Examples of javax.el.MethodExpression

javax.el.MethodExpression
An Expression that refers to a method on an object.
The {@link ExpressionFactory#createMethodExpression} methodcan be used to parse an expression string and return a concrete instance of MethodExpression that encapsulates the parsed expression. The {@link FunctionMapper} is used at parse time, not evaluation time, so one is not needed to evaluate an expression using this class. However, the {@link ELContext} is needed at evaluation time.
The {@link #getMethodInfo} and {@link #invoke} methods will evaluate the expression each time they are called. The {@link ELResolver} in the ELContext is used to resolve the top-level variables and to determine the behavior of the . and [] operators. For any of the two methods, the {@link ELResolver#getValue} method is used to resolve all properties up to but excluding the last one. This provides the base object on which the method appears. If the base object is null, a PropertyNotFoundException must be thrown. At the last resolution, the final property is then coerced to a String, which provides the name of the method to be found. A method matching the name and expected parameters provided at parse time is found and it is either queried or invoked (depending on the method called on this MethodExpression).

See the notes about comparison, serialization and immutability in the {@link Expression} javadocs. @see ELResolver @see Expression @see ExpressionFactory @since JSP 2.1

            if (this.encoding != null) {
                String v = this.encoding.getValue(ctx);
                ctx.getFacesContext().getAttributes().put("facelets.Encoding", v);
            }
            if (this.beforePhase != null) {
                MethodExpression m = this.beforePhase
                        .getMethodExpression(ctx, null, LISTENER_SIG);
                root.setBeforePhaseListener(m);
            }
            if (this.afterPhase != null) {
                MethodExpression m = this.afterPhase
                        .getMethodExpression(ctx, null, LISTENER_SIG);
                root.setAfterPhaseListener(m);
            }
            FacesContext context = ctx.getFacesContext();

View Full Code Here


                String expr = (sourceValue instanceof ValueExpression)
                                 ? ((ValueExpression) sourceValue).getExpressionString()
                                 : sourceValue.toString();
                ExpressionFactory f = ctx.getApplication().getExpressionFactory();
                MethodExpression me = f.createMethodExpression(ctx.getELContext(),
                                                               expr,
                                                               Object.class,
                                                               NO_ARGS);
                ((ActionSource2) target)
                      .setActionExpression(

View Full Code Here

                                 Object sourceValue,
                                 UIComponent target) {


                ValueExpression ve = (ValueExpression) sourceValue;
                ExpressionFactory f = ctx.getApplication().getExpressionFactory();
                MethodExpression me = f.createMethodExpression(ctx.getELContext(),
                                                               ve.getExpressionString(),
                                                               Void.TYPE,
                                                               ACTION_LISTENER_ARGS);
                MethodExpression noArg = f.createMethodExpression(ctx.getELContext(),
                                                                  ve.getExpressionString(),
                                                                  Void.TYPE,
                                                                  NO_ARGS);


                ((ActionSource2) target).addActionListener(

View Full Code Here

        if (FILTER_METHOD.equals(name)) {
          return new Metadata() {
            public void applyMetadata(FaceletContext context, Object object) {
              FacesContext facesContext = context.getFacesContext();
              
              MethodExpression expression = facesContext.getApplication().getExpressionFactory().
                createMethodExpression(facesContext.getELContext(), attribute.getValue(), boolean.class, new Class[]{Object.class});
              ((UIComponent) object).getAttributes().put(FILTER_METHOD, expression);
            }
          };
        }

View Full Code Here

                                 Object sourceValue,
                                 UIComponent target) {


                ValueExpression ve = (ValueExpression) sourceValue;
                ExpressionFactory f = ctx.getApplication().getExpressionFactory();
                MethodExpression me = f.createMethodExpression(ctx.getELContext(),
                                                               ve.getExpressionString(),
                                                               Void.TYPE,
                                                               VALIDATOR_ARGS);


                ((EditableValueHolder) target).addValidator(

View Full Code Here

                                 Object sourceValue,
                                 UIComponent target) {


                ValueExpression ve = (ValueExpression) sourceValue;
                ExpressionFactory f = ctx.getApplication().getExpressionFactory();
                MethodExpression me = f.createMethodExpression(ctx.getELContext(),
                                                               ve.getExpressionString(),
                                                               Void.TYPE,
                                                               VALUE_CHANGE_LISTENER_ARGS);
                MethodExpression noArg = f.createMethodExpression(ctx.getELContext(),
                                                                  ve.getExpressionString(),
                                                                  Void.TYPE,
                                                                  NO_ARGS);


                ((EditableValueHolder) target).addValueChangeListener(

View Full Code Here

                }


                assert (null != expectedReturnType);
                assert (null != expectedParameters);


                MethodExpression me = f
                      .createMethodExpression(ctx.getELContext(),
                                              ve.getExpressionString(),
                                              expectedReturnType,
                                              expectedParameters);
                target.getAttributes().put(metadata.getName(),

View Full Code Here

                LOGGER.fine(MessageFormat.format("Expression ''{0}'' does not follow the syntax #{...}", ref));
            }
            throw new ReferenceSyntaxException(ref);
        }
        FacesContext context = FacesContext.getCurrentInstance();
        MethodExpression result;
        try {
            // return a MethodBinding that wraps a MethodExpression.
            if (null == params) {
                params = RIConstants.EMPTY_CLASS_ARGS;
            }

View Full Code Here

   * @see javax.el.ExpressionFactory#createMethodExpression(javax.el.ELContext, java.lang.String, java.lang.Class, java.lang.Class<?>[])
   */
  public MethodExpression createMethodExpression(ELContext context,
      String expression, Class<?> expectedReturnType,
      Class<?>[] expectedParamTypes) {
    MethodExpression methodExpression = getDefaultFactory().createMethodExpression(context, expression,
            expectedReturnType, expectedParamTypes);
    ValueExpression valueExpression = getDefaultFactory().createValueExpression(context, expression, MethodExpression.class);
    return new StateMethodExpressionWrapper(methodExpression,valueExpression);
  }

View Full Code Here

    try {
      result = parent.invoke(context, params);
    } catch (MethodNotFoundException e) {
      Object base = baseObjectExpression.getValue(context);
      if (base instanceof MethodExpression) {
        MethodExpression referencedMethod = (MethodExpression) base;
        result = referencedMethod.invoke(context, params);
      } else {
        throw e;
      }
    }
    return result;

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of javax.el.MethodExpression

com.caucho.config.el.CandiExpressionFactory

com.google.code.ckJsfEditor.component.Editor

com.liferay.faces.alloy.component.autocomplete.AutoCompleteRenderer

com.sun.faces.application.ApplicationImpl

com.sun.faces.application.MethodBindingMethodExpressionAdapter

com.sun.faces.application.MethodExpressionMethodBindingAdapter

com.sun.faces.application.NavigationHandlerImpl

com.sun.faces.application.view.FaceletViewHandlingStrategy$MethodRetargetHandlerManager$ActionListenerRegargetHandler

com.sun.faces.application.view.FaceletViewHandlingStrategy$MethodRetargetHandlerManager$ActionRegargetHandler

com.sun.faces.application.view.FaceletViewHandlingStrategy$MethodRetargetHandlerManager$ArbitraryMethodRegargetHandler

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.