Cleanup() private method

private Cleanup ( ) : void
return void
Ejemplo n.º 1
0
        internal XmlReadMode ReadXml(XmlReader reader, XmlReadMode mode, bool denyResolving)
        {
            IntPtr hscp;
            Bid.ScopeEnter(out hscp, "<ds.DataSet.ReadXml|INFO> %d#, mode=%d{ds.XmlReadMode}, denyResolving=%d{bool}\n", ObjectID, (int)mode, denyResolving);
            try {

                XmlReadMode ret = mode;

                if (reader == null)
                    return ret;

                if (mode == XmlReadMode.Auto) {
                    // Dev11 915079: nested ReadXml calls on the same DataSet must be done outside of RowDiffIdUsage scope
                    return ReadXml(reader);
                }

                DataTable.DSRowDiffIdUsageSection rowDiffIdUsage = new DataTable.DSRowDiffIdUsageSection();
                try {

                    bool fSchemaFound = false;
                    bool fDataFound = false;
                    bool fIsXdr = false;
                    int iCurrentDepth = -1;

                    // Dev11 904428: prepare and cleanup rowDiffId hashtable
                    rowDiffIdUsage.Prepare(this);

                    if (reader is XmlTextReader)
                        ((XmlTextReader)reader).WhitespaceHandling = WhitespaceHandling.Significant;

                    XmlDocument xdoc = new XmlDocument(); // we may need this to infer the schema

                    if ((mode != XmlReadMode.Fragment) && (reader.NodeType == XmlNodeType.Element))
                        iCurrentDepth = reader.Depth;

                    reader.MoveToContent();
                    XmlDataLoader xmlload = null;

                    if (reader.NodeType == XmlNodeType.Element) {
                        XmlElement topNode = null;
                        if (mode == XmlReadMode.Fragment) {
                            xdoc.AppendChild(xdoc.CreateElement("ds_sqlXmlWraPPeR"));
                            topNode = xdoc.DocumentElement;
                        }
                        else { //handle the top node
                            if ((reader.LocalName == Keywords.DIFFGRAM) && (reader.NamespaceURI == Keywords.DFFNS)) {
                                if ((mode == XmlReadMode.DiffGram) || (mode == XmlReadMode.IgnoreSchema)) {
                                    this.ReadXmlDiffgram(reader);
                                    // read the closing tag of the current element
                                    ReadEndElement(reader);
                                }
                                else {
                                    reader.Skip();
                                }
                                return ret;
                            }

                            if (reader.LocalName == Keywords.XDR_SCHEMA && reader.NamespaceURI == Keywords.XDRNS) {
                                // load XDR schema and exit
                                if ((mode != XmlReadMode.IgnoreSchema) && (mode != XmlReadMode.InferSchema) &&
                                    (mode != XmlReadMode.InferTypedSchema))
                                {
                                    ReadXDRSchema(reader);
                                }
                                else {
                                    reader.Skip();
                                }
                                return ret; //since the top level element is a schema return
                            }

                            if (reader.LocalName == Keywords.XSD_SCHEMA && reader.NamespaceURI == Keywords.XSDNS) {
                                // load XSD schema and exit
                                if ((mode != XmlReadMode.IgnoreSchema) && (mode != XmlReadMode.InferSchema) &&
                                    (mode != XmlReadMode.InferTypedSchema))
                                {
                                    ReadXSDSchema(reader, denyResolving);
                                }
                                else
                                    reader.Skip();
                                return ret; //since the top level element is a schema return
                            }

                            if (reader.LocalName == Keywords.XSD_SCHEMA && reader.NamespaceURI.StartsWith(Keywords.XSD_NS_START, StringComparison.Ordinal))
                                throw ExceptionBuilder.DataSetUnsupportedSchema(Keywords.XSDNS);

                            // now either the top level node is a table and we load it through dataReader...
                            // ... or backup the top node and all its attributes
                            topNode = xdoc.CreateElement(reader.Prefix, reader.LocalName, reader.NamespaceURI);
                            if (reader.HasAttributes) {
                                int attrCount = reader.AttributeCount;
                                for (int i = 0; i < attrCount; i++) {
                                    reader.MoveToAttribute(i);
                                    if (reader.NamespaceURI.Equals(Keywords.XSD_XMLNS_NS))
                                        topNode.SetAttribute(reader.Name, reader.GetAttribute(i));
                                    else {
                                        XmlAttribute attr = topNode.SetAttributeNode(reader.LocalName, reader.NamespaceURI);
                                        attr.Prefix = reader.Prefix;
                                        attr.Value = reader.GetAttribute(i);
                                    }
                                }
                            }
                            reader.Read();
                        }

