void ResolveEntity()
{
if (entity != null)
{
entity.ResolveEntity();
}
else
{
if (source.NodeType != XmlNodeType.EntityReference)
{
throw new InvalidOperationException("The current node is not an Entity Reference");
}
XmlTextReaderImpl entReader = null;
#if NOT_PFX
if (ParserContext.Dtd != null)
{
entReader = ParserContext.Dtd.GenerateEntityContentReader(source.Name, ParserContext);
}
#endif
if (entReader == null)
{
throw new XmlException(this as IXmlLineInfo, this.BaseURI, String.Format("Reference to undeclared entity '{0}'.", source.Name));
}
if (entityNameStack == null)
{
entityNameStack = new Stack <string> ();
}
else if (entityNameStack.Contains(Name))
{
throw new XmlException(String.Format("General entity '{0}' has an invalid recursive reference to itself.", Name));
}
entityNameStack.Push(Name);
entity = new XmlTextReader(
entReader, insideAttribute);
entity.entityNameStack = entityNameStack;
entity.CopyProperties(this);
}
}
public void ResolveEntity2 ()
{
string ent1 = "<!ENTITY ent 'entity string'>";
string ent2 = "<!ENTITY ent2 '<foo/><foo/>'>]>";
string dtd = "<!DOCTYPE root[<!ELEMENT root (#PCDATA|foo)*>" + ent1 + ent2;
string xml = dtd + "<root>&ent3;&ent2;</root>";
XmlTextReader dvr = new XmlTextReader (xml, XmlNodeType.Document, null);
dvr.EntityHandling = EntityHandling.ExpandCharEntities;
dvr.Read (); // DTD
dvr.Read (); // root
dvr.Read (); // &ent3;
AssertEquals (XmlNodeType.EntityReference, dvr.NodeType);
// ent3 does not exists in this dtd.
AssertEquals (XmlNodeType.EntityReference, dvr.NodeType);
try {
dvr.ResolveEntity ();
Fail ("Attempt to resolve undeclared entity should fail.");
} catch (XmlException) {
}
}
public void ResolveEntity ()
{
string ent1 = "<!ENTITY ent 'entity string'>";
string ent2 = "<!ENTITY ent2 '<foo/><foo/>'>]>";
string dtd = "<!DOCTYPE root[<!ELEMENT root (#PCDATA|foo)*>" + ent1 + ent2;
string xml = dtd + "<root>&ent;&ent2;</root>";
XmlTextReader dvr = new XmlTextReader (xml, XmlNodeType.Document, null);
dvr.EntityHandling = EntityHandling.ExpandCharEntities;
dvr.Read (); // DTD
dvr.Read (); // root
dvr.Read (); // &ent;
AssertEquals (XmlNodeType.EntityReference, dvr.NodeType);
AssertEquals (1, dvr.Depth);
dvr.ResolveEntity ();
// It is still entity reference.
AssertEquals (XmlNodeType.EntityReference, dvr.NodeType);
dvr.Read ();
AssertEquals (XmlNodeType.Text, dvr.NodeType);
AssertEquals (2, dvr.Depth);
AssertEquals ("entity string", dvr.Value);
dvr.Read ();
AssertEquals (XmlNodeType.EndEntity, dvr.NodeType);
AssertEquals (1, dvr.Depth);
AssertEquals ("", dvr.Value);
dvr.Read (); // &ent2;
AssertEquals (XmlNodeType.EntityReference, dvr.NodeType);
AssertEquals (1, dvr.Depth);
dvr.ResolveEntity ();
// It is still entity reference.
AssertEquals (XmlNodeType.EntityReference, dvr.NodeType);
// It now became element node.
dvr.Read ();
AssertEquals (XmlNodeType.Element, dvr.NodeType);
AssertEquals (2, dvr.Depth);
}
// Resolve an entity reference.
public override void ResolveEntity()
{
reader.ResolveEntity();
}
