public abstract ToNavigator ( ) : |
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리턴 |
public static XPathNavigator ToNode(XPathItem item) { XsltLibrary.CheckXsltValue(item); if (!item.IsNode) { // Create Navigator over text node containing string value of item XPathDocument doc = new XPathDocument(); XmlRawWriter writer = doc.LoadFromWriter(XPathDocument.LoadFlags.AtomizeNames, string.Empty); writer.WriteString(ToString(item)); writer.Close(); return(doc.CreateNavigator()); } RtfNavigator rtf = item as RtfNavigator; if (rtf != null) { return(rtf.ToNavigator()); } return((XPathNavigator)item); }
/// <summary> /// Convert from the Clr type of "value" to Clr type "destinationType" using V1 Xslt rules. /// These rules include converting any Rtf values to Nodes. /// </summary> internal object ChangeTypeXsltArgument(XmlQueryType xmlType, object value, Type destinationType) { #if FEATURE_COMPILED_XSL Debug.Assert(XmlILTypeHelper.GetStorageType(xmlType).IsAssignableFrom(value.GetType()), "Values passed to ChangeTypeXsltArgument should be in ILGen's default Clr representation."); #endif Debug.Assert(destinationType == XsltConvert.ObjectType || !destinationType.IsAssignableFrom(value.GetType()), "No need to call ChangeTypeXsltArgument since value is already assignable to destinationType " + destinationType); switch (xmlType.TypeCode) { case XmlTypeCode.String: if (destinationType == XsltConvert.DateTimeType) { value = XsltConvert.ToDateTime((string)value); } break; case XmlTypeCode.Double: if (destinationType != XsltConvert.DoubleType) { value = Convert.ChangeType(value, destinationType, CultureInfo.InvariantCulture); } break; case XmlTypeCode.Node: Debug.Assert(xmlType != XmlQueryTypeFactory.Node && xmlType != XmlQueryTypeFactory.NodeS, "Rtf values should have been eliminated by caller."); if (destinationType == XsltConvert.XPathNodeIteratorType) { value = new XPathArrayIterator((IList)value); } else if (destinationType == XsltConvert.XPathNavigatorArrayType) { // Copy sequence to XPathNavigator[] IList <XPathNavigator> seq = (IList <XPathNavigator>)value; XPathNavigator[] navArray = new XPathNavigator[seq.Count]; for (int i = 0; i < seq.Count; i++) { navArray[i] = seq[i]; } value = navArray; } break; case XmlTypeCode.Item: { // Only typeof(object) is supported as a destination type if (destinationType != XsltConvert.ObjectType) { throw new XslTransformException(SR.Xslt_UnsupportedClrType, destinationType.Name); } // Convert to default, backwards-compatible representation // 1. NodeSet: System.Xml.XPath.XPathNodeIterator // 2. Rtf: System.Xml.XPath.XPathNavigator // 3. Other: Default V1 representation IList <XPathItem> seq = (IList <XPathItem>)value; if (seq.Count == 1) { XPathItem item = seq[0]; if (item.IsNode) { // Node or Rtf RtfNavigator rtf = item as RtfNavigator; if (rtf != null) { value = rtf.ToNavigator(); } else { value = new XPathArrayIterator((IList)value); } } else { // Atomic value value = item.TypedValue; } } else { // Nodeset value = new XPathArrayIterator((IList)value); } break; } } Debug.Assert(destinationType.IsAssignableFrom(value.GetType()), "ChangeType from type " + value.GetType().Name + " to type " + destinationType.Name + " failed"); return(value); }