                        while (MoveToElement(reader, iCurrentDepth)) {

                            if (reader.LocalName == Keywords.XDR_SCHEMA && reader.NamespaceURI == Keywords.XDRNS) {
                                // load XDR schema
                                if (!fSchemaFound && !fDataFound && (mode != XmlReadMode.IgnoreSchema) && (mode != XmlReadMode.InferSchema) &&
                                    (mode != XmlReadMode.InferTypedSchema))
                                {
                                    ReadXDRSchema(reader);
                                    fSchemaFound = true;
                                    fIsXdr = true;
                                }
                                else {
                                    reader.Skip();
                                }
                                continue;
                            }

                            if (reader.LocalName == Keywords.XSD_SCHEMA && reader.NamespaceURI == Keywords.XSDNS) {
                                // load XSD schema and exit
                                if ((mode != XmlReadMode.IgnoreSchema) && (mode != XmlReadMode.InferSchema) &&
                                    (mode != XmlReadMode.InferTypedSchema))
                                {
                                    ReadXSDSchema(reader, denyResolving);
                                    fSchemaFound = true;
                                }
                                else {
                                    reader.Skip();
                                }
                                continue;
                            }

                            if ((reader.LocalName == Keywords.DIFFGRAM) && (reader.NamespaceURI == Keywords.DFFNS)) {
                                if ((mode == XmlReadMode.DiffGram) || (mode == XmlReadMode.IgnoreSchema)) {
                                    this.ReadXmlDiffgram(reader);
                                    ret = XmlReadMode.DiffGram;
                                }
                                else {
                                    reader.Skip();
                                }
                                continue;
                            }

                            if (reader.LocalName == Keywords.XSD_SCHEMA && reader.NamespaceURI.StartsWith(Keywords.XSD_NS_START, StringComparison.Ordinal))
                                throw ExceptionBuilder.DataSetUnsupportedSchema(Keywords.XSDNS);

                            if (mode == XmlReadMode.DiffGram) {
                                reader.Skip();
                                continue; // we do not read data in diffgram mode
                            }

                            // if we are here we found some data
                            fDataFound = true;

                            if (mode == XmlReadMode.InferSchema || mode == XmlReadMode.InferTypedSchema) { //save the node in DOM until the end;
                                XmlNode node = xdoc.ReadNode(reader);
                                topNode.AppendChild(node);
                            }
                            else {
                                if (xmlload == null)
                                    xmlload = new XmlDataLoader(this, fIsXdr, topNode, mode == XmlReadMode.IgnoreSchema);
                                xmlload.LoadData(reader);
                            }
                        } //end of the while

                        // read the closing tag of the current element
                        ReadEndElement(reader);

                        // now top node contains the data part
                        xdoc.AppendChild(topNode);
                        if (xmlload == null)
                            xmlload = new XmlDataLoader(this, fIsXdr, mode == XmlReadMode.IgnoreSchema);

                        if (mode == XmlReadMode.DiffGram) {
                            // we already got the diffs through XmlReader interface
                            return ret;
                        }

                        // Load Data
                        if (mode == XmlReadMode.InferSchema || mode == XmlReadMode.InferTypedSchema) {
                            InferSchema(xdoc, null, mode);
                            ret = XmlReadMode.InferSchema;
                            xmlload.FromInference = true;
                            //                }
                            try {
                                xmlload.LoadData(xdoc);
                            }
                            finally {
                                xmlload.FromInference = false;
                            }
                        }
                    }

                    return ret;
                }
                finally {
                    // Dev11 904428: prepare and cleanup rowDiffId hashtable
                    rowDiffIdUsage.Cleanup();
                }
            }
            finally {
                Bid.ScopeLeave(ref hscp);
            }
        }
Ejemplo n.º 2
0
        internal XmlReadMode ReadXml(XmlReader reader, bool denyResolving)
        {
            IntPtr hscp;
            Bid.ScopeEnter(out hscp, "<ds.DataSet.ReadXml|INFO> %d#, denyResolving=%d{bool}\n", ObjectID, denyResolving);
            try {
                
                DataTable.DSRowDiffIdUsageSection rowDiffIdUsage = new DataTable.DSRowDiffIdUsageSection();
                try {
                    bool fDataFound = false;
                    bool fSchemaFound = false;
                    bool fDiffsFound = false;
                    bool fIsXdr = false;
                    int iCurrentDepth = -1;
                    XmlReadMode ret = XmlReadMode.Auto;
                    bool isEmptyDataSet = false;
                    bool topNodeIsProcessed = false; // we chanche topnode and there is just one case that we miss to process it
                    // it is : <elem attrib1="Attrib">txt</elem>

