Examples of javax.faces.el.VariableResolver

javax.faces.el.VariableResolver

VariableResolver represents a pluggable mechanism for resolving a top-level variable reference at evaluation time.
@deprecated This has been replaced by {@link javax.el.ELResolver}when operating with a null base argument.

     * @param associate our ApplicationAssociate
     */
    private static void addVariableResolvers(CompositeELResolver target,
                                             ApplicationAssociate associate) {


        VariableResolver vr = getDelegateVR(associate, false);
        if (vr != null) {
            target.add(new VariableResolverChainWrapper(vr));
        }


    }

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        }
    }


    public void installProgrammaticallyAddedResolvers() {
        // Ensure custom resolvers are inserted at the correct place.
        VariableResolver vr = this.getLegacyVariableResolver();
        if (null != vr) {
            assert(null != this.getLegacyVRChainHeadWrapperForJsp());
            this.getLegacyVRChainHeadWrapperForJsp().setWrapped(vr);
            assert(null != this.getLegacyVRChainHeadWrapperForFaces());
            this.getLegacyVRChainHeadWrapperForFaces().setWrapped(vr);

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                   (propertyResolver1 == propertyResolver3));


        // 4. Verify "getVariableResolver" returns the same VariableResolver
        //    instance if called multiple times.
        //
        VariableResolver variableResolver1 = application.getVariableResolver();
        VariableResolver variableResolver2 = application.getVariableResolver();
        VariableResolver variableResolver3 = application.getVariableResolver();
        assertTrue((variableResolver1 == variableResolver2) &&
                   (variableResolver1 == variableResolver3));


        // 5. Verify "getStateManager" returns the same StateManager
        //    instance if called multiple times.

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        application = (ApplicationImpl) aFactory.getApplication();


        ActionListener actionListener = null;
        NavigationHandler navHandler = null;
        PropertyResolver propResolver = null;
        VariableResolver varResolver = null;
        ViewHandler viewHandler = null;
        StateManager stateManager = null;


        assertTrue(null != (actionListener =
                            application.getActionListener()));

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    public void testScopedLookup() {
        TestBean testBean = new TestBean();
        InnerBean newInner, oldInner = new InnerBean();
        testBean.setInner(oldInner);
        VariableResolver variableResolver = 
            getFacesContext().getApplication().getVariableResolver();
        Object result = null;
        getFacesContext().getExternalContext().getSessionMap().remove(
            "TestBean");


        //
        // Get tests
        //


        // application
        getFacesContext().getExternalContext().getApplicationMap().put(
            "TestBean",
            testBean);
        result = variableResolver.resolveVariable(getFacesContext(),
                                                  "TestBean");
        assertTrue(result == testBean);
        getFacesContext().getExternalContext().getApplicationMap().remove(
            "TestBean");
        // session
        getFacesContext().getExternalContext().getSessionMap().put("TestBean",
                                                                   testBean);
        result = variableResolver.resolveVariable(getFacesContext(),
                                                  "TestBean");
        assertTrue(result == testBean);
        getFacesContext().getExternalContext().getSessionMap().remove(
            "TestBean");


        // session
        getFacesContext().getExternalContext().getRequestMap().put("TestBean",
                                                                   testBean);


        result = variableResolver.resolveVariable(getFacesContext(),
                                                  "TestBean");
        assertTrue(result == testBean);
        getFacesContext().getExternalContext().getRequestMap().remove(
            "TestBean");

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    }




    public void testImplicitObjects() {
        VariableResolver variableResolver = 
            getFacesContext().getApplication().getVariableResolver();
        Object result = null;


        //
        // test scope maps
        //


        // ApplicationMap
        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "applicationScope") ==
                   getFacesContext().getExternalContext().getApplicationMap());


        // SessionMap
        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "sessionScope") ==
                   getFacesContext().getExternalContext().getSessionMap());


        // RequestMap
        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "requestScope") ==
                   getFacesContext().getExternalContext().getRequestMap());


        //
        // test request objects
        //


        // cookie
        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "cookie") ==
                   getFacesContext().getExternalContext().getRequestCookieMap());


        // header
        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "header") ==
                   getFacesContext().getExternalContext().getRequestHeaderMap());


        // headerValues
        assertTrue(
            variableResolver.resolveVariable(getFacesContext(),
                                             "headerValues") ==
            getFacesContext().getExternalContext().getRequestHeaderValuesMap());


        // parameter
        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "param") ==
                   getFacesContext().getExternalContext()
                   .getRequestParameterMap());


        // parameterValues
        assertTrue(
            variableResolver.resolveVariable(getFacesContext(),
                                             "paramValues") ==
            getFacesContext().getExternalContext()
            .getRequestParameterValuesMap());


        //
        // misc
        //


        // initParameter
        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "initParam") ==
                   getFacesContext().getExternalContext().getInitParameterMap());




        // facesContext
        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "facesContext") ==
                   getFacesContext());


        // tree
        // create a dummy root for the tree.
        UIViewRoot page = Util.getViewHandler(getFacesContext()).createView(getFacesContext(), null);
        page.setId("root");
        page.setViewId("newTree");
        page.setLocale(Locale.US);
        getFacesContext().setViewRoot(page);


        assertTrue(variableResolver.resolveVariable(getFacesContext(),
                                                    "view") ==
                   getFacesContext().getViewRoot());




    }

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    }




    // Negative tests (should throw exceptions)
    public void testNegative() throws Exception {
        VariableResolver variableResolver = 
            getFacesContext().getApplication().getVariableResolver();


        Object value = null;


        // ---------- NullPointerException Returns ----------


        try {
            value = variableResolver.resolveVariable(getFacesContext(), null);
             fail("Should have thrown NullPointerException");
        } catch (NullPointerException e) {
            ; // Expected result
        } 
        
        try {
            value = variableResolver.resolveVariable(null, "foo");
            fail("Should have thrown NullPointerException");
        } catch (NullPointerException e) {
            ; // Expected result
        } 


        try {
            value = variableResolver.resolveVariable(null, null);
            fail("Should have thrown NullPointerException");
        } catch (NullPointerException e) {
            ; // Expected result
        }

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        ApplicationImpl application = (ApplicationImpl) aFactory.getApplication();
        ApplicationAssociate associate = ApplicationAssociate.getCurrentInstance();
        BeanManager manager = associate.getBeanManager();
        manager.register(beanInfo);


        VariableResolver variableResolver = application.getVariableResolver();


        Object result = variableResolver.resolveVariable(getFacesContext(),
                                                         beanName);


        assertTrue(result instanceof TestBean);
    }

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     */
    @SuppressWarnings("deprecation")
    public static VariableResolver getDelegateVR(ApplicationAssociate associate,
                                                 boolean provideDefault) {


        VariableResolver vr = associate.getLegacyVariableResolver();
        if (vr == null) {
            vr = associate.getLegacyVRChainHead();
            if (vr == null && provideDefault) {
                vr = new ChainAwareVariableResolver();
            }

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     */
    @SuppressWarnings("deprecation")
    private static void addVariableResolvers(CompositeELResolver target,
                                             ApplicationAssociate associate) {


        VariableResolver vr = getDelegateVR(associate, false);
        if (vr != null) {
            target.add(new VariableResolverChainWrapper(vr));
        }


    }

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