Simple permission system based on logic operation (realization) JS version _javascript skill

Author: slightboy, Time: 2006-10-17
This is a JS implementation version, previously made to explain the principle is not here to do more explanation
For a description of the principle, please view the VBS version.
var permissiontype =
{
Read:1,
Write:2,
Delete:4
}
function Permissionsetcomponent (value)
{
This. Value = value;
This.getread = function ()
{
Return This.getvalue (Permissiontype.read);
}
This.setread = function (value)
{
This.setvalue (permissiontype.read, value);
}
This. Read = function ()
{
if (Arguments.length > 0)
This.setvalue (Permissiontype.read, arguments[0]);
Else
Return This.getvalue (Permissiontype.read);
}
This. Write = function ()
{
if (Arguments.length > 0)
This.setvalue (Permissiontype.write, arguments[0]);
Else
Return This.getvalue (Permissiontype.write);
}
This. Delete = function ()
{
if (Arguments.length > 0)
This.setvalue (Permissiontype.delete, arguments[0]);
Else
Return This.getvalue (Permissiontype.delete);
}
This.getvalue = function (PermissionType)
{
Return (this. Value & permissiontype) = = PermissionType;
}
This.setvalue = function (PermissionType, value)
{
if (value)
This. Value |= PermissionType;
Else
This. Value &= ~permissiontype;
}
}
var PermissionSet = new Permissionsetcomponent (0);
W ("Read:");
Permissionset.read (FALSE);
W (permissionset.value + "" + Permissionset.read ());
Permissionset.read (TRUE);
W (permissionset.value + "" + Permissionset.read ());
W ("Write:");
Permissionset.write (FALSE);
W (permissionset.value + "" + permissionset.write ());
Permissionset.write (TRUE);
W (permissionset.value + "" + permissionset.write ());
W ("Delete:");
Permissionset.delete (FALSE);
W (permissionset.value + "" + Permissionset.delete ());
Permissionset.delete (TRUE);
W (permissionset.value + "" + Permissionset.delete ());
function W (o)
{
Response.Write (o + "<br/>");
}
Note: The red section for Java style writing is not necessary for this example.
Just do a show, if you prefer Java style, you can choose this type of writing.