Examples of javax.el.MethodExpression.invoke()

javax.el.MethodExpression.invoke()
If a String literal is specified as the expression, returns the String literal coerced to the expected return type of the method signature. An ELException is thrown if expectedReturnType is void or if the coercion of the String literal to the expectedReturnType yields an error (see Section "1.18 Type Conversion" of the EL specification). If not a String literal, evaluates the expression relative to the provided context, invokes the method that was found using the supplied parameters, and returns the result of the method invocation. Any parameters passed to this method is ignored if isLiteralText() or isParametersProvided() is true. @param context The context of this evaluation. @param params The parameters to pass to the method, ornull if no parameters. @return the result of the method invocation (null ifthe method has a void return type). @throws NullPointerException if context is null @throws PropertyNotFoundException if one of the propertyresolutions failed because a specified variable or property does not exist or is not readable. @throws MethodNotFoundException if no suitable method can be found. @throws ELException if a String literal is specified andexpectedReturnType of the MethodExpression is void or if the coercion of the String literal to the expectedReturnType yields an error (see Section "1.18 Type Conversion"). @throws ELException if an exception was thrown while performing property or variable resolution. The thrown exception must be included as the cause property of this exception, if available. If the exception thrown is an InvocationTargetException, extract its cause and pass it to the ELException constructor.

   public Object invokeMethod(final FacesContext context, final String expression, Class<?>[] argumentTypes,
         Object[] argumentValues) throws ELException
   {
      ExpressionFactory ef = context.getApplication().getExpressionFactory();
      MethodExpression me = ef.createMethodExpression(context.getELContext(), expression, Object.class, argumentTypes);
      return me.invoke(context.getELContext(), argumentValues);
   }


   public boolean isEl(final String viewId)
   {
      if (viewId == null)

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      FacesContext facesContext = getFacesContext();
      ELContext elContext = facesContext.getELContext();
      ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
      MethodExpression methodExpression = expressionFactory.createMethodExpression(elContext, el,
               Object.class, new Class[values.length]);
      return methodExpression.invoke(elContext, values);
   }


   /**
    * Creates an {@link ValueExpression} for the supplied EL expression
    */

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    if(event instanceof org.primefaces.event.CloseEvent) {
      MethodExpression closeMe = getCloseListener();
      
      if(closeMe != null) {
        closeMe.invoke(facesContext.getELContext(), new Object[] {event});
      }
    } else if(event instanceof org.primefaces.event.ToggleEvent) {
      MethodExpression toggleMe = getToggleListener();
      
      if(toggleMe != null) {

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      }
    } else if(event instanceof org.primefaces.event.ToggleEvent) {
      MethodExpression toggleMe = getToggleListener();
      
      if(toggleMe != null) {
        toggleMe.invoke(facesContext.getELContext(), new Object[] {event});
      }
    }
  }
  
  private Menu optionsMenu;

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    FacesContext facesContext = FacesContext.getCurrentInstance();
    MethodExpression me = getSelectListener();
    
    if (me != null && event instanceof org.primefaces.event.DateSelectEvent) {
      me.invoke(facesContext.getELContext(), new Object[] {event});
    }
  }


  protected FacesContext getFacesContext() {
    return FacesContext.getCurrentInstance();

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    FacesContext facesContext = FacesContext.getCurrentInstance();
    MethodExpression me = getCloseListener();
    
    if (me != null) {
      me.invoke(facesContext.getELContext(), new Object[] {event});
    }
  }


  protected FacesContext getFacesContext() {
    return FacesContext.getCurrentInstance();

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    else if(event instanceof DateSelectEvent) me = getDateSelectListener();
    else if(event instanceof ScheduleEntryMoveEvent) me = getEventMoveListener();
    else if(event instanceof ScheduleEntryResizeEvent) me = getEventResizeListener();
    
    if (me != null) {
      me.invoke(facesContext.getELContext(), new Object[] {event});
    }
  }
  
  public ScheduleEventDialog getEventDialog() {
    if(eventDialog == null) {

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    } else if(event instanceof NodeCollapseEvent) {
      me = getNodeCollapseListener();
    }
    
    if (me != null) {
      me.invoke(facesContext.getELContext(), new Object[] {event});
    }
  }
  
  public UITreeNode getUITreeNodeByType(String type) {
    if(nodes == null) {

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    response.setContentType("application/json");
    
    MethodExpression me = autoComplete.getCompleteMethod();
    String query = facesContext.getExternalContext().getRequestParameterMap().get(clientId + "_query");
    
    List results = (List) me.invoke(facesContext.getELContext(), new Object[]{query});
    writer.write("{");
    writer.write("\"results\" : [");
    
    for(Iterator iterator = results.iterator(); iterator.hasNext();) {
      Object result = iterator.next();

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    FacesContext facesContext = FacesContext.getCurrentInstance();
    MethodExpression me = getFileUploadListener();
    
    if (me != null) {
      me.invoke(facesContext.getELContext(), new Object[] {event});
    }
  }
  
  String getInputFileId(FacesContext facesContext) {
    if(inputFileId == null) {

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