[Vtd-xml-users] Randomly save and restore VTDNav's context

[Dmitry F. <dim...@gm...>]

Hello.

For my app, it's very convinient to save current context of VTDNav and
restore it whenever I want.

But there's only two ways to save/restore context I know from the docs:
push()/pop(), and NodeRecorder.

Neither of these ways are convinient for me: I need for really random
access. Not stack way, like push()/pop(), and no NodeRecorder way. that can
only iterate saved items node-by-node.

I need to be able to get context as a byte array, and to restore it in the
same manner.

So, I added the following methods to the VTDNav.java :

/**
 * Return context that can be restored later by calling restoreContext().
 * by dfrank.
 */public int[] getContext() {
   int[] ret = new int[ stackTemp.length ];
   for (int i = 0; i < nestingLevel; i++) {
      ret[i] = context[i];
   }
   ret[nestingLevel] = l1index;
   ret[nestingLevel + 1] = l2index;
   ret[nestingLevel + 2] = l3index;
   ret[nestingLevel + 3] = l2lower;
   ret[nestingLevel + 4] = l2upper;
   ret[nestingLevel + 5] = l3lower;
   ret[nestingLevel + 6] = l3upper;
   if (atTerminal)
      ret[nestingLevel + 7] =1;
   else
      ret[nestingLevel + 7] =0;
   ret[nestingLevel+8] = LN;
   return ret;}
 /**
 * Restore context that was returned by getContext().
 * by dfrank.
 */public boolean restoreContext(int[] saved_context) {
   for (int i = 0; i < nestingLevel; i++) {
      context[i] = saved_context[i];
   }
   l1index = saved_context[nestingLevel];
   l2index = saved_context[nestingLevel + 1];
   l3index = saved_context[nestingLevel + 2];
   l2lower = saved_context[nestingLevel + 3];
   l2upper = saved_context[nestingLevel + 4];
   l3lower = saved_context[nestingLevel + 5];
   l3upper = saved_context[nestingLevel + 6];
   atTerminal = (saved_context[nestingLevel + 7] == 1);
   LN = saved_context[nestingLevel+8];
   return true;}



These methods work nicely, and they help me a lot to do what I need.

So, questions:
Why there's no similar methods in the release of VTD-XML? Do them break
anything, or whatever?


--
Dmitry