private Ref xmlPrimaryReference(Context cx, XMLName xmlName, Scriptable scope) { XMLObjectImpl xmlObj; XMLObjectImpl firstXml = null; for (; ; ) { // XML object can only present on scope chain as a wrapper // of XMLWithScope if (scope instanceof XMLWithScope) { xmlObj = (XMLObjectImpl) scope.getPrototype(); if (xmlObj.hasXMLProperty(xmlName)) { break; } if (firstXml == null) { firstXml = xmlObj; } } scope = scope.getParentScope(); if (scope == null) { xmlObj = firstXml; break; } } // xmlObj == null corresponds to undefined as the target of // the reference if (xmlObj != null) { xmlName.initXMLObject(xmlObj); } return xmlName; }