Module openj9.sharedclasses

Package com.ibm.oti.shared

Class SharedClassPermission

java.lang.Object

java.security.Permission

java.security.BasicPermission

com.ibm.oti.shared.SharedClassPermission

All Implemented Interfaces:

Serializable, Guard

public class SharedClassPermission
extends BasicPermission

SharedClassPermission provides security permission to govern ClassLoader access to the shared class cache.

Usage: To grant permission to a ClassLoader, add permission in the java.policy file. For example,

  com.ibm.oti.shared.SharedClassPermission "classloaders.myClassLoader", "read,write";

Possible actions are:

• "read" allows a ClassLoader to load classes from the shared cache
• "write" allows a ClassLoader to add classes to the shared cache

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SharedClassPermission(ClassLoader loader, String actions)	Constructs a new instance of this class.
SharedClassPermission(String classLoaderClassName, String actions)	Constructs a new instance of this class.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)	Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
String	getActions()	Answers the actions associated with the receiver.
int	hashCode()	Answers the integer hash code for the receiver.
boolean	implies(Permission permission)	Indicates whether the argument permission is implied by the receiver.
PermissionCollection	newPermissionCollection()	Answers a new PermissionCollection for holding permissions of this class.

Methods declared in class java.security.Permission

checkGuard, getName, toString

Methods declared in class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

SharedClassPermission

public SharedClassPermission(ClassLoader loader,
 String actions)

Constructs a new instance of this class.

Parameters:

loader - ClassLoader the ClassLoader requiring the permission

actions - String the actions which are applicable to it

SharedClassPermission

public SharedClassPermission(String classLoaderClassName,
 String actions)

Constructs a new instance of this class.

Parameters:

classLoaderClassName - String the name of the ClassLoader class requiring the permission

actions - String the actions which are applicable to it

Method Details

equals

public boolean equals(Object o)

Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.

In this case, the receiver must be for the same property as the argument, and must have the same actions.

Overrides:

equals in class BasicPermission

Parameters:

o - the object to compare with this object

Returns:

boolean true if the object is the same as this object, false if it is different from this object

See Also:

• hashCode()

newPermissionCollection

public PermissionCollection newPermissionCollection()

Answers a new PermissionCollection for holding permissions of this class.

Overrides:

newPermissionCollection in class BasicPermission

Returns:

a new PermissionCollection

See Also:

• PermissionCollection

hashCode

public int hashCode()

Answers the integer hash code for the receiver.

Any two objects which answer true when passed to equals must answer the same value for this method.

Overrides:

hashCode in class BasicPermission

Returns:

the receiver's hash code

See Also:

• equals(java.lang.Object)

getActions

public String getActions()

Answers the actions associated with the receiver.

The result will be either "read", "write", or "read,write".

Overrides:

getActions in class BasicPermission

Returns:

String the actions associated with the receiver

implies

public boolean implies(Permission permission)

Indicates whether the argument permission is implied by the receiver.

Overrides:

implies in class BasicPermission

Parameters:

permission - Permission the permission to check

Returns:

boolean true if the argument permission is implied by the receiver, and false if it is not