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.

  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. This method is
provided so that class loaders can be made to ignore any command line or
persistent assertion status settings and "start with a clean slate."

Since: 1.4

  Converts an array of bytes into an instance of class Class.

  Converts an array of bytes into an instance of class Class.
Before the Class can be used it must be resolved. This method
is deprecated in favor of the version that takes a href="java/lang/#name">binary name as its first argument, and is more secure.
Returns: The Class object that was created from the specified class data
Parameters:
- b - 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 - The start offset in b of the class data
- len - The length of the class data
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.
See Also: ClassLoader.loadClass(String, boolean), ClassLoader.resolveClass(Class),

  Converts an array of bytes into an instance of class Class.

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

This method assigns a default ProtectionDomain to the newly defined class. The ProtectionDomain is effectively granted the same set of permissions returned when Policy.getPolicy().getPermissions(new CodeSource(null, null)) is invoked. The default domain is created on the first invocation of defineClass, and re-used on subsequent invocations.

To assign a specific ProtectionDomain to the class, use the defineClass method that takes a ProtectionDomain as one of its arguments.

Returns: The Class object that was created from the specified class data.
Parameters:
- name - The expected binary name of the class, or null if not known
- b - 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 - The start offset in b of the class data
- len - The length of the class data
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 (which is unsigned), or if name begins with "java.".
Since: 1.1
See Also: ClassLoader.loadClass(String, boolean), ClassLoader.resolveClass(Class), CodeSource, SecureClassLoader,

  Converts an array of bytes into an instance of class Class, with an optional CodeSource.

  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.

Returns: the Class object created from the data, and optional CodeSource.
Parameters:
- name - the expected name of the class, or null if not known, using '.' and not '/' as the separator and without a trailing ".class" suffix.
- b - 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 - the start offset in b of the class data
- len - the length of the class data
- cs - the associated CodeSource, or null if none
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.".

  Converts an array of bytes into an instance of class Class, with an optional ProtectionDomain.

  Converts an array of bytes into an instance of class Class, with an optional ProtectionDomain. If the domain is null, then a default domain will be assigned to the class as specified in the documentation for ClassLoader.defineClass(String, byte[], int, int). Before the class can be used it must be resolved.

The first class defined in a package determines the exact set of certificates that all subsequent classes defined in that package must contain. The set of certificates for a class is obtained from the CodeSource within the ProtectionDomain of the class. Any classes added to that package must contain the same set of certificates or a SecurityException will be thrown. Note that if name is null, this check is not performed. You should always pass in the binary name of the class you are defining as well as the bytes. This ensures that the class you are defining is indeed the class you think it is.

The specified name cannot begin with "java.", since all classes in the "java.* packages can only be defined by the bootstrap class loader. If name is not null, it must be equal to the binary name of the class specified by the byte array "b", otherwise a NoClassDefFoundError will be thrown.

Returns: The Class object created from the data, and optional ProtectionDomain.
Parameters:
- name - The expected binary name of the class, or null if not known
- b - 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 - The start offset in b of the class data
- len - The length of the class data
- protectionDomain - The ProtectionDomain of the class
Throws:
- ClassFormatError - If the data did not contain a valid class
- NoClassDefFoundError - If name is not equal to the binary name of the class specified by b
- 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 name begins with "java.".

  Converts a ByteBuffer into an instance of class Class, with an optional CodeSource.

  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.

Returns: the Class object created from the data, and optional CodeSource.
Parameters:
- name - the expected name of the class, or null if not known, using '.' and not '/' as the separator and without a trailing ".class" suffix.
- b - 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 - the associated CodeSource, or null if none
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.".
Since: 1.5

  Converts a ByteBuffer into an instance of class Class, with an optional ProtectionDomain.

  Converts a ByteBuffer into an instance of class Class, with an optional ProtectionDomain. If the domain is null, then a default domain will be assigned to the class as specified in the documentation for ClassLoader.defineClass(String, byte[], int, int). Before the class can be used it must be resolved.

The rules about the first class defined in a package determining the set of certificates for the package, and the restrictions on class names are identical to those specified in the documentation for ClassLoader.defineClass(String, byte[], int, int, ProtectionDomain).

