private OleDbPermission UnionOleDb(OleDbPermission target, OleDbPermission newPermission)
{
if (null == target)
{
newPermission._providerRestriction = _providerRestriction;
}
else
{
string[] theseRestrictions = _providerRestriction; // MDAC 83107
string[] thoseRestrictions = target._providerRestriction;
if (null == theseRestrictions)
{
newPermission._providerRestriction = thoseRestrictions;
}
else if (null == thoseRestrictions)
{
newPermission._providerRestriction = theseRestrictions;
}
else // union of two string[]
{
int a = theseRestrictions.Length;
int b = thoseRestrictions.Length;
string[] restrictions = new string[a + b];
theseRestrictions.CopyTo(restrictions, 0);
thoseRestrictions.CopyTo(restrictions, a);
newPermission._providerRestriction = DBConnectionString.RemoveDuplicates(restrictions);
}
}
return(newPermission);
}
// <IPermission class="OleDbPermission" version="1" AllowBlankPassword=false>
// <keyword name="provider">
// <value value="sqloledb"/>
// <value value="sqloledb.1"/>
// </keyword>
// </IPermission>
/// <include file='doc\OleDbPermission.uex' path='docs/doc[@for="OleDbPermission.FromXml"]/*' />
override public void FromXml(SecurityElement securityElement)
{
base.FromXml(securityElement);
ArrayList children = securityElement.Children;
if (IsUnrestricted() || (null == children))
{
return;
}
int count;
Hashtable hash = new Hashtable();
foreach (SecurityElement keyElement in children)
{
string keyword = keyElement.Attribute(ODB._Name);
if (null != keyword)
{
keyword = keyword.ToLower(CultureInfo.InvariantCulture);
}
if (keyElement.Tag.Equals(ODB._Keyword) && (null != keyword) && (ODB.Provider == keyword))
{
ArrayList keyvaluepair = keyElement.Children;
if (null != keyvaluepair)
{
count = keyvaluepair.Count;
for (int i = 0; i < count; ++i)
{
SecurityElement valueElement = (SecurityElement)keyvaluepair[i];
string value = (string)valueElement.Attribute(ODB._Value);
if (valueElement.Tag.Equals(ODB._Value) && (null != value))
{
value = value.Trim();
if (0 < value.Length)
{
hash[value] = null;
}
}
}
}
}
}
count = hash.Count;
if (0 < count)
{
string[] oldrestrictions = _providerRestriction; // appending to
if (null != oldrestrictions)
{
count += oldrestrictions.Length;
}
string[] restrictions = new string[count];
hash.Keys.CopyTo(restrictions, 0);
if (null != oldrestrictions)
{
oldrestrictions.CopyTo(restrictions, count - oldrestrictions.Length);
}
_providerRestriction = DBConnectionString.RemoveDuplicates(restrictions);
_providers = null;
}
}