private static void VerifyErrorElementNotFound(ref DuplicateErrorElementPropertyBitMask elementsFoundBitField, DuplicateErrorElementPropertyBitMask elementFoundBitMask, string elementName)
{
if ((elementsFoundBitField & elementFoundBitMask) == elementFoundBitMask)
{
throw new ODataException(Strings.ODataAtomErrorDeserializer_MultipleErrorElementsWithSameName(elementName));
}
elementsFoundBitField |= elementFoundBitMask;
}
internal static ODataError ReadErrorElement(BufferingXmlReader xmlReader, int maxInnerErrorDepth)
{
ODataError error = new ODataError();
DuplicateErrorElementPropertyBitMask none = DuplicateErrorElementPropertyBitMask.None;
if (xmlReader.IsEmptyElement)
{
return(error);
}
xmlReader.Read();
Label_001A:
switch (xmlReader.NodeType)
{
case XmlNodeType.Element:
string str;
if (xmlReader.NamespaceEquals(xmlReader.ODataMetadataNamespace) && ((str = xmlReader.LocalName) != null))
{
if (!(str == "code"))
{
if (str == "message")
{
VerifyErrorElementNotFound(ref none, DuplicateErrorElementPropertyBitMask.Message, "message");
error.MessageLanguage = xmlReader.GetAttribute(xmlReader.XmlLangAttributeName, xmlReader.XmlNamespace);
error.Message = xmlReader.ReadElementValue();
goto Label_00EA;
}
if (str == "innererror")
{
VerifyErrorElementNotFound(ref none, DuplicateErrorElementPropertyBitMask.InnerError, "innererror");
error.InnerError = ReadInnerErrorElement(xmlReader, 0, maxInnerErrorDepth);
goto Label_00EA;
}
}
else
{
VerifyErrorElementNotFound(ref none, DuplicateErrorElementPropertyBitMask.Code, "code");
error.ErrorCode = xmlReader.ReadElementValue();
goto Label_00EA;
}
}
break;
case XmlNodeType.EndElement:
goto Label_00EA;
}
xmlReader.Skip();
Label_00EA:
if (xmlReader.NodeType != XmlNodeType.EndElement)
{
goto Label_001A;
}
return(error);
}
/// <summary>
/// Verifies that the specified element was not yet found in a top-level error element.
/// </summary>
/// <param name="elementsFoundBitField">
/// The bit field which stores which elements of an error were found so far.
/// </param>
/// <param name="elementFoundBitMask">The bit mask for the element to check.</param>
/// <param name="elementName">The name of the element to check (used for error reporting).</param>
private static void VerifyErrorElementNotFound(
ref DuplicateErrorElementPropertyBitMask elementsFoundBitField,
DuplicateErrorElementPropertyBitMask elementFoundBitMask,
string elementName)
{
Debug.Assert(((int)elementFoundBitMask & (((int)elementFoundBitMask) - 1)) == 0, "elementFoundBitMask is not a power of 2.");
Debug.Assert(!string.IsNullOrEmpty(elementName), "!string.IsNullOrEmpty(elementName)");
if ((elementsFoundBitField & elementFoundBitMask) == elementFoundBitMask)
{
throw new ODataException(Strings.ODataAtomErrorDeserializer_MultipleErrorElementsWithSameName(elementName));
}
elementsFoundBitField |= elementFoundBitMask;
}
/// <summary>
/// Reads the content of an error element.
/// </summary>
/// <param name="xmlReader">The Xml reader to read the error payload from.</param>
/// <param name="maxInnerErrorDepth">The maximumum number of recursive internalexception elements to allow.</param>
/// <returns>The <see cref="ODataError"/> representing the error.</returns>
/// <remarks>
/// This method is used to read top-level errors as well as in-stream errors (from inside the buffering Xml reader).
/// Pre-Condition: XmlNodeType.Element - The m:error start element.
/// Post-Condition: XmlNodeType.EndElement - The m:error end-element.
/// XmlNodeType.Element - The empty m:error start element.
