/// <summary>
/// Creates a new PolicyDocument using the XmlReader instance provided with the possibility of writing.
/// </summary>
/// <param name="reader">The XmlReader positioned at the begining of the document.</param>
/// <param name="schemaVersion">The version of the schema that will be used to validate.</param>
public PolicyDocumentReadWrite(XmlReader reader, XacmlVersion schemaVersion)
{
// Validate the parameters
if (reader == null)
{
throw new ArgumentNullException("reader");
}
_schemaVersion = schemaVersion;
// Prepare Xsd validation
#if NET10
XmlValidatingReader vreader = new XmlValidatingReader( reader );
#endif
#if NET20
ValidationEventHandler validationHandler = vreader_ValidationEventHandler;
XmlReaderSettings settings = new XmlReaderSettings {ValidationType = ValidationType.Schema};
settings.ValidationEventHandler += validationHandler;
XmlReader vreader = null;
#endif
try
{
switch (schemaVersion)
{
case XacmlVersion.Version10:
case XacmlVersion.Version11:
{
Stream schemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(Xacml10PolicySchemaResourceName);
#if NET10
XmlTextReader schemaReader = new XmlTextReader(schemaStream);
vreader.Schemas.Add( PolicySchema1.Namespaces.Policy, schemaReader );
#endif
#if NET20
if (_compiledSchemas11 == null)
{
_compiledSchemas11 = new XmlSchemaSet();
_compiledSchemas11.Add(XmlSchema.Read(schemaStream, validationHandler));
_compiledSchemas11.Compile();
}
settings.Schemas.Add(_compiledSchemas11);
#endif
break;
}
case XacmlVersion.Version20:
{
Stream schemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(Xacml20PolicySchemaResourceName);
#if NET10
XmlTextReader schemaReader = new XmlTextReader(schemaStream);
vreader.Schemas.Add( PolicySchema2.Namespaces.Policy, schemaReader );
#endif
#if NET20
if (_compiledSchemas20 == null)
{
_compiledSchemas20 = new XmlSchemaSet();
_compiledSchemas20.Add(XmlSchema.Read(schemaStream, validationHandler));
_compiledSchemas20.Compile();
}
settings.Schemas.Add(_compiledSchemas20);
#endif
break;
}
default:
throw new ArgumentException(Resource.ResourceManager[Resource.MessageKey.exc_invalid_version_parameter_value], "version");
}
#if NET10
vreader.ValidationEventHandler += new System.Xml.Schema.ValidationEventHandler( vreader_ValidationEventHandler );
#endif
#if NET20
vreader = XmlReader.Create(reader, settings);
#endif
// Read and validate the document.
while (vreader.Read())
{
//Read all the namespaces and keep them in the _namespaces hashtable.
if (vreader.HasAttributes)
{
while (vreader.MoveToNextAttribute())
{
if (vreader.LocalName == PolicySchema1.Namespaces.XMLNS)
{
_namespaces.Add(vreader.Prefix, vreader.Value);
}
else if (vreader.Prefix == PolicySchema1.Namespaces.XMLNS)
{
_namespaces.Add(vreader.LocalName, vreader.Value);
}
}
vreader.MoveToElement();
}
// Check the first element of the document and proceeds to read the contents
// depending on the first node name.
switch (vreader.LocalName)
{
case PolicySchema1.PolicySetElement.PolicySet:
{
_policySet = new PolicySetElementReadWrite(vreader, schemaVersion);
return;
}
case PolicySchema1.PolicyElement.Policy:
{
_policy = new PolicyElementReadWrite(vreader, schemaVersion);
return;
}
}
}
}
finally
{
if (vreader != null)
{
vreader.Close();
}
}
}
