/// <summary> /// Try to read the message property value of an error value. /// </summary> /// <param name="error">An <see cref="ODataError"/> instance to set the read message property values on.</param> /// <returns>true if the message property values could be read; otherwise false.</returns> private bool TryReadMessagePropertyValue(ODataError error) { Debug.Assert(error != null, "error != null"); Debug.Assert(this.currentBufferedNode.NodeType == JsonNodeType.Property, "this.currentBufferedNode.NodeType == JsonNodeType.Property"); Debug.Assert(this.parsingInStreamError, "this.parsingInStreamError"); this.AssertBuffering(); // move the reader onto the property value this.ReadInternal(); // we expect a start-object node here if (this.currentBufferedNode.NodeType != JsonNodeType.StartObject) { return(false); } // read the start-object node this.ReadInternal(); // we expect one of the supported properties for the value (or end-object) ODataVerboseJsonReaderUtils.ErrorPropertyBitMask propertiesFoundBitmask = ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.None; while (this.currentBufferedNode.NodeType == JsonNodeType.Property) { // NOTE the Json reader already ensures that the value of a property node is a string string propertyName = (string)this.currentBufferedNode.Value; switch (propertyName) { case JsonConstants.ODataErrorMessageLanguageName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.MessageLanguage)) { return(false); } string lang; if (this.TryReadErrorStringPropertyValue(out lang)) { error.MessageLanguage = lang; } else { return(false); } break; case JsonConstants.ODataErrorMessageValueName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.MessageValue)) { return(false); } string message; if (this.TryReadErrorStringPropertyValue(out message)) { error.Message = message; } else { return(false); } break; default: // if we find a non-supported property we don't treat this as an error return(false); } this.ReadInternal(); } Debug.Assert(this.currentBufferedNode.NodeType == JsonNodeType.EndObject, "this.currentBufferedNode.NodeType == JsonNodeType.EndObject"); return(true); }
/// <summary> /// Try to read an inner error property value. /// </summary> /// <param name="innerError">An <see cref="ODataInnerError"/> instance that was read from the reader or null if none could be read.</param> /// <param name="recursionDepth">The number of times this method has been called recursively.</param> /// <returns>true if an <see cref="ODataInnerError"/> instance that was read; otherwise false.</returns> private bool TryReadInnerErrorPropertyValue(out ODataInnerError innerError, int recursionDepth) { Debug.Assert(this.currentBufferedNode.NodeType == JsonNodeType.Property, "this.currentBufferedNode.NodeType == JsonNodeType.Property"); Debug.Assert(this.parsingInStreamError, "this.parsingInStreamError"); this.AssertBuffering(); ValidationUtils.IncreaseAndValidateRecursionDepth(ref recursionDepth, this.maxInnerErrorDepth); // move the reader onto the property value this.ReadInternal(); // we expect a start-object node here if (this.currentBufferedNode.NodeType != JsonNodeType.StartObject) { innerError = null; return(false); } // read the start-object node this.ReadInternal(); innerError = new ODataInnerError(); // we expect one of the supported properties for the value (or end-object) ODataVerboseJsonReaderUtils.ErrorPropertyBitMask propertiesFoundBitmask = ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.None; while (this.currentBufferedNode.NodeType == JsonNodeType.Property) { // NOTE the Json reader already ensures that the value of a property node is a string string propertyName = (string)this.currentBufferedNode.Value; switch (propertyName) { case JsonConstants.ODataErrorInnerErrorMessageName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.MessageValue)) { return(false); } string message; if (this.TryReadErrorStringPropertyValue(out message)) { innerError.Message = message; } else { return(false); } break; case JsonConstants.ODataErrorInnerErrorTypeNameName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.TypeName)) { return(false); } string typeName; if (this.TryReadErrorStringPropertyValue(out typeName)) { innerError.TypeName = typeName; } else { return(false); } break; case JsonConstants.ODataErrorInnerErrorStackTraceName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.StackTrace)) { return(false); } string stackTrace; if (this.TryReadErrorStringPropertyValue(out stackTrace)) { innerError.StackTrace = stackTrace; } else { return(false); } break; case JsonConstants.ODataErrorInnerErrorInnerErrorName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.InnerError)) { return(false); } ODataInnerError nestedInnerError; if (this.TryReadInnerErrorPropertyValue(out nestedInnerError, recursionDepth)) { innerError.InnerError = nestedInnerError; } else { return(false); } break; default: // if we find a non-supported property in an inner error, we skip it this.SkipValueInternal(); break; } this.ReadInternal(); } Debug.Assert(this.currentBufferedNode.NodeType == JsonNodeType.EndObject, "this.currentBufferedNode.NodeType == JsonNodeType.EndObject"); return(true); }
/// <summary> /// Try to read an error structure from the stream. Return null if no error structure can be read. /// </summary> /// <param name="error">An <see cref="ODataError"/> instance that was read from the reader or null if none could be read.</param> /// <returns>true if an <see cref="ODataError"/> instance that was read; otherwise false.</returns> private bool TryReadInStreamErrorPropertyValue(out ODataError error) { Debug.Assert(this.parsingInStreamError, "this.parsingInStreamError"); this.AssertBuffering(); error = null; // we expect a start-object node here if (this.currentBufferedNode.NodeType != JsonNodeType.StartObject) { return(false); } // read the start-object node this.ReadInternal(); error = new ODataError(); // we expect one of the supported properties for the value (or end-object) ODataVerboseJsonReaderUtils.ErrorPropertyBitMask propertiesFoundBitmask = ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.None; while (this.currentBufferedNode.NodeType == JsonNodeType.Property) { // NOTE the Json reader already ensures that the value of a property node is a string string propertyName = (string)this.currentBufferedNode.Value; switch (propertyName) { case JsonConstants.ODataErrorCodeName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.Code)) { return(false); } string errorCode; if (this.TryReadErrorStringPropertyValue(out errorCode)) { error.ErrorCode = errorCode; } else { return(false); } break; case JsonConstants.ODataErrorMessageName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.Message)) { return(false); } if (!this.TryReadMessagePropertyValue(error)) { return(false); } break; case JsonConstants.ODataErrorInnerErrorName: if (!ODataVerboseJsonReaderUtils.ErrorPropertyNotFound(ref propertiesFoundBitmask, ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.InnerError)) { return(false); } ODataInnerError innerError; if (!this.TryReadInnerErrorPropertyValue(out innerError, 0 /*recursionDepth */)) { return(false); } error.InnerError = innerError; break; default: // if we find a non-supported property we don't treat this as an error return(false); } this.ReadInternal(); } // read the end object Debug.Assert(this.currentBufferedNode.NodeType == JsonNodeType.EndObject, "this.currentBufferedNode.NodeType == JsonNodeType.EndObject"); this.ReadInternal(); // if we don't find any properties it is not a valid error object return(propertiesFoundBitmask != ODataVerboseJsonReaderUtils.ErrorPropertyBitMask.None); }