public String getInputType() {
   if (pathArgumentList.size() > 0) {
     Object argument = pathArgumentList.get(0);
     if (argument != null && argument instanceof SynapseXPath) {
       return XML_TYPE;
     } else if (argument != null && argument instanceof SynapseJsonPath) {
       return JSON_TYPE;
     }
   }
   return null;
 }
 /**
  * Goes through SynapsePath argument list, evaluating each by calling stringValueOf and returns a
  * HashMap String, String array where each item will contain a hash map with key "evaluated
  * expression" and value "SynapsePath type".
  *
  * @param synCtx
  * @return
  */
 private HashMap<String, String>[] getArgValues(MessageContext synCtx) {
   HashMap<String, String>[] argValues = new HashMap[pathArgumentList.size()];
   HashMap<String, String> valueMap;
   String value = "";
   for (int i = 0; i < pathArgumentList.size(); ++i) {
       /*ToDo use foreach*/
     Argument arg = pathArgumentList.get(i);
     if (arg.getValue() != null) {
       value = arg.getValue();
       if (!isWellFormedXML(value)) {
         value = StringEscapeUtils.escapeXml(value);
       }
       value = Matcher.quoteReplacement(value);
     } else if (arg.getExpression() != null) {
       value = arg.getExpression().stringValueOf(synCtx);
       if (value != null) {
         // XML escape the result of an expression that produces a literal, if the target format
         // of the payload is XML.
         if (!isWellFormedXML(value)
             && !arg.getExpression().getPathType().equals(SynapsePath.JSON_PATH)
             && XML_TYPE.equals(getType())) {
           value = StringEscapeUtils.escapeXml(value);
         }
         value = Matcher.quoteReplacement(value);
       } else {
         value = "";
       }
     } else {
       handleException("Unexpected arg type detected", synCtx);
     }
     // value = value.replace(String.valueOf((char) 160), " ").trim();
     valueMap = new HashMap<String, String>();
     if (null != arg.getExpression()) {
       valueMap.put(value, arg.getExpression().getPathType());
     } else {
       valueMap.put(value, SynapsePath.X_PATH);
     }
     argValues[i] = valueMap;
   }
   return argValues;
 }