}.

 protected final Class<?> defineClass(String name,
    byte[] b,
    int off,
    int len,
    CodeSource cs) {
        return cs == null ? defineClass(name, b, off, len) : defineClass(name,
                b, off, len, getPD(cs));
}

Constructs a new class from an array of bytes containing a class definition in class file format with an optional {@code CodeSource}.

 protected PermissionCollection getPermissions(CodeSource codesource) {
        // Do nothing by default, ProtectionDomain will take care about
        // permissions in dynamic
        return new Permissions();
}

Returns the {@code PermissionCollection} for the specified {@code CodeSource}.