                    // clear the hashtable to avoid conflicts between diffgrams, SqlHotFix 782
                    rowDiffIdUsage.Prepare(this);

                    if (reader == null)
                        return ret;

                    if (Tables.Count == 0) {
                        isEmptyDataSet = true;
                    }

                    if (reader is XmlTextReader)
                        ((XmlTextReader)reader).WhitespaceHandling = WhitespaceHandling.Significant;

                    XmlDocument xdoc = new XmlDocument(); // we may need this to infer the schema
                    XmlDataLoader xmlload = null;


                    reader.MoveToContent();

                    if (reader.NodeType == XmlNodeType.Element)
                        iCurrentDepth = reader.Depth;

                    if (reader.NodeType == XmlNodeType.Element) {
                        if ((reader.LocalName == Keywords.DIFFGRAM) && (reader.NamespaceURI == Keywords.DFFNS)) {
                            this.ReadXmlDiffgram(reader);
                            // read the closing tag of the current element
                            ReadEndElement(reader);
                            return XmlReadMode.DiffGram;
                        }

                        // if reader points to the schema load it
                        if (reader.LocalName == Keywords.XDR_SCHEMA && reader.NamespaceURI == Keywords.XDRNS) {
                            // load XDR schema and exit
                            ReadXDRSchema(reader);
                            return XmlReadMode.ReadSchema; //since the top level element is a schema return
                        }

                        if (reader.LocalName == Keywords.XSD_SCHEMA && reader.NamespaceURI == Keywords.XSDNS) {
                            // load XSD schema and exit
                            ReadXSDSchema(reader, denyResolving);
                            return XmlReadMode.ReadSchema; //since the top level element is a schema return
                        }

                        if (reader.LocalName == Keywords.XSD_SCHEMA && reader.NamespaceURI.StartsWith(Keywords.XSD_NS_START, StringComparison.Ordinal))
                            throw ExceptionBuilder.DataSetUnsupportedSchema(Keywords.XSDNS);

                        // now either the top level node is a table and we load it through dataReader...

                        // ... or backup the top node and all its attributes because we may need to InferSchema
                        XmlElement topNode = xdoc.CreateElement(reader.Prefix, reader.LocalName, reader.NamespaceURI);
                        if (reader.HasAttributes) {
                            int attrCount = reader.AttributeCount;
                            for (int i = 0; i < attrCount; i++) {
                                reader.MoveToAttribute(i);
                                if (reader.NamespaceURI.Equals(Keywords.XSD_XMLNS_NS))
                                    topNode.SetAttribute(reader.Name, reader.GetAttribute(i));
                                else {
                                    XmlAttribute attr = topNode.SetAttributeNode(reader.LocalName, reader.NamespaceURI);
                                    attr.Prefix = reader.Prefix;
                                    attr.Value = reader.GetAttribute(i);
                                }
                            }
                        }
                        reader.Read();
                        string rootNodeSimpleContent = reader.Value;

                        while (MoveToElement(reader, iCurrentDepth)) {

                            if ((reader.LocalName == Keywords.DIFFGRAM) && (reader.NamespaceURI == Keywords.DFFNS)) {
                                this.ReadXmlDiffgram(reader);
                                // read the closing tag of the current element
                                // YUKON FIX                            ReadEndElement(reader);
                                //                            return XmlReadMode.DiffGram;
                                ret = XmlReadMode.DiffGram; // continue reading for multiple schemas
                            }

                            // if reader points to the schema load it...


                            if (!fSchemaFound && !fDataFound && reader.LocalName == Keywords.XDR_SCHEMA && reader.NamespaceURI == Keywords.XDRNS) {
                                // load XDR schema and exit
                                ReadXDRSchema(reader);
                                fSchemaFound = true;
                                fIsXdr = true;
                                continue;
                            }

                            if (reader.LocalName == Keywords.XSD_SCHEMA && reader.NamespaceURI == Keywords.XSDNS) {
                                // load XSD schema and exit
                                ReadXSDSchema(reader, denyResolving);
                                fSchemaFound = true;
                                continue;
                            }

                            if (reader.LocalName == Keywords.XSD_SCHEMA && reader.NamespaceURI.StartsWith(Keywords.XSD_NS_START, StringComparison.Ordinal))
                                throw ExceptionBuilder.DataSetUnsupportedSchema(Keywords.XSDNS);

