examples.NodeRecorder.testNodeRecorder.cs Maven / Gradle / Ivy

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using System;
using System.Collections.Generic;
using System.Text;
using com.ximpleware;
// This example shows you how to use NodeRecorder feature.
// Node recorder basically saves the internal representation
// of VTDNav into NodeRecorder's internal buffer.
// It is worthnoting that the amount of storage per node is 
// a strong function of structural complexity of the document
// and saving every node of a document into nodeRecorder is
// *not* a good idea!
namespace testNodeRecorder
{
    class testNodeRecorder
    {
        static void Main(string[] args)
        {
            VTDGen vg = new VTDGen();
            int i;
            if (vg.parseFile("po.xml", true))
            {
                // instantiate a node recorder here
                NodeRecorder nr = new NodeRecorder();
                AutoPilot ap = new AutoPilot();
                VTDNav vn = vg.getNav();
                ap.bind(vn);
                // bind node recorder to vn
                nr.bind(vn);
                ap.selectXPath("(/*/*/*)[position()=1 or position()=10]");
                while ((i = ap.evalXPath()) != -1)
                {
                    nr.record(); // save the selected nodes into nr
                }
                ap.resetXPath(); // a good practice
                nr.resetPointer(); // get into nr's read mode
                // iterating over the nodes recorded by nr
                while ((i = nr.iterate()) != -1)
                {
                    Console.WriteLine("string ==>" + vn.toString(i));
                }

                nr.clear(); //remove all the nodes in nr, buffer is however reused
            }
        }
    }
}