Esempio n. 1
0
 /**
  * Set Environment for Interpreter
  *
  * @param i Interpreter
  */
 private void loadEnvironment(Interpreter i) {
   if (m_ctx == null) return;
   Iterator<String> it = m_ctx.keySet().iterator();
   while (it.hasNext()) {
     String key = it.next();
     Object value = m_ctx.get(key);
     try {
       if (value instanceof Boolean) i.set(key, ((Boolean) value).booleanValue());
       else if (value instanceof Integer) i.set(key, ((Integer) value).intValue());
       else if (value instanceof Double) i.set(key, ((Double) value).doubleValue());
       else i.set(key, value);
     } catch (EvalError ee) {
       log.log(Level.SEVERE, "", ee);
     }
   }
 } //  setEnvironment
Esempio n. 2
0
  /**
   * Set Environment
   *
   * @param prop
   * @param WindowNo included Window variables
   */
  public void setEnvironment(Ctx prop, int WindowNo) {
    if (prop == null) prop = Env.getCtx();

    m_ctx = new HashMap<String, Object>();
    //  Convert properties to HashMap
    Iterator<String> it = prop.keySet().iterator();
    while (it.hasNext()) {
      String key = it.next();
      //  filter
      if (key == null
          || key.length() == 0
          || key.startsWith("P") //  Preferences
          || (key.indexOf("|") != -1
              && !key.startsWith(String.valueOf(WindowNo))) //  other Window Settings
      ) continue;

      String value = prop.getContext(key);
      setEnvironment(key, value);
    }
  } //  setEnvironment
Esempio n. 3
0
  private static Interpreter getInterpreter(String contextId) throws EvalError {
    // Get the appropriate interpreter
    Interpreter i = null;
    boolean createdInterp = false;
    synchronized (interpreters) { // serialize two gets of the same name
      i = interpreters.get(contextId);
      if (i == null) {
        i = new Interpreter();
        interpreters.put(contextId, i);
        createdInterp = true;
      }
    }
    if (createdInterp) {
      Log.log("Created context: " + contextId + " (" + i + ")");

      // Now configure stdin and stdout to capture 10k of content
      // Store references to the circular buffers within the interpreter itself.
      // This provides a nice place to store them plus theoretically allows
      // advanced use from within the bsh environment.
      // On Windows print() outputs \r\n but in XQuery that's normalized to \n
      // so the 10k of Java buffer may produce less than 10k of content in XQuery!
      OutputStream circularOutput = new CircularByteArrayOutputStream(10240);
      PrintStream printOutput = new PrintStream(circularOutput);
      i.setOut(printOutput);
      i.set("mljamout", circularOutput);

      OutputStream circularError = new CircularByteArrayOutputStream(10240);
      PrintStream printError = new PrintStream(circularError);
      i.setErr(printError);
      i.set("mljamerr", circularError);

      // Capture the built-in System.out and System.err also.
      // (Commented out since System appears global, can't do per interpreter.)
      // i.set("mljamprintout", printOutput);
      // i.set("mljamprinterr", printError);
      // i.eval("System.setOut(mljamprintout);");
      // i.eval("System.setErr(mljamprinterr);");

      // Need to expose hexdecode() and base64decode() built-in functions
      i.eval("hexdecode(String s) { return com.xqdev.jam.MLJAM.hexDecode(s); }");
      i.eval("base64decode(String s) { return com.xqdev.jam.MLJAM.base64Decode(s); }");

      // Let's tell the context what its id is
      i.set("mljamid", contextId);
    }

    // Update the last accessed time, used for cleaning
    i.set("mljamlast", System.currentTimeMillis());

    // If it's been long enough, go snooping for stale contexts
    if (System.currentTimeMillis() > lastClean + CLEAN_INTERVAL) {
      Log.log("Initiated periodic scan for stale context objects");
      lastClean = System.currentTimeMillis();
      Iterator<Interpreter> itr = interpreters.values().iterator();
      while (itr.hasNext()) {
        Interpreter interp = itr.next();
        Long last = (Long) interp.get("mljamlast");
        if (System.currentTimeMillis() > last + STALE_TIMEOUT) {
          itr.remove();
          Log.log("Staled context: " + interp.get("mljamid") + " (" + interp + ")");
        } else if ((System.currentTimeMillis() > last + TEMP_STALE_TIMEOUT)
            && ("" + interp.get("mljamid")).startsWith("temp:")) {
          itr.remove();
          Log.log("Staled temp context: " + interp.get("mljamid") + " (" + interp + ")");
        }
      }
    }

    return i;
  }