java.io

Class FilePermission

java.lang.Object

java.security.Permission

java.io.FilePermission

All Implemented Interfaces:

Serializable, java.security.Guard

public final class FilePermission
extends java.security.Permission
implements Serializable

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FilePermission(java.lang.String pathExpression, java.lang.String actionsString) Create a new FilePermission.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o) Check two FilePermissions for semantic equality.
java.lang.String	getActions() Get the actions this FilePermission supports.
int	hashCode() Get the hash code for this Object.
boolean	implies(java.security.Permission p) Check to see if this permission implies another.

Methods inherited from class java.security.Permission

checkGuard, getName, newPermissionCollection, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

FilePermission

public FilePermission(java.lang.String pathExpression,
              java.lang.String actionsString)

Create a new FilePermission.

Parameters:

pathExpression - an expression specifying the paths this permission represents.

actionsString - a comma-separated list of the actions this permission represents. The actions must be "read", "write", "execute" and/or "delete".

Method Detail

getActions

public java.lang.String getActions()

Get the actions this FilePermission supports.

Specified by:

getActions in class java.security.Permission

Returns:

the String representing the actions this FilePermission supports.

hashCode

public int hashCode()

Get the hash code for this Object.

FilePermission's hash code is calculated as the exclusive or of the target String's hash code and the action String's hash code.

Specified by:

hashCode in class java.security.Permission

Returns:

the hash code for this Object.

See Also:

Object.equals(Object), System.identityHashCode(Object)

equals

public boolean equals(java.lang.Object o)

Check two FilePermissions for semantic equality. Two FilePermissions are exactly equivalent if they have identical path expressions and have exactly the same access permissions.

Specified by:

equals in class java.security.Permission

Parameters:

o - the Object to compare to.

Returns:

whether the Objects are semantically equivalent.

See Also:

Object.hashCode()

implies

public boolean implies(java.security.Permission p)

Check to see if this permission implies another. Permission A implies permission B if these things are all true:

1. A and B are both FilePermissions.
2. All possible files in B are included in A (possibly more are in A).
3. All actions B supports, A also supports.

Specified by:

implies in class java.security.Permission

Parameters:

p - the Permission to compare against.

Returns:

whether this Permission implies p