An invocation of this method of the form cl.defineClass(name, bBuffer, pd) yields exactly the same result as the statements

...
byte[] temp = new byte[bBuffer.remaining()];
bBuffer.get(temp);
return cl.defineClass(name, temp, 0, temp.length, pd);

Returns: The Class object created from the data, and optional ProtectionDomain.
Parameters:
- name - The expected binary namenull if not known
- b - 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.
- protectionDomain - The ProtectionDomain of the class, or null.
Throws:
- ClassFormatError - If the data did not contain a valid class.
- NoClassDefFoundError - If name is not equal to the binary name of the class specified by b
- 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 name begins with "java.".
Since: 1.5
See Also: ClassLoader.defineClass(String, byte[], int, int, ProtectionDomain),

  Defines a new package by name in this ClassLoader.

  Defines a new package by name in this ClassLoader. The attributes
contained in the specified Manifest will be used to obtain package
version and sealing information. For sealed packages, the additional
URL specifies the code source URL from which the package was loaded.
Returns: the newly defined Package object
Parameters:
- name - the package name
- man - the Manifest containing package version and sealing information
- url - the code source url for the package, or null if none
Throws:
- IllegalArgumentException - if the package name duplicates an existing package either in this class loader or one of its ancestors

  Defines a package by name in this ClassLoader.

  Defines a package by name in this ClassLoader. This allows
class loaders to define the packages for their classes. Packages must
be created before the class is defined, and package names must be
unique within a class loader and cannot be redefined or changed once
created.

Returns: The newly defined Package object
Parameters:
- name - The package name
- specTitle - The specification title
- specVersion - The specification version
- specVendor - The specification vendor
- implTitle - The implementation title
- implVersion - The implementation version
- implVendor - The implementation vendor
- sealBase - If not null, then this package is sealed with respect to the given code source {@link java.net.URL URL} object. Otherwise, the package is not sealed.
Throws:
- IllegalArgumentException - If package name duplicates an existing package either in this class loader or one of its ancestors
Since: 1.2

  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.

  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. Otherwise
null is returned.

Returns: The Class object, or null if the class has not been loaded
Parameters:
- name - The binary name of the class
Since: 1.1

  Finds the resource with the specified name on the URL search path.

  Finds the resource with the specified name on the URL search path.
Returns: a URL for the resource, or null if the resource could not be found.
Parameters:
- name - the name of the resource

  Returns an Enumeration of URLs representing all of the resources on the URL search path having the specified name.

  Returns an Enumeration of URLs representing all of the resources
on the URL search path having the specified name.
Returns: an Enumeration of URLs
Parameters:
- name - the resource name
Throws:
- IOException - if an I/O exception occurs

  Finds a class with the specified binary name, loading it if necessary.

  Finds a class with the specified binary name, loading it if necessary.

This method loads the class through the system class loader (see ClassLoader.getSystemClassLoader()). The Class object returned might have more than one ClassLoader associated with it. Subclasses of ClassLoader need not usually invoke this method, because most class loaders need to override just ClassLoader.findClass(String).

Returns: The Class object for the specified name
Parameters:
- name - The binary name of the class
Throws:
- ClassNotFoundException - If the class could not be found
See Also: ClassLoader.ClassLoader(ClassLoader), ClassLoader.getParent(),

  Returns a Package that has been defined by this class loader or any of its ancestors.

  Returns a Package that has been defined by this class loader
or any of its ancestors.

Returns: The Package corresponding to the given name, or null if not found
Parameters:
- name - The package name
Since: 1.2

  Returns all of the Packages defined by this class loader and its ancestors.

  Returns all of the Packages defined by this class loader and
its ancestors.

Returns: The array of Package objects defined by this ClassLoader
Since: 1.2

  Returns the parent class loader for delegation.

  Returns the parent class loader for delegation. Some implementations may use null to represent the bootstrap class loader. This method will return null in such implementations if this class loader's parent is the bootstrap class loader.

If a security manager is present, and the invoker's class loader is not null and is not an ancestor of this class loader, then this method invokes the security manager's checkPermission method with a RuntimePermission("getClassLoader") permission to verify access to the parent class loader is permitted. If not, a SecurityException will be thrown.

Returns: The parent ClassLoader
Throws:
- SecurityException - If a security manager exists and its checkPermission method doesn't allow access to this class loader's parent class loader.
Since: 1.2

  Returns the permissions for the given codesource object.

  Returns the permissions for the given codesource object. The implementation of this method first calls super.getPermissions and then adds permissions based on the URL of the codesource.

If the protocol of this URL is "jar", then the permission granted is based on the permission that is required by the URL of the Jar file.

If the protocol is "file" and the path specifies a file, then permission to read that file is granted. If protocol is "file" and the path is a directory, permission is granted to read all files and (recursively) all files and subdirectories contained in that directory.

