/// <summary>Creates a permission that is the union of the current permission and the specified permission.</summary>
/// <returns>A new permission that represents the union of the current permission and the specified permission.</returns>
/// <param name="target">A permission to combine with the current permission. It must be of the same type as the current permission. </param>
/// <exception cref="T:System.ArgumentException">The <paramref name="target" /> parameter is not null and is not of the same type as the current permission. -or-The <see cref="P:System.Security.Permissions.UrlIdentityPermission.Url" /> property is not a valid URL.-or-The two permissions are not equal and one is not a subset of the other.</exception>
public override IPermission Union(IPermission target)
{
UrlIdentityPermission urlIdentityPermission = this.Cast(target);
if (urlIdentityPermission == null)
{
return(this.Copy());
}
if (this.IsEmpty() && urlIdentityPermission.IsEmpty())
{
return(null);
}
if (urlIdentityPermission.IsEmpty())
{
return(this.Copy());
}
if (this.IsEmpty())
{
return(urlIdentityPermission.Copy());
}
if (!this.Match(urlIdentityPermission.url))
{
throw new ArgumentException(Locale.GetText("Cannot union two different urls."), "target");
}
if (this.url.Length < urlIdentityPermission.url.Length)
{
return(this.Copy());
}
return(urlIdentityPermission.Copy());
}
public override IPermission Union(IPermission target)
{
UrlIdentityPermission uip = Cast(target);
if (uip == null)
{
return(Copy());
}
if (IsEmpty() && uip.IsEmpty())
{
return(null);
}
if (uip.IsEmpty())
{
return(Copy());
}
if (IsEmpty())
{
return(uip.Copy());
}
if (Match(uip.url))
{
// shortest form is the union
if (url.Length < uip.url.Length)
{
return(Copy());
}
else
{
return(uip.Copy());
}
}
throw new ArgumentException(Locale.GetText(
"Cannot union two different urls."), "target");
}