OQL samples

classloaders.js

//----------------- class looader and loaded classes
select map(heap.objects('java.lang.ClassLoader'), function (it) {
  var res = '';
  res += "<br/>ClassLoader " + toHtml(it) + "<br/>";
  res += listLoadedClasses(it);
  return res + "<br>";
  function listLoadedClasses(cl) {
    var res = "";
    if (cl.classes != null) {
      if (cl.classes.elementData != null) {
        var classes = toArray(cl.classes.elementData);
        for (var i = 0; i < classes.length; i++) {
          if (classes[i] != null) {
            res += "    " + toHtml(classes[i]) + " instance count: " +
                 count(heap.objects(classes[i])) + "<br/>";
          }
        }
      }
    }
    return res;
  }
})

xml-xerces.js

select map(heap.objects('org.apache.xerces.dom.DeferredDocumentImpl'), function(it) {
  function contains(a, obj) {
      var i = a.length;
      while (i--) {
         if (a[i] == obj) {
             return true;
         }
      }
      return false;
  }
  function containsid(a, obj) {
        var i = a.length;
        while (i--) {
           if (objectid(a[i]) == objectid(obj)) {
               return true;
           }
        }
        return false;
    }
  function descNodeListCache(nl) {
    var t = '<div style="border: 1px dashed grey; margin: 4px;">';
    t += toHtml(nl);
    t += '<br/>fChild: ' + toHtml(nl.fChild);
    t += '<br/>fChildIndex: ' + nl.fChildIndex;
    t += '<br/>fLength: ' + nl.fLength;
    t += '<br/>next: ' + toHtml(nl.next);
    if (nl.fChildIndex >= 0) t += '<br/>Active NodeListCache';
    return t + '</div>\n';
  }
  function getFChildInNodeListCache(nl) {
    if (nl == null) return null;
    return nl.fChild;
  }
  function getFLengthInNodeListCache(nl) {
    if (nl == null) return -2;
    return nl.fLength;
  }
  function descNode(node) {
    var t = '<div style="border: 1px dashed grey; margin: 4px;">';
    if (node != null) {
      t += toHtml(node);
      if (node.localName != null) {
        t += "<br/>localName: " + node.localName.value.toString();
      }
      if (node.name != null) {
        t += "<br/>name: " + node.name.value.toString();
      }
      t += '<br/>nextSibling: ' + toHtml(node.nextSibling);
      t += '<br/>previousSibling: ' + toHtml(node.previousSibling);
      var fChildInCache = null;
      var fLengthInCache = -3;
      if (classof(node).isSubclassOf(heap.findClass("org.apache.xerces.dom.ParentNode"))) {
              t += "<br/>fNodeListCache: ";
              if (node.fNodeListCache != null) {
                t += descNodeListCache(node.fNodeListCache);
                fChildInCache = getFChildInNodeListCache(node.fNodeListCache);
                fLengthInCache = getFLengthInNodeListCache(node.fNodeListCache);
              } else {
                t += "(null)";
              }
            }
      t += "<br/>firstChild: " + toHtml(node.firstChild);
      var children = new Array();
      if (node.firstChild != null) {
        var child = node.firstChild;
        while (child != null) {
          children.push(child);
          t += descNode(child);
          child = child.nextSibling;
        }
      }
      if (fChildInCache != null) {
        if (containsid(children, fChildInCache) == false) {
          t += "<br/>ERROR: fChild " + toHtml(fChildInCache) +
              " is not on the firstChild list of " + toHtml(node) +
              " ownerDoc: " + toHtml(node.ownerDocument);
          t += "<br/>Cache fLength = " + fLengthInCache;
          t += "<br/> nodes len = " + children.length + " nodes are: ";
          for (i = 0; i < children.length; i++) {
            t += "<br/>" + toHtml(children[i]);
          }
        }
      }
    }
    return t + '</div>\n';
  }
  var res = '<div style="font-family: Menlo, Courier, monospace; font-size: small;">';
  res += toHtml(it);
  res += '<br/>fDocumentURI: ' ;
  if (it.fDocumentURI == null)  res += '(null)';
  else res += it.fDocumentURI.value.toString();
  res += ' <br/>fNodeCacheList: ';
  res += toHtml(it.fNodeCacheList);
  res += ' <br/>firstChild: ';
  res += toHtml(it.firstChild);
  if (it.firstChild != null) {
    var child = it.firstChild;
    while (child != null) {
      res += descNode(child);
      child = child.nextSibling;
    }
  }
  return res + '</div><hr/>';
})