If the protocol is not "file", then to connect to and accept connections from the URL's host is granted.
Returns: the permissions granted to the codesource
Parameters:
- codesource - the codesource

  Finds the resource with the given name.

  Finds the resource with the given name. A resource is some data (images, audio, text, etc) that can be accessed by class code in a way that is independent of the location of the code.

The name of a resource is a '/'-separated path name that identifies the resource.

This method will first search the parent class loader for the resource; if the parent is null the path of the class loader built-in to the virtual machine is searched. That failing, this method will invoke ClassLoader.findResource(String) to find the resource.

Returns: A URL object for reading the resource, or null if the resource could not be found or the invoker doesn't have adequate privileges to get the resource.
Parameters:
- name - The resource name
Since: 1.1

  Returns an input stream for reading the specified resource.

  Returns an input stream for reading the specified resource.

The search order is described in the documentation for ClassLoader.getResource(String).

Returns: An input stream for reading the resource, or null if the resource could not be found
Parameters:
- name - The resource name
Since: 1.1

  Finds all the resources with the given name.

  Finds all the resources with the given name. A resource is some data (images, audio, text, etc) that can be accessed by class code in a way that is independent of the location of the code.

The name of a resource is a /-separated path name that identifies the resource.

The search order is described in the documentation for ClassLoader.getResource(String).

Returns: An enumeration of {@link java.net.URL URL} objects for the resource. If no resources could be found, the enumeration will be empty. Resources that the class loader doesn't have access to will not be in the enumeration.
Parameters:
- name - The resource name
Throws:
- IOException - If I/O errors occur
Since: 1.2
See Also: ClassLoader.findResources(String),

  Returns the system class loader for delegation.

  Returns the system class loader for delegation. This is the default delegation parent for new ClassLoader instances, and is typically the class loader used to start the application.

This method is first invoked early in the runtime's startup sequence, at which point it creates the system class loader and sets it as the context class loader of the invoking Thread.

The default system class loader is an implementation-dependent instance of this class.

If the system property "java.system.class.loader" is defined when this method is first invoked then the value of that property is taken to be the name of a class that will be returned as the system class loader. The class is loaded using the default system class loader and must define a public constructor that takes a single parameter of type ClassLoader which is used as the delegation parent. An instance is then created using this constructor with the default system class loader as the parameter. The resulting class loader is defined to be the system class loader.

If a security manager is present, and the invoker's class loader is not null and the invoker's class loader is not the same as or an ancestor of the system class loader, then this method invokes the security manager's checkPermission method with a RuntimePermission("getClassLoader") permission to verify access to the system class loader. If not, a SecurityException will be thrown.

Returns: The system ClassLoader for delegation, or null if none
Throws:
- SecurityException - If a security manager exists and its checkPermission method doesn't allow access to the system class loader.
- IllegalStateException - If invoked recursively during the construction of the class loader specified by the "java.system.class.loader" property.
- Error - If the system property "java.system.class.loader" is defined but the named class could not be loaded, the provider class does not define the required constructor, or an exception is thrown by that constructor when it is invoked. The underlying cause of the error can be retrieved via the {@link Throwable#getCause()} method.

  Find a resource of the specified name from the search path used to load classes.

  Find a resource of the specified name from the search path used to load
classes. This method locates the resource through the system class
loader (see ClassLoader.getSystemClassLoader()).

Returns: A {@link java.net.URL URL} object for reading the resource, or null if the resource could not be found
Parameters:
- name - The resource name
Since: 1.1

  Open for reading, a resource of the specified name from the search path used to load classes.

  Open for reading, a resource of the specified name from the search path
used to load classes. This method locates the resource through the
system class loader (see ClassLoader.getSystemClassLoader()).

Returns: An input stream for reading the resource, or null if the resource could not be found
Parameters:
- name - The resource name
Since: 1.1

  Finds all resources of the specified name from the search path used to load classes.

  Finds all resources of the specified name from the search path used to load classes. The resources thus found are returned as an Enumeration of URL objects.

The search order is described in the documentation for ClassLoader.getSystemResource(String).

Returns: An enumeration of resource {@link java.net.URL URL} objects
Parameters:
- name - The resource name
Throws:
- IOException - If I/O errors occur
Since: 1.2

  Loads the class with the specified binary name.

  Loads the class with the specified binary name.
This method searches for classes in the same manner as the ClassLoader.loadClass(String, boolean) method. It is invoked by the Java virtual
machine to resolve class references. Invoking this method is equivalent
to invoking loadClass(name,
false).

Returns: The resulting Class object
Parameters:
- name - The binary name of the class
Throws:
- ClassNotFoundException - If the class was not found

  Loads the class with the specified binary name.

