/// <summary>
/// This method parses xml using a <c>StringReader</c> instance and returns an <c>Xml</c> instance
/// containing the parsed data.
/// </summary>
/// <param name="stringReader">The <c>StringReader</c> instance containing the xml data to parse</param>
/// <returns>An <c>Xml</c> instance containing the parsed data.</returns>
public Xml Parse(StringReader stringReader)
{
using (XmlReader reader = XmlReader.Create(stringReader, _settings)) {
Xml currentElement = null;
Stack<Xml> elementStack = new Stack<Xml>();
while (reader.Read()) {
switch (reader.NodeType) {
// Handle Open Element, <element>
case XmlNodeType.Element:
Xml xmlElement = new Xml(reader.Name, reader.NamespaceURI);
// Check for Attributes and Read All Attributes
if (reader.HasAttributes) {
while (reader.MoveToNextAttribute()) {
xmlElement.AddAttribute(reader.Name, reader.Value);
}
// Move back to the element
reader.MoveToElement();
}
// Handles node that only contains attributes: <someNode x='10' y='5'/>
if (!reader.HasValue && reader.IsEmptyElement) {
currentElement.AppendElement(xmlElement);
break;
}
elementStack.Push(xmlElement);
if (currentElement == null) {
currentElement = xmlElement;
} else {
currentElement.AppendElement(xmlElement);
currentElement = xmlElement;
}
break;
// Handle attribute or element text, ... prop="myProp" ...
case XmlNodeType.Text:
currentElement.Value = reader.Value;
break;
// Handle end element, </element>
case XmlNodeType.EndElement:
if (elementStack.Count > 1) {
elementStack.Pop();
currentElement = elementStack.Peek();
} else if (elementStack.Count > 0) {
elementStack.Pop();
}
break;
}
}
return currentElement;
}
}
/// <summary>
/// This method sets the parent for the <c>Xml</c> node.
/// </summary>
/// <param name="parent"></param>
private void SetParent(Xml parent)
{
_parent = parent;
}
/// <summary>
/// This method appends additional XML elements to this node.
/// </summary>
/// <param name="element"></param>
public void AppendElement(Xml element)
{
if (_isUndefined) {
throw new Exception("Cannot append elements to an undefined Xml node.");
}
if (!_elements.ContainsKey(element.Name)) {
_elements[element.Name] = new List<Xml>();
}
_elements[element.Name].Add(element);
element.SetParent(this);
}
/// <summary>
/// This method creates a cloned copy of this instance and returns it.
/// </summary>
public Xml Clone()
{
if (_isUndefined) {
throw new Exception("Cannot clone the undefined Xml node.");
}
Xml clone = new Xml(_name, _namespaceUri);
foreach (string key in _attributes.Keys) {
clone.AddAttribute(key, _attributes[key]);
}
foreach (Xml element in Elements) {
clone.AppendElement(element);
}
clone.Value = Value;
return clone;
}
/// <summary>
/// This static method compares two <c>Xml</c> instances and returns their
/// equality based on their <c>Value</c> property.
/// </summary>
/// <param name="node1">The first node to compare</param>
/// <param name="node2">The second node to compare</param>
/// <returns>A <c>true</c> if the two nodes are equal, otherwise <c>false</c></returns>
public static Boolean Equals(Xml node1, Xml node2)
{
if (Xml.ReferenceEquals(node1, node2)) {
return true;
}
return node1.Equals(node2);
}
