java.security.SecureClassLoader

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.

version

1.86, 11/17/05

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.

parent 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

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

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.

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

return the Class object created from the data, and optional CodeSource.

Throws ClassFormatError: if the data did not contain a valid class

Throws IndexOutOfBoundsException: if either off or len is negative, or if off+len is greater than b.length.

Throws 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 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.

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

return the Class object created from the data, and optional CodeSource.

Throws ClassFormatError: if the data did not contain a valid class

Throws 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

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.

codesource the codesource.

return the permissions granted to the codesource.