  Loads the class with the specified binary name. The default implementation of this method searches for classes in the following order:

1. Invoke ClassLoader.findLoadedClass(String) to check if the class has already been loaded.

2. Invoke the loadClass method on the parent class loader. If the parent is null the class loader built-in to the virtual machine is used, instead.

3. Invoke the ClassLoader.findClass(String) method to find the class.

If the class was found using the above steps, and the resolve flag is true, this method will then invoke the ClassLoader.resolveClass(Class) method on the resulting Class object.

Subclasses of ClassLoader are encouraged to override ClassLoader.findClass(String), rather than this method.

Returns: The resulting Class object
Parameters:
- name - The binary name of the class
- resolve - If true then resolve the class
Throws:
- ClassNotFoundException - If the class could not be found

  Creates a new instance of URLClassLoader for the specified URLs and default parent class loader.

  Creates a new instance of URLClassLoader for the specified
URLs and default parent class loader. If a security manager is
installed, the loadClass method of the URLClassLoader
returned by this method will invoke the
SecurityManager.checkPackageAccess before
loading the class.
Returns: the resulting class loader
Parameters:
- urls - the URLs to search for classes and resources

  Creates a new instance of URLClassLoader for the specified URLs and parent class loader.

  Creates a new instance of URLClassLoader for the specified
URLs and parent class loader. If a security manager is
installed, the loadClass method of the URLClassLoader
returned by this method will invoke the
SecurityManager.checkPackageAccess method before
loading the class.
Returns: the resulting class loader
Parameters:
- urls - the URLs to search for classes and resources
- parent - the parent class loader for delegation

  Links the specified class.

  Links the specified class. This (misleadingly named) method may be
used by a class loader to link a class. If the class c has
already been linked, then this method simply returns. Otherwise, the
class is linked as described in the "Execution" chapter of the href="http://java.sun.com/docs/books/jls/">Java Language
Specification.

Parameters:
- c - The class to link
Throws:
- NullPointerException - If c is null.
See Also: ClassLoader.defineClass(String, byte[], int, int),

  Sets the desired assertion status for the named top-level class in this class loader and any nested classes contained therein.

  Sets the desired assertion status for the named top-level class in this class loader and any nested classes contained therein. This setting takes precedence over the class loader's default assertion status, and over any applicable per-package default. This method has no effect if the named class has already been initialized. (Once a class is initialized, its assertion status cannot change.)

If the named class is not a top-level class, this invocation will have no effect on the actual assertion status of any class.

Parameters:
- className - The fully qualified class name of the top-level class whose assertion status is to be set.
- enabled - true if the named class is to have assertions enabled when (and if) it is initialized, false if the class is to have assertions disabled.
Since: 1.4

  Sets the default assertion status for this class loader.

  Sets the default assertion status for this class loader. This setting
determines whether classes loaded by this class loader and initialized
in the future will have assertions enabled or disabled by default.
This setting may be overridden on a per-package or per-class basis by
invoking ClassLoader.setPackageAssertionStatus(String, boolean) or ClassLoader.setClassAssertionStatus(String, boolean).

Parameters:
- enabled - true if classes loaded by this class loader will henceforth have assertions enabled by default, false if they will have assertions disabled by default.
Since: 1.4

  Sets the package default assertion status for the named package.

  Sets the package default assertion status for the named package. The package default assertion status determines the assertion status for classes initialized in the future that belong to the named package or any of its "subpackages".

A subpackage of a package named p is any package whose name begins with "p.". For example, javax.swing.text is a subpackage of javax.swing, and both java.util and java.lang.reflect are subpackages of java.

In the event that multiple package defaults apply to a given class, the package default pertaining to the most specific package takes precedence over the others. For example, if javax.lang and javax.lang.reflect both have package defaults associated with them, the latter package default applies to classes in javax.lang.reflect.

Package defaults take precedence over the class loader's default assertion status, and may be overridden on a per-class basis by invoking ClassLoader.setClassAssertionStatus(String, boolean).

Parameters:
- packageName - The name of the package whose package default assertion status is to be set. A null value indicates the unnamed package that is "current" (Java Language Specification, section 7.4.2).
- enabled - true if classes loaded by this classloader and belonging to the named package or any of its subpackages will have assertions enabled by default, false if they will have assertions disabled by default.
Since: 1.4

  Sets the signers of a class.

  Sets the signers of a class. This should be invoked after defining a
class.

Parameters:
- c - The Class object
- signers - The signers for the class
Since: 1.1