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.


      MethodExpression methodExpression =
          expressionFactory.createMethodExpression(context, value, Void.TYPE,
              new Class<?>[]
              { ActionEvent.class });
      methodExpression.invoke(context, new Object[]{ event });
    }


  }
  
  /**

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        assertEquals("B", me1.invoke(context, null));
        assertEquals("Hello JUnit from B", me2.invoke(context, null));
        assertEquals("Hello JUnit from B",
                me2.invoke(context, new Object[] { "JUnit2" }));
        assertEquals("Hello JUnit2 from B",
                me3.invoke(context, new Object[] { "JUnit2" }));
        assertEquals("Hello JUnit from B",
                me2.invoke(context, new Object[] { null }));
        assertEquals("Hello null from B",
                me3.invoke(context, new Object[] { null }));
    }

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        assertEquals("Hello JUnit2 from B",
                me3.invoke(context, new Object[] { "JUnit2" }));
        assertEquals("Hello JUnit from B",
                me2.invoke(context, new Object[] { null }));
        assertEquals("Hello null from B",
                me3.invoke(context, new Object[] { null }));
    }


    public void testInvokeWithSuper() {
        MethodExpression me = factory.createMethodExpression(context,
                "${beanA.setBean(beanBB)}", null ,

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    public void testInvokeWithSuper() {
        MethodExpression me = factory.createMethodExpression(context,
                "${beanA.setBean(beanBB)}", null ,
                new Class<?>[] { TesterBeanB.class });
        me.invoke(context, null);
        ValueExpression ve = factory.createValueExpression(context,
                "${beanA.bean.name}", String.class);
        Object r = ve.getValue(context);
        assertEquals("BB", r);
    }

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    }
    
    public void testInvokeWithSuperABNoReturnTypeNoParamTypes() {
        MethodExpression me2 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanA,beanB)}", null , null);
        Object r2 = me2.invoke(context, null);
        assertEquals("AB: Hello A from B", r2.toString());
    }
    
    public void testInvokeWithSuperABReturnTypeNoParamTypes() {
        MethodExpression me3 = factory.createMethodExpression(context,

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    }
    
    public void testInvokeWithSuperABReturnTypeNoParamTypes() {
        MethodExpression me3 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanA,beanB)}", String.class , null);
        Object r3 = me3.invoke(context, null);
        assertEquals("AB: Hello A from B", r3.toString());
    }
    
    public void testInvokeWithSuperABNoReturnTypeParamTypes() {
        MethodExpression me4 = factory.createMethodExpression(context,

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    public void testInvokeWithSuperABNoReturnTypeParamTypes() {
        MethodExpression me4 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanA,beanB)}", null ,
                new Class<?>[] {TesterBeanA.class, TesterBeanB.class});
        Object r4 = me4.invoke(context, null);
        assertEquals("AB: Hello A from B", r4.toString());
    }
    
    public void testInvokeWithSuperABReturnTypeParamTypes() {
        MethodExpression me5 = factory.createMethodExpression(context,

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    public void testInvokeWithSuperABReturnTypeParamTypes() {
        MethodExpression me5 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanA,beanB)}", String.class ,
                new Class<?>[] {TesterBeanA.class, TesterBeanB.class});
        Object r5 = me5.invoke(context, null);
        assertEquals("AB: Hello A from B", r5.toString());
    }
    
    public void testInvokeWithSuperABB() {
        MethodExpression me6 = factory.createMethodExpression(context,

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    }
    
    public void testInvokeWithSuperABB() {
        MethodExpression me6 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanA,beanBB)}", null , null);
        Object r6 = me6.invoke(context, null);
        assertEquals("ABB: Hello A from BB", r6.toString());
    }
    
    public void testInvokeWithSuperABBB() {
        MethodExpression me7 = factory.createMethodExpression(context,

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    }
    
    public void testInvokeWithSuperABBB() {
        MethodExpression me7 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanA,beanBBB)}", null , null);
        Object r7 = me7.invoke(context, null);
        assertEquals("ABB: Hello A from BBB", r7.toString());
    }
    
    public void testInvokeWithSuperAAB() {
        MethodExpression me8 = factory.createMethodExpression(context,

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