| java.lang.Object
 java.security.Permission
java.security.BasicPermission
java.util.PropertyPermission
| PropertyPermission | | final public class PropertyPermission extends BasicPermission (Code) | | This class is for property permissions.
The name is the name of the property ("java.home",
"os.name", etc). The naming
convention follows the hierarchical property naming convention.
Also, an asterisk
may appear at the end of the name, following a ".", or by itself, to
signify a wildcard match. For example: "java.*" or "*" is valid,
"*java" or "a*b" is not valid.
The actions to be granted are passed to the constructor in a string containing
a list of zero or more comma-separated keywords. The possible keywords are
"read" and "write". Their meaning is defined as follows:
- read
- read permission. Allows
System.getProperty to
be called.
- write
- write permission. Allows
System.setProperty to
be called.
The actions string is converted to lowercase before processing.
Care should be taken before granting code permission to access
certain system properties. For example, granting permission to
access the "java.home" system property gives potentially malevolent
code sensitive information about the system environment (the Java
installation directory). Also, granting permission to access
the "user.name" and "user.home" system properties gives potentially
malevolent code sensitive information about the user environment
(the user's account name and home directory).
See Also: java.security.BasicPermission
See Also: java.security.Permission
See Also: java.security.Permissions
See Also: java.security.PermissionCollection
See Also: java.lang.SecurityManager
version:
1.24 00/02/02
author:
Roland Schemers
since:
1.2 |
| Constructor Summary | |
| public | PropertyPermission(String name, String actions)
Creates a new PropertyPermission object with the specified name.
The name is the name of the system property, and
actions contains a comma-separated list of the
desired actions granted on the property. |
| Method Summary | |
| public boolean | equals(Object obj)
Checks two PropertyPermission objects for equality. | | static String | getActions(int mask)
Return the canonical string representation of the actions. | | public String | getActions()
Returns the "canonical string representation" of the actions.
That is, this method always returns present actions in the following order:
read, write. | | int | getMask()
Return the current action mask. | | public int | hashCode()
Returns the hash code value for this object. | | public boolean | implies(Permission p)
Checks if this PropertyPermission object "implies" the specified
permission.
More specifically, this method returns true if:
- p is an instanceof PropertyPermission,
- p's actions are a subset of this
object's actions, and
- p's name is implied by this object's
name.
| | public PermissionCollection | newPermissionCollection()
Returns a new PermissionCollection object for storing
PropertyPermission objects. |
| PropertyPermission | | public PropertyPermission(String name, String actions)(Code) | | Creates a new PropertyPermission object with the specified name.
The name is the name of the system property, and
actions contains a comma-separated list of the
desired actions granted on the property. Possible actions are
"read" and "write".
Parameters:
name - the name of the PropertyPermission.
Parameters:
actions - the actions string. |
| equals | | public boolean equals(Object obj)(Code) | | Checks two PropertyPermission objects for equality. Checks that obj is
a PropertyPermission, and has the same name and actions as this object.
Parameters:
obj - the object we are testing for equality with this object. true if obj is a PropertyPermission, and has the same name andactions as this PropertyPermission object. |
| getActions | | static String getActions(int mask)(Code) | | Return the canonical string representation of the actions.
Always returns present actions in the following order:
read, write.
the canonical string representation of the actions. |
| getActions | | public String getActions()(Code) | | Returns the "canonical string representation" of the actions.
That is, this method always returns present actions in the following order:
read, write. For example, if this PropertyPermission object
allows both write and read actions, a call to getActions
will return the string "read,write".
the canonical string representation of the actions. |
| getMask | | int getMask()(Code) | | Return the current action mask.
Used by the PropertyPermissionCollection
the actions mask. |
| hashCode | | public int hashCode()(Code) | | Returns the hash code value for this object.
The hash code used is the hash code of this permissions name, that is,
getName().hashCode(), where getName is
from the Permission superclass.
a hash code value for this object. |
| implies | | public boolean implies(Permission p)(Code) | | Checks if this PropertyPermission object "implies" the specified
permission.
More specifically, this method returns true if:
- p is an instanceof PropertyPermission,
- p's actions are a subset of this
object's actions, and
- p's name is implied by this object's
name. For example, "java.*" implies "java.home".
Parameters:
p - the permission to check against. true if the specified permission is implied by this object,false if not. |
| newPermissionCollection | | public PermissionCollection newPermissionCollection()(Code) | | Returns a new PermissionCollection object for storing
PropertyPermission objects.
a new PermissionCollection object suitable for storingPropertyPermissions. |
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