/// <summary>
/// Make the Consignments enumerable according to the CREATE section of the doc.
/// Then index the Consignments for each of the relevant sections.
/// Assumption: The CREATE section exists, or we have no Consignments.
/// </summary>
private bool Initialize(IndexBy indexBy)
{
IdPropertyXPath = XPathExpression.Compile("./" + indexBy.ToString() + "/text()");
//determine available sections
hasCreate = doc.NodeExists("/document/CREATE");
hasBook = doc.NodeExists("/document/BOOK");
hasShip = doc.NodeExists("/document/SHIP");
hasPrint = doc.NodeExists("/document/PRINT");
hasError = doc.NodeExists("//ERROR");
hasRuntimeError = doc.NodeExists("/runtime_error");
//prepare iterator and indexes
if (doc.NodeExists("/document"))
{
if (hasCreate)
{
createEnum = doc.GetChildEnumerable(XPathExpression.Compile("/document"), "CREATE");
createIndex = doc.GetChildIndex(XPathExpression.Compile("/document"), "CREATE", IdPropertyXPath);
}
if (hasBook)
{
bookIndex = doc.GetChildIndex(XPathExpression.Compile("/document/BOOK"), "CONSIGNMENT", IdPropertyXPath);
}
if (hasShip)
{
shipIndex = doc.GetChildIndex(XPathExpression.Compile("/document/SHIP"), "CONSIGNMENT", IdPropertyXPath);
}
//...etc
return(true);
}
else
{
return(false); //after all, not worthy of further investigation.
}
}
public override string ToString()
{
return(IndexBy.ToString());
}