Program: 120331
Project: 120331
Buggy source:
protected TreeItem getTreeItem(Tree tree,Object dataOfTreeItem,Object dataOfTableItem){
  String path=null;
  if (dataOfTableItem instanceof SchemaTarget) {
    SchemaTarget target=(SchemaTarget)dataOfTableItem;
    path=target.getRelativeXPathQuery();
  }
 else   if (dataOfTableItem instanceof JSONXPathLoopDescriptor) {
    JSONXPathLoopDescriptor target=(JSONXPathLoopDescriptor)dataOfTableItem;
    path=target.getAbsoluteXPathQuery();
  }
  if (path == null)   return super.getTreeItem(tree,dataOfTreeItem,dataOfTableItem);
  boolean expressionIsAbsolute=false;
  if (path.trim().startsWith("String_Node_Str")) {
    expressionIsAbsolute=true;
  }
  String fullPath="String_Node_Str";
  if (!expressionIsAbsolute) {
    if (loopXpathNodes.size() > 0) {
      fullPath=loopXpathNodes.get(0) + "String_Node_Str";
    }
    String[] relatedSplitedPaths=path.split("String_Node_Str");
    if (relatedSplitedPaths.length > 1) {
      int pathsToRemove=relatedSplitedPaths.length - 1;
      String[] fullPathSplited=fullPath.split("String_Node_Str");
      fullPath="String_Node_Str";
      for (int j=1; j < (fullPathSplited.length - pathsToRemove); j++) {
        fullPath+="String_Node_Str" + fullPathSplited[j];
      }
      fullPath+="String_Node_Str" + relatedSplitedPaths[pathsToRemove];
    }
 else {
      fullPath+=path;
    }
  }
 else {
    fullPath=path;
  }
  TreeItem treeItem=treePopulator.getTreeItem(fullPath);
  if (treeItem != null) {
    return treeItem;
  }
 else {
    return super.getTreeItem(tree,dataOfTreeItem,dataOfTableItem);
  }
}

Fixed version (ground truth):
@Override protected TreeItem getTreeItem(Tree tree,Object dataOfTreeItem,Object dataOfTableItem){
  String path=null;
  if (dataOfTableItem instanceof SchemaTarget) {
    SchemaTarget target=(SchemaTarget)dataOfTableItem;
    path=target.getRelativeXPathQuery();
  }
 else   if (dataOfTableItem instanceof JSONXPathLoopDescriptor) {
    JSONXPathLoopDescriptor target=(JSONXPathLoopDescriptor)dataOfTableItem;
    path=target.getAbsoluteXPathQuery();
  }
  if (path == null) {
    return super.getTreeItem(tree,dataOfTreeItem,dataOfTableItem);
  }
  boolean expressionIsAbsolute=false;
  if (path.trim().startsWith("String_Node_Str")) {
    expressionIsAbsolute=true;
  }
  String fullPath="String_Node_Str";
  if (!expressionIsAbsolute) {
    if (loopXpathNodes.size() > 0) {
      fullPath=loopXpathNodes.get(0) + "String_Node_Str";
    }
    String[] relatedSplitedPaths=path.split("String_Node_Str");
    if (relatedSplitedPaths.length > 1) {
      int pathsToRemove=relatedSplitedPaths.length - 1;
      String[] fullPathSplited=fullPath.split("String_Node_Str");
      fullPath="String_Node_Str";
      for (int j=1; j < (fullPathSplited.length - pathsToRemove); j++) {
        fullPath+="String_Node_Str" + fullPathSplited[j];
      }
      fullPath+="String_Node_Str" + relatedSplitedPaths[pathsToRemove];
    }
 else {
      fullPath+=path;
    }
  }
 else {
    fullPath=path;
  }
  TreeItem treeItem=treePopulator.getTreeItem(fullPath);
  if (treeItem != null) {
    return treeItem;
  }
 else {
    return super.getTreeItem(tree,dataOfTreeItem,dataOfTableItem);
  }
}