/// <summary>
/// Implements the following function
/// node-set subset(node-set, node-set)
/// </summary>
/// <param name="nodeset1">An input nodeset</param>
/// <param name="nodeset2">Another input nodeset</param>
/// <returns>True if all the nodes in the first nodeset are contained
/// in the second nodeset</returns>
/// <remarks>THIS FUNCTION IS NOT PART OF EXSLT!!!</remarks>
public static bool subset(XPathNodeIterator nodeset1, XPathNodeIterator nodeset2){
ExsltNodeList nodelist1 = new ExsltNodeList(nodeset1, true);
ExsltNodeList nodelist2 = new ExsltNodeList(nodeset2, true);
foreach(XPathNavigator nav in nodelist1){
if(!nodelist2.Contains(nav)){
return false;
}
}
return true;
}
/// <summary>
/// Implements
/// boolean hassamenode(node-set, node-set)
/// </summary>
/// <param name="nodeset1"></param>
/// <param name="nodeset2"></param>
/// <returns>true if both nodeset contain at least one of the same node</returns>
public static bool hassamenode(XPathNodeIterator nodeset1, XPathNodeIterator nodeset2)
{
ExsltNodeList nodelist1 = new ExsltNodeList(nodeset1, true);
ExsltNodeList nodelist2 = new ExsltNodeList(nodeset2, true);
foreach (XPathNavigator nav in nodelist1)
{
if (nodelist2.Contains(nav))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Implements the following function
/// node-set difference(node-set, node-set)
/// </summary>
/// <param name="nodeset1">An input nodeset</param>
/// <param name="nodeset2">Another input nodeset</param>
/// <returns>The those nodes that are in the node set
/// passed as the first argument that are not in the node set
/// passed as the second argument.</returns>
public static XPathNodeIterator difference(XPathNodeIterator nodeset1, XPathNodeIterator nodeset2){
ExsltNodeList nodelist1 = new ExsltNodeList(nodeset1, true);
ExsltNodeList nodelist2 = new ExsltNodeList(nodeset2);
for(int i = 0; i < nodelist1.Count; i++){
XPathNavigator nav = nodelist1[i];
if(nodelist2.Contains(nav)){
nodelist1.RemoveAt(i);
i--;
}
}
return ExsltCommon.ExsltNodeListToXPathNodeIterator(nodelist1);
}
/// <summary>
/// Implements the following function
/// node-set difference(node-set, node-set)
/// </summary>
/// <param name="nodeset1">An input nodeset</param>
/// <param name="nodeset2">Another input nodeset</param>
/// <returns>The those nodes that are in the node set
/// passed as the first argument that are not in the node set
/// passed as the second argument.</returns>
public static XPathNodeIterator difference(XPathNodeIterator nodeset1, XPathNodeIterator nodeset2)
{
ExsltNodeList nodelist1 = new ExsltNodeList(nodeset1, true);
ExsltNodeList nodelist2 = new ExsltNodeList(nodeset2);
for (int i = 0; i < nodelist1.Count; i++)
{
XPathNavigator nav = nodelist1[i];
if (nodelist2.Contains(nav))
{
nodelist1.RemoveAt(i);
i--;
}
}
return(ExsltCommon.ExsltNodeListToXPathNodeIterator(nodelist1));
}