/// </remarks>
internal static ODataError ReadErrorElement(BufferingXmlReader xmlReader, int maxInnerErrorDepth)
{
Debug.Assert(xmlReader != null, "this.XmlReader != null");
Debug.Assert(xmlReader.NodeType == XmlNodeType.Element, "xmlReader.NodeType == XmlNodeType.Element");
Debug.Assert(xmlReader.LocalName == AtomConstants.ODataErrorElementName, "Expected reader to be positioned on <m:error> element.");
Debug.Assert(xmlReader.NamespaceEquals(xmlReader.ODataMetadataNamespace), "this.XmlReader.NamespaceEquals(atomizedMetadataNamespace)");
ODataError error = new ODataError();
DuplicateErrorElementPropertyBitMask elementsReadBitmask = DuplicateErrorElementPropertyBitMask.None;
if (!xmlReader.IsEmptyElement)
{
// Move to the first child node of the element.
xmlReader.Read();
do
{
switch (xmlReader.NodeType)
{
case XmlNodeType.EndElement:
// end of the <m:error> element
continue;
case XmlNodeType.Element:
if (xmlReader.NamespaceEquals(xmlReader.ODataMetadataNamespace))
{
switch (xmlReader.LocalName)
{
// <m:code>
case AtomConstants.ODataErrorCodeElementName:
VerifyErrorElementNotFound(
ref elementsReadBitmask,
DuplicateErrorElementPropertyBitMask.Code,
AtomConstants.ODataErrorCodeElementName);
error.ErrorCode = xmlReader.ReadElementValue();
continue;
// <m:message >
case AtomConstants.ODataErrorMessageElementName:
VerifyErrorElementNotFound(
ref elementsReadBitmask,
DuplicateErrorElementPropertyBitMask.Message,
AtomConstants.ODataErrorMessageElementName);
error.Message = xmlReader.ReadElementValue();
continue;
// <m:innererror>
case AtomConstants.ODataInnerErrorElementName:
VerifyErrorElementNotFound(
ref elementsReadBitmask,
DuplicateErrorElementPropertyBitMask.InnerError,
AtomConstants.ODataInnerErrorElementName);
error.InnerError = ReadInnerErrorElement(xmlReader, 0 /* recursionDepth */, maxInnerErrorDepth);
continue;
default:
break;
}
}
break;
default:
break;
}
xmlReader.Skip();
}while (xmlReader.NodeType != XmlNodeType.EndElement);
}
return(error);
}
/// <summary>
/// Verifies that the specified element was not yet found in a top-level error element.
/// </summary>
/// <param name="elementsFoundBitField">
/// The bit field which stores which elements of an error were found so far.
/// </param>
/// <param name="elementFoundBitMask">The bit mask for the element to check.</param>
/// <param name="elementName">The name of the element to check (used for error reporting).</param>
private static void VerifyErrorElementNotFound(
ref DuplicateErrorElementPropertyBitMask elementsFoundBitField,
DuplicateErrorElementPropertyBitMask elementFoundBitMask,
string elementName)
{
Debug.Assert(((int)elementFoundBitMask & (((int)elementFoundBitMask) - 1)) == 0, "elementFoundBitMask is not a power of 2.");
Debug.Assert(!string.IsNullOrEmpty(elementName), "!string.IsNullOrEmpty(elementName)");
if ((elementsFoundBitField & elementFoundBitMask) == elementFoundBitMask)
{
throw new ODataException(Strings.ODataAtomErrorDeserializer_MultipleErrorElementsWithSameName(elementName));
}
elementsFoundBitField |= elementFoundBitMask;
}
private static void VerifyErrorElementNotFound(ref DuplicateErrorElementPropertyBitMask elementsFoundBitField, DuplicateErrorElementPropertyBitMask elementFoundBitMask, string elementName)
{
if ((elementsFoundBitField & elementFoundBitMask) == elementFoundBitMask)
{
throw new ODataException(Strings.ODataAtomErrorDeserializer_MultipleErrorElementsWithSameName(elementName));
}
elementsFoundBitField |= elementFoundBitMask;
}