Examples of org.zkoss.zk.ui.Execution.evaluate()

org.zkoss.zk.ui.Execution.evaluate()

Evluates the specified expression with ${link #getVariableResolver} and {@link Page#getFunctionMapper} of the page of the specifiedcomponent.

The function mapper is retrieved from component's page's function mapper ( {@link Page#getFunctionMapper}). If null, the current page, if any, is used to retrieve the mapper.

For better performance, you can use the instance returned by {@link #getEvaluator} to parse and cached the parsed expression.{@link org.zkoss.zk.xel.ExValue} is a utility class to simplythe task. @param comp used as the self variable and to retrieve the functionmapper. Ignored if null. @see #getVariableResolver @see #getEvaluator

    if (!_title.equals(title)) {
      _title = title;
      if (_desktop != null) {
        final Execution exec = getExecution();
        if (_title.length() > 0) {
          _title = (String)exec.evaluate(this, _title, String.class);
          if (_title == null) _title = "";
        }


        if (exec.isAsyncUpdate(this))
          getUiEngine().addResponse(new AuSetTitle(_title));

    if (!_style.equals(style)) {
      _style = style;
      if (_desktop != null) {
        final Execution exec = getExecution();
        if (_style.length() > 0) {
          _style = (String)exec.evaluate(this, _style, String.class);
          if (_style == null) _style = "";
        }
        //FUTURE: might support the change of style dynamically
      }
    }

      _uuid = ((DesktopCtrl)_desktop).getNextUuid(this);


      if (_id == null || _id.length() == 0)
        _id = config.getId();
      if (_id != null)
        _id = (String)exec.evaluate(this, _id, String.class);
      if (_id == null) {
        _id = "";
      } else if (_id.length() != 0) {
        final String INVALID = ".&\\%";
        if (Strings.anyOf(_id, INVALID, 0) < _id.length())

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