/// <summary>
/// Creates a new ContextDocumentReadWrite using the XmlReader instance provided.
/// </summary>
/// <param name="reader">The XmlReader instance positioned at the begining of the document.</param>
/// <param name="schemaVersion">The schema used to validate this context document.</param>
public ContextDocumentReadWrite(XmlReader reader, XacmlVersion schemaVersion)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
// Search for the first element.
while (reader.Read() && reader.NodeType != XmlNodeType.Element)
{
}
// Keep the contents of the context document.
// HACK: Due to XPath validation the document must be readed twice, the first time to load the instance
// and the second one to keep a document to execute XPath sentences.
_xmlString = reader.ReadOuterXml();
// Read the contents in a new reader.
var sreader = new StringReader(_xmlString);
// Prepare the validation.
var validationHandler = new ValidationEventHandler(vreader_ValidationEventHandler);
var settings = new XmlReaderSettings {
ValidationType = ValidationType.Schema
};
settings.ValidationEventHandler += validationHandler;
XmlReader vreader = null;
try
{
switch (schemaVersion)
{
case XacmlVersion.Version10:
case XacmlVersion.Version11:
{
if (_compiledSchemas11 == null)
{
var policySchemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(PolicyDocumentReadWrite.Xacml10PolicySchemaResourceName);
Debug.Assert(policySchemaStream != null);
var contextSchemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(Xacml10ContextSchemaResourceName);
Debug.Assert(contextSchemaStream != null);
_compiledSchemas11 = new XmlSchemaSet();
_compiledSchemas11.Add(XmlSchema.Read(policySchemaStream, validationHandler));
_compiledSchemas11.Add(XmlSchema.Read(contextSchemaStream, validationHandler));
_compiledSchemas11.Compile();
}
settings.Schemas.Add(_compiledSchemas11);
break;
}
case XacmlVersion.Version20:
{
if (_compiledSchemas20 == null)
{
Stream policySchemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(PolicyDocumentReadWrite.Xacml20PolicySchemaResourceName);
Debug.Assert(policySchemaStream != null);
Stream contextSchemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(Xacml20ContextSchemaResourceName);
Debug.Assert(contextSchemaStream != null);
_compiledSchemas20 = new XmlSchemaSet();
_compiledSchemas20.Add(XmlSchema.Read(policySchemaStream, validationHandler));
_compiledSchemas20.Add(XmlSchema.Read(contextSchemaStream, validationHandler));
_compiledSchemas20.Compile();
}
settings.Schemas.Add(_compiledSchemas20);
break;
}
default:
throw new ArgumentException("ÒâÍâµÄ°æ±¾ºÅ" + schemaVersion);
}
vreader = XmlReader.Create(sreader, settings);
while (vreader.Read())
{
//Read all the namespaces and keep them in the _namespaces hashtable.
if (vreader.HasAttributes)
{
while (vreader.MoveToNextAttribute())
{
if (vreader.LocalName == Consts.Schema1.Namespaces.Xmlns)
{
_namespaces.Add(vreader.Prefix, vreader.Value);
}
else if (vreader.Prefix == Consts.Schema1.Namespaces.Xmlns)
{
_namespaces.Add(vreader.LocalName, vreader.Value);
}
}
vreader.MoveToElement();
}
switch (vreader.LocalName)
{
case Consts.ContextSchema.RequestElement.Request:
_request = new RequestElementReadWrite(vreader, schemaVersion);
break;
case Consts.ContextSchema.ResponseElement.Response:
Response = new ResponseElement(vreader, schemaVersion);
break;
}
}
}
finally
{
if (vreader != null)
{
vreader.Close();
}
}
}
/// <summary>
/// Creates a new ContextDocumentReadWrite using the XmlReader instance provided.
/// </summary>
/// <param name="reader">The XmlReader instance positioned at the begining of the document.</param>
/// <param name="schemaVersion">The schema used to validate this context document.</param>
public ContextDocumentReadWrite(XmlReader reader, XacmlVersion schemaVersion)
{
if (reader == null) throw new ArgumentNullException("reader");
// Search for the first element.
while (reader.Read() && reader.NodeType != XmlNodeType.Element)
{ }
// Keep the contents of the context document.
// HACK: Due to XPath validation the document must be readed twice, the first time to load the instance
// and the second one to keep a document to execute XPath sentences.
_xmlString = reader.ReadOuterXml();
// Read the contents in a new reader.
var sreader = new StringReader(_xmlString);
// Prepare the validation.
var validationHandler = new ValidationEventHandler(vreader_ValidationEventHandler);
var settings = new XmlReaderSettings { ValidationType = ValidationType.Schema };
settings.ValidationEventHandler += validationHandler;
XmlReader vreader = null;
try
{
switch (schemaVersion)
{
case XacmlVersion.Version10:
case XacmlVersion.Version11:
{
if (_compiledSchemas11 == null)
{
var policySchemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(PolicyDocumentReadWrite.Xacml10PolicySchemaResourceName);
Debug.Assert(policySchemaStream != null);
var contextSchemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(Xacml10ContextSchemaResourceName);
Debug.Assert(contextSchemaStream != null);
_compiledSchemas11 = new XmlSchemaSet();
_compiledSchemas11.Add(XmlSchema.Read(policySchemaStream, validationHandler));
_compiledSchemas11.Add(XmlSchema.Read(contextSchemaStream, validationHandler));
_compiledSchemas11.Compile();
}
settings.Schemas.Add(_compiledSchemas11);
break;
}
case XacmlVersion.Version20:
{
if (_compiledSchemas20 == null)
{
Stream policySchemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(PolicyDocumentReadWrite.Xacml20PolicySchemaResourceName);
Debug.Assert(policySchemaStream != null);
Stream contextSchemaStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(Xacml20ContextSchemaResourceName);
Debug.Assert(contextSchemaStream != null);
_compiledSchemas20 = new XmlSchemaSet();
_compiledSchemas20.Add(XmlSchema.Read(policySchemaStream, validationHandler));
_compiledSchemas20.Add(XmlSchema.Read(contextSchemaStream, validationHandler));
_compiledSchemas20.Compile();
}
settings.Schemas.Add(_compiledSchemas20);
break;
}
default:
throw new ArgumentException("ÒâÍâµÄ°æ±¾ºÅ" + schemaVersion);
}
vreader = XmlReader.Create(sreader, settings);
while (vreader.Read())
{
//Read all the namespaces and keep them in the _namespaces hashtable.
if (vreader.HasAttributes)
{
while (vreader.MoveToNextAttribute())
{
if (vreader.LocalName == Consts.Schema1.Namespaces.Xmlns)
{
_namespaces.Add(vreader.Prefix, vreader.Value);
}
else if (vreader.Prefix == Consts.Schema1.Namespaces.Xmlns)
{
_namespaces.Add(vreader.LocalName, vreader.Value);
}
}
vreader.MoveToElement();
}
switch (vreader.LocalName)
{
case Consts.ContextSchema.RequestElement.Request:
_request = new RequestElementReadWrite(vreader, schemaVersion);
break;
case Consts.ContextSchema.ResponseElement.Response:
Response = new ResponseElement(vreader, schemaVersion);
break;
}
}
}
finally
{
if (vreader != null)
{
vreader.Close();
}
}
}
