CreatePermission (SecurityElement el, PermissionState permState, bool ignoreTypeLoadFailures)
{
if (el == null || !(el.Tag.Equals("Permission") || el.Tag.Equals("IPermission")) )
throw new ArgumentException( String.Format( null, Environment.GetResourceString( "Argument_WrongElementType" ), "<Permission>" ) ) ;
String className;
int classNameLength;
int classNameStart;
if (!ParseElementForObjectCreation( el,
BuiltInPermission,
out className,
out classNameStart,
out classNameLength ))
{
goto USEREFLECTION;
}
// We have a built in permission, figure out which it is.
// UIPermission
// FileIOPermission
// SecurityPermission
// PrincipalPermission
// ReflectionPermission
// FileDialogPermission
// EnvironmentPermission
// GacIdentityPermission
// UrlIdentityPermission
// SiteIdentityPermission
// ZoneIdentityPermission
// KeyContainerPermission
// UnsafeForHostPermission
// HostProtectionPermission
// StrongNameIdentityPermission
// IsolatedStorageFilePermission
switch (classNameLength)
{
case 12:
// UIPermission
if (String.Compare(className, classNameStart, "UIPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new UIPermission( permState );
else
goto USEREFLECTION;
case 16:
// FileIOPermission
if (String.Compare(className, classNameStart, "FileIOPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new FileIOPermission( permState );
else
goto USEREFLECTION;
case 18:
if (String.Compare(className, classNameStart, "SecurityPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new SecurityPermission( permState );
else
goto USEREFLECTION;
case 19:
// PrincipalPermission
if (String.Compare(className, classNameStart, "PrincipalPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new PrincipalPermission( permState );
else
goto USEREFLECTION;
case 20:
// ReflectionPermission
// FileDialogPermission
if (className[classNameStart] == 'R')
{
if (String.Compare(className, classNameStart, "ReflectionPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new ReflectionPermission( permState );
else
goto USEREFLECTION;
}
else
{
if (String.Compare(className, classNameStart, "FileDialogPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new FileDialogPermission( permState );
else
goto USEREFLECTION;
}
case 21:
// EnvironmentPermission
// UrlIdentityPermission
// GacIdentityPermission
if (className[classNameStart] == 'E')
{
if (String.Compare(className, classNameStart, "EnvironmentPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new EnvironmentPermission( permState );
else
goto USEREFLECTION;
}
else if (className[classNameStart] == 'U')
{
if (String.Compare(className, classNameStart, "UrlIdentityPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new UrlIdentityPermission( permState );
else
goto USEREFLECTION;
}
else
{
if (String.Compare(className, classNameStart, "GacIdentityPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new GacIdentityPermission( permState );
else
goto USEREFLECTION;
}
case 22:
// SiteIdentityPermission
// ZoneIdentityPermission
// KeyContainerPermission
if (className[classNameStart] == 'S')
{
if (String.Compare(className, classNameStart, "SiteIdentityPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new SiteIdentityPermission( permState );
else
goto USEREFLECTION;
}
else if (className[classNameStart] == 'Z')
{
if (String.Compare(className, classNameStart, "ZoneIdentityPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new ZoneIdentityPermission( permState );
else
goto USEREFLECTION;
}
else
{
goto USEREFLECTION;
}
case 24:
// HostProtectionPermission
if (String.Compare(className, classNameStart, "HostProtectionPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new HostProtectionPermission( permState );
else
goto USEREFLECTION;
case 28:
// StrongNameIdentityPermission
if (String.Compare(className, classNameStart, "StrongNameIdentityPermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new StrongNameIdentityPermission( permState );
else
goto USEREFLECTION;
case 29:
// IsolatedStorageFilePermission
if (String.Compare(className, classNameStart, "IsolatedStorageFilePermission", 0, classNameLength, StringComparison.Ordinal) == 0)
return new IsolatedStorageFilePermission( permState );
else
goto USEREFLECTION;
default:
goto USEREFLECTION;
}
USEREFLECTION:
Object[] objs = new Object[1];
objs[0] = permState;
Type permClass = null;
IPermission perm = null;
new ReflectionPermission(ReflectionPermissionFlag.MemberAccess).Assert();
permClass = GetClassFromElement(el, ignoreTypeLoadFailures);
if (permClass == null)
return null;
if (!(typeof(IPermission).IsAssignableFrom(permClass)))
throw new ArgumentException( Environment.GetResourceString("Argument_NotAPermissionType") );
perm = (IPermission) Activator.CreateInstance(permClass, BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public, null, objs, null );
return perm;
}