                            if ((reader.LocalName == Keywords.DIFFGRAM) && (reader.NamespaceURI == Keywords.DFFNS)) {
                                this.ReadXmlDiffgram(reader);
                                fDiffsFound = true;
                                ret = XmlReadMode.DiffGram;
                            }
                            else {
                                // We have found data IFF the reader.NodeType == Element and reader.depth == currentDepth-1
                                // if reader.NodeType == whitespace, skip all white spaces.
                                // skip processing i.e. continue if the first non-whitespace node is not of type element.
                                while (!reader.EOF && reader.NodeType == XmlNodeType.Whitespace)
                                    reader.Read();
                                if (reader.NodeType != XmlNodeType.Element)
                                    continue;
                                // we found data here
                                fDataFound = true;

                                if (!fSchemaFound && Tables.Count == 0) {
                                    XmlNode node = xdoc.ReadNode(reader);
                                    topNode.AppendChild(node);
                                }
                                else {
                                    if (xmlload == null)
                                        xmlload = new XmlDataLoader(this, fIsXdr, topNode, false);
                                    xmlload.LoadData(reader);
                                    topNodeIsProcessed = true; // we process the topnode
                                    if (fSchemaFound)
                                        ret = XmlReadMode.ReadSchema;
                                    else
                                        ret = XmlReadMode.IgnoreSchema;
                                }
                            }

                        }
                        // read the closing tag of the current element
                        ReadEndElement(reader);
                        bool isfTopLevelTableSet = false;
                        bool tmpValue = this.fTopLevelTable;
                        //While inference we ignore root elements text content
                        if (!fSchemaFound && Tables.Count == 0 && !topNode.HasChildNodes) { //We shoule not come add SC of root elemnt to topNode if we are not infering
                            this.fTopLevelTable = true;
                            isfTopLevelTableSet = true;
                            if ((rootNodeSimpleContent != null && rootNodeSimpleContent.Length > 0))
                                topNode.InnerText = rootNodeSimpleContent;
                        }
                        if (!isEmptyDataSet) {
                            if ((rootNodeSimpleContent != null && rootNodeSimpleContent.Length > 0))
                                topNode.InnerText = rootNodeSimpleContent;
                        }

                        // now top node contains the data part
                        xdoc.AppendChild(topNode);

                        if (xmlload == null)
                            xmlload = new XmlDataLoader(this, fIsXdr, topNode, false);

                        if (!isEmptyDataSet && !topNodeIsProcessed) {
                            XmlElement root = xdoc.DocumentElement;
                            Debug.Assert(root.NamespaceURI != null, "root.NamespaceURI should not ne null, it should be empty string");
                            // just recognize that below given Xml represents datatable in toplevel
                            //<table attr1="foo" attr2="bar" table_Text="junk">text</table>
                            // only allow root element with simple content, if any
                            if (root.ChildNodes.Count == 0 ||
                                ((root.ChildNodes.Count == 1) && root.FirstChild.GetType() == typeof(System.Xml.XmlText))) {
                                bool initfTopLevelTable = this.fTopLevelTable;
                                // if root element maps to a datatable
                                // ds and dt cant have the samm name and ns at the same time, how to write to xml
                                if (this.DataSetName != root.Name && this.namespaceURI != root.NamespaceURI &&
                                    Tables.Contains(root.Name, (root.NamespaceURI.Length == 0) ? null : root.NamespaceURI, false, true)) {
                                    this.fTopLevelTable = true;
                                }
                                try {
                                    xmlload.LoadData(xdoc);
                                }
                                finally {
                                    this.fTopLevelTable = initfTopLevelTable; // this is not for inference, we have schema and we were skipping
                                    // topnode where it was a datatable, We must restore the value
                                }
                            }
                        }// above check and below check are orthogonal
                        // so we InferSchema
                        if (!fDiffsFound) {
                            // Load Data
                            if (!fSchemaFound && Tables.Count == 0) {
                                InferSchema(xdoc, null, XmlReadMode.Auto);
                                ret = XmlReadMode.InferSchema;
                                xmlload.FromInference = true;
                                try {
                                    xmlload.LoadData(xdoc);
                                }
                                finally {
                                    xmlload.FromInference = false;
                                }
                            }
                            //We dont need this assignement. Once we set it(where we set it during inference), it won't be changed
                            if (isfTopLevelTableSet)
                                this.fTopLevelTable = tmpValue;
                        }
                    }

                    return ret;
                }
                finally {
                    rowDiffIdUsage.Cleanup();
                }
            }
            finally {
                Bid.ScopeLeave(ref hscp);
            }
        }