What is class loader in java security

What is class loader in java security

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.

Constructor Summary

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

Method Summary

Methods declared in class java.lang.ClassLoader

Methods declared in class java.lang.Object

Constructor Detail

SecureClassLoader

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.

SecureClassLoader

protected 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.

SecureClassLoader

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

Method Detail

defineClass

protected 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. 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.

defineClass

protected final 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.

getPermissions

protected 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.

Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2023, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.

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Class 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.

Constructor Summary

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

Method Summary

Methods declared in class java.lang.ClassLoader

Methods declared in class java.lang.Object

Constructor Details

SecureClassLoader

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.

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.

SecureClassLoader

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

Method Details

defineClass

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.

defineClass

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.

getPermissions

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.

Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples. Other versions.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2023, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.

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What is class loader in java security

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.

Constructor Summary

Method Summary

Methods inherited from class java.lang.ClassLoader

Methods inherited from class java.lang.Object

Constructor Detail

SecureClassLoader

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.

SecureClassLoader

protected 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.

Method Detail

defineClass

protected 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. 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.

defineClass

protected final 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.

getPermissions

protected 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.

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2023, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.

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Class 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.

Constructor Summary

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

Method Summary

Methods declared in class java.lang.ClassLoader

Methods declared in class java.lang.Object

Constructor Details

SecureClassLoader

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.

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.

SecureClassLoader

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

Method Details

defineClass

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.

defineClass

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.

getPermissions

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.

Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples. Other versions.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2023, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.

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