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Added in API level 1

Summary: Protected Ctors | Protected Methods | Inherited Methods | [Expand All]

SecureClassLoader

public class SecureClassLoader
extends ClassLoader

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

Known Direct Subclasses

URLClassLoader

This class extends ClassLoader with additional support for defining classes with an associated code source and permissions which are retrieved by the system policy by default.

Summary

Protected constructors
`SecureClassLoader(ClassLoader parent)` Creates a new SecureClassLoader using the specified parent class loader for delegation.
`SecureClassLoader()` Creates a new SecureClassLoader using the default parent class loader for delegation.

Protected methods
`final Class<?>`	`defineClass(String name, byte[] b, int off, int len, CodeSource cs)` Converts an array of bytes into an instance of class Class, with an optional CodeSource.
`final Class<?>`	`defineClass(String name, ByteBuffer b, CodeSource cs)` Converts a `ByteBuffer` into an instance of class `Class`, with an optional CodeSource.
`PermissionCollection`	`getPermissions(CodeSource codesource)` Returns the permissions for the given CodeSource object.

Inherited methods

From class


  
    java.lang.ClassLoader

`void`	`clearAssertionStatus()` Sets the default assertion status for this class loader to `false` and discards any package defaults or class assertion status settings associated with the class loader.
`final Class<?>`	`defineClass(String name, byte[] b, int off, int len, ProtectionDomain protectionDomain)` Converts an array of bytes into an instance of class `Class`, with an optional `ProtectionDomain`.
`final Class<?>`	`defineClass(String name, ByteBuffer b, ProtectionDomain protectionDomain)` Converts a `ByteBuffer` into an instance of class `Class`, with an optional `ProtectionDomain`.
`final Class<?>`	`defineClass(byte[] b, int off, int len)` This method was deprecated in API level 1. Replaced by `defineClass(String, byte[], int, int)`
`final Class<?>`	`defineClass(String name, byte[] b, int off, int len)` Converts an array of bytes into an instance of class `Class`.
`Package`	`definePackage(String name, String specTitle, String specVersion, String specVendor, String implTitle, String implVersion, String implVendor, URL sealBase)` Defines a package by name in this `ClassLoader`.
`Class<?>`	`findClass(String name)` Finds the class with the specified binary name.
`String`	`findLibrary(String libname)` Returns the absolute path name of a native library.
`final Class<?>`	`findLoadedClass(String name)` Returns the class with the given binary name if this loader has been recorded by the Java virtual machine as an initiating loader of a class with that binary name.
`URL`	`findResource(String name)` Finds the resource with the given name.
`Enumeration<URL>`	`findResources(String name)` Returns an enumeration of `URL` objects representing all the resources with the given name.
`final Class<?>`	`findSystemClass(String name)` Finds a class with the specified binary name, loading it if necessary.
`Package`	`getPackage(String name)` Returns a `Package` that has been defined by this class loader or any of its ancestors.
`Package[]`	`getPackages()` Returns all of the `Packages` defined by this class loader and its ancestors.
`final ClassLoader`	`getParent()` Returns the parent class loader for delegation.
`URL`	`getResource(String name)` Finds the resource with the given name.
`InputStream`	`getResourceAsStream(String name)` Returns an input stream for reading the specified resource.
`Enumeration<URL>`	`getResources(String name)` Finds all the resources with the given name.
`static ClassLoader`	`getSystemClassLoader()` Returns the system class loader for delegation.
`static URL`	`getSystemResource(String name)` Find a resource of the specified name from the search path used to load classes.
`static InputStream`	`getSystemResourceAsStream(String name)` Open for reading, a resource of the specified name from the search path used to load classes.
`static Enumeration<URL>`	`getSystemResources(String name)` Finds all resources of the specified name from the search path used to load classes.
`Class<?>`	`loadClass(String name, boolean resolve)` Loads the class with the specified binary name.
`Class<?>`	`loadClass(String name)` Loads the class with the specified binary name.
`static boolean`	`registerAsParallelCapable()` Registers the caller as parallel capable.
`final void`	`resolveClass(Class<?> c)` Links the specified class.
`void`	`setClassAssertionStatus(String className, boolean enabled)` Sets the desired assertion status for the named top-level class in this class loader and any nested classes contained therein.
`void`	`setDefaultAssertionStatus(boolean enabled)` Sets the default assertion status for this class loader.
`void`	`setPackageAssertionStatus(String packageName, boolean enabled)` Sets the package default assertion status for the named package.
`final void`	`setSigners(Class<?> c, Object[] signers)` Sets the signers of a class.

