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 void testInvokeWithVarArgsAABB() throws Exception {
        MethodExpression me5 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanAA,beanBB,beanBB)}", null , null);
        Object r5 = me5.invoke(context, null);
        assertEquals("ABB[]: Hello AA from BB, BB", r5.toString());
    }
    
    public void testInvokeWithVarArgsAABBB() throws Exception {
        MethodExpression me6 = factory.createMethodExpression(context,

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    }
    
    public void testInvokeWithVarArgsAABBB() throws Exception {
        MethodExpression me6 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanAA,beanBBB,beanBBB)}", null , null);
        Object r6 = me6.invoke(context, null);
        assertEquals("ABB[]: Hello AA from BBB, BBB", r6.toString());
    }
    
    public void testInvokeWithVarArgsAAAB() throws Exception {
        MethodExpression me7 = factory.createMethodExpression(context,

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    public void testInvokeWithVarArgsAAAB() throws Exception {
        MethodExpression me7 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanAAA,beanB,beanB)}", null , null);
        Exception e = null;
        try {
            me7.invoke(context, null);
        } catch (Exception e1) {
            e = e1;
        }
        // Expected to fail
        assertNotNull(e);

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    }
    
    public void testInvokeWithVarArgsAAABB() throws Exception {
        MethodExpression me8 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanAAA,beanBB,beanBB)}", null , null);
        Object r8 = me8.invoke(context, null);
        assertEquals("ABB[]: Hello AAA from BB, BB", r8.toString());
    }
    
    public void testInvokeWithVarArgsAAABBB() throws Exception {
        MethodExpression me9 = factory.createMethodExpression(context,

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    }
    
    public void testInvokeWithVarArgsAAABBB() throws Exception {
        MethodExpression me9 = factory.createMethodExpression(context,
                "${beanC.sayHello(beanAAA,beanBBB,beanBBB)}", null , null);
        Object r9 = me9.invoke(context, null);
        assertEquals("ABB[]: Hello AAA from BBB, BBB", r9.toString());
    }
    
    /*
     * This is also tested implicitly in numerous places elsewhere in this

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    public void testBug49655() throws Exception {
        // This is the call the failed
        MethodExpression me = factory.createMethodExpression(context,
                "#{beanA.setName('New value')}", null, null);
        // The rest is to check it worked correctly
        me.invoke(context, null);
        ValueExpression ve = factory.createValueExpression(context,
                "#{beanA.name}", java.lang.String.class);
        assertEquals("New value", ve.getValue(context));
    }

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    }
    
    public void testBugPrimitives() throws Exception {
        MethodExpression me = factory.createMethodExpression(context,
                "${beanA.setValLong(5)}", null, null);
        me.invoke(context, null);
        ValueExpression ve = factory.createValueExpression(context,
                "#{beanA.valLong}", java.lang.String.class);
        assertEquals("5", ve.getValue(context));
    }

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    }
    
    public void testBug50449a() throws Exception {
        MethodExpression me1 = factory.createMethodExpression(context,
                "${beanB.sayHello()}", null, null);
        String actual = (String) me1.invoke(context, null);
        assertEquals("Hello from B", actual);
    }


    public void testBug50449b() throws Exception {
        MethodExpression me1 = factory.createMethodExpression(context,

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    }


    public void testBug50449b() throws Exception {
        MethodExpression me1 = factory.createMethodExpression(context,
                "${beanB.sayHello('Tomcat')}", null, null);
        String actual = (String) me1.invoke(context, null);
        assertEquals("Hello Tomcat from B", actual);
    }
}

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    public Object invoke(ELContext context, Object[] params)
    {
        MethodExpression me = getMethodExpression(context);
        if (me != null)
        {        
            return me.invoke(context, params);
        }
        return null;
    }


    @Override

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