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Protected constructors

SecureClassLoader

Added in API level 1

SecureClassLoader (ClassLoader parent)

Creates a new SecureClassLoader using the specified parent class loader for delegation.

If there is a security manager, this method first calls the security manager's checkCreateClassLoader method to ensure creation of a class loader is allowed.

Parameters
`parent`	`ClassLoader`: the parent ClassLoader

Throws
`SecurityException`	if a security manager exists and its `checkCreateClassLoader` method doesn't allow creation of a class loader.

See also:

checkCreateClassLoader()

SecureClassLoader

Added in API level 1

SecureClassLoader ()

Creates a new SecureClassLoader using the default parent class loader for delegation.

If there is a security manager, this method first calls the security manager's checkCreateClassLoader method to ensure creation of a class loader is allowed.

Throws
`SecurityException`	if a security manager exists and its `checkCreateClassLoader` method doesn't allow creation of a class loader.

See also:

checkCreateClassLoader()

Protected methods

defineClass

Added in API level 1

Class<?> defineClass (String name, 
                byte[] b, 
                int off, 
                int len, 
                CodeSource cs)

Converts an array of bytes into an instance of class Class, with an optional CodeSource. Before the class can be used it must be resolved.

If a non-null CodeSource is supplied a ProtectionDomain is constructed and associated with the class being defined.

Parameters
`name`	`String`: the expected name of the class, or `null` if not known, using '.' and not '/' as the separator and without a trailing ".class" suffix.
`b`	`byte`: the bytes that make up the class data. The bytes in positions `off` through `off+len-1` should have the format of a valid class file as defined by The Java™ Virtual Machine Specification.
`off`	`int`: the start offset in `b` of the class data
`len`	`int`: the length of the class data
`cs`	`CodeSource`: the associated CodeSource, or `null` if none

Returns
`Class<?>`	the `Class` object created from the data, and optional CodeSource.

Throws
`ClassFormatError`	if the data did not contain a valid class
`IndexOutOfBoundsException`	if either `off` or `len` is negative, or if `off+len` is greater than `b.length`.
`SecurityException`	if an attempt is made to add this class to a package that contains classes that were signed by a different set of certificates than this class, or if the class name begins with "java.".

defineClass

Added in API level 1

Class<?> defineClass (String name, 
                ByteBuffer b, 
                CodeSource cs)

Converts a ByteBuffer into an instance of class Class, with an optional CodeSource. Before the class can be used it must be resolved.

If a non-null CodeSource is supplied a ProtectionDomain is constructed and associated with the class being defined.

Parameters
`name`	`String`: the expected name of the class, or `null` if not known, using '.' and not '/' as the separator and without a trailing ".class" suffix.
`b`	`ByteBuffer`: the bytes that make up the class data. The bytes from positions `b.position()` through `b.position() + b.limit() -1` should have the format of a valid class file as defined by The Java™ Virtual Machine Specification.
`cs`	`CodeSource`: the associated CodeSource, or `null` if none

Returns
`Class<?>`	the `Class` object created from the data, and optional CodeSource.

Throws
`ClassFormatError`	if the data did not contain a valid class
`SecurityException`	if an attempt is made to add this class to a package that contains classes that were signed by a different set of certificates than this class, or if the class name begins with "java.".

getPermissions

Added in API level 1

PermissionCollection getPermissions (CodeSource codesource)

Returns the permissions for the given CodeSource object.

This method is invoked by the defineClass method which takes a CodeSource as an argument when it is constructing the ProtectionDomain for the class being defined.

Parameters
`codesource`	`CodeSource`: the codesource.

Returns
`PermissionCollection`	the permissions granted to the codesource.

Interfaces

Classes

Enums

Exceptions

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SecureClassLoader

Summary

Protected constructors

Protected methods

Inherited methods

Protected constructors

SecureClassLoader

SecureClassLoader

Protected methods

defineClass

defineClass

getPermissions