Examples of org.apache.tapestry5.services.ComponentClassResolver

org.apache.tapestry5.services.ComponentClassResolver
Resolves page names and component types to fully qualified class names. Pages and components may be provided by the application or inside a mapped package. Page names often appear inside URLs, and component types often appear in component template (when specifying the type of an embedded component).
The service is configured using a collection of {@link LibraryMapping}s. Each mapping maps a prefix, such as "core" to a root package name, such as "org.apache.tapestry5.corelib". The root package is expected to have sub-packages: "pages", "components", "mixins" and "base" ("base" is for base classes).
The resolver performs a search of the classpath (via {@link ClassNameLocator}), to build up a set of case-insensitive maps from logical page name, component type, or mixin type to fully qualified class name.
Certain ambiguities occur if mapped packages overlap, either in terms of the the prefixes or the package names. Keep things clearly separate to avoid lookup problems.


        train_locateComponentClassNames(locator, LIB_ROOT_PACKAGE + ".pages", className);


        replay();


        ComponentClassResolver resolver = create(logger, locator, new LibraryMapping(LIB_PREFIX, LIB_ROOT_PACKAGE),
                new LibraryMapping(CORE_PREFIX, CORE_ROOT_PACKAGE));


        assertEquals(resolver.resolvePageNameToClassName("lib/MyLibPage"), className);


        verify();
    }

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        train_locateComponentClassNames(locator, LIB_ROOT_PACKAGE + ".pages", className);


        replay();


        ComponentClassResolver resolver = create(logger, locator, new LibraryMapping(LIB_PREFIX, LIB_ROOT_PACKAGE),
                new LibraryMapping(CORE_PREFIX, CORE_ROOT_PACKAGE));


        assertEquals(resolver.resolvePageNameToClassName("lib/Page"), className);


        verify();
    }

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        ClassNameLocator locator = newClassNameLocator();
        Logger logger = mockLogger();


        replay();


        ComponentClassResolver resolver = create(logger, locator, new LibraryMapping(CORE_PREFIX, CORE_ROOT_PACKAGE));


        String className = LIB_ROOT_PACKAGE + ".pages.LibPage";


        try
        {
            resolver.resolvePageClassNameToPageName(className);
            unreachable();
        } catch (IllegalArgumentException ex)
        {
            assertEquals(ex.getMessage(), "Unable to resolve class name " + className + " to a logical page name.");
        }

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        train_locateComponentClassNames(locator, APP_ROOT_PACKAGE + ".pages", APP_ROOT_PACKAGE + ".pages.Start");


        replay();


        ComponentClassResolver resolver = create(logger, locator, new LibraryMapping(CORE_PREFIX, CORE_ROOT_PACKAGE));


        try
        {
            resolver.canonicalizePageName("MissingPage");
            unreachable();
        } catch (UnknownValueException ex)
        {
            assertEquals(ex.getMessage(), "Unable to resolve 'MissingPage' to a known page name.");
        }

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        ClassNameLocator locator = newClassNameLocator();
        Logger logger = mockLogger();


        replay();


        ComponentClassResolver resolver = create(logger, locator, new LibraryMapping(CORE_PREFIX, CORE_ROOT_PACKAGE));


        String className = CORE_ROOT_PACKAGE + ".foo.CorePage";


        try
        {
            resolver.resolvePageClassNameToPageName(className);
            unreachable();
        } catch (IllegalArgumentException ex)
        {
            assertEquals(ex.getMessage(), "Unable to resolve class name " + className + " to a logical page name.");
        }

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        train_locateComponentClassNames(locator, secondaryLibPackage + ".pages", className);


        replay();


        ComponentClassResolver resolver = create(logger, locator, new LibraryMapping(LIB_PREFIX, LIB_ROOT_PACKAGE),
                new LibraryMapping(LIB_PREFIX, secondaryLibPackage), new LibraryMapping(CORE_PREFIX, CORE_ROOT_PACKAGE));


        assertEquals(resolver.resolvePageNameToClassName("lib/MyLibPage"), className);


        verify();
    }

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        train_locateComponentClassNames(locator, APP_ROOT_PACKAGE + ".components", className);


        replay();


        ComponentClassResolver resolver = create(logger, locator);


        assertEquals(resolver.resolveComponentTypeToClassName("SimpleComponent"), className);


        verify();
    }

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        train_locateComponentClassNames(locator, APP_ROOT_PACKAGE + ".mixins", expectedClassName);


        replay();


        ComponentClassResolver resolver = create(logger, locator);


        assertEquals(resolver.resolveMixinTypeToClassName("SimpleMixin"), expectedClassName);


        verify();
    }

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        ClassNameLocator locator = newClassNameLocator();
        Logger logger = mockLogger();


        replay();


        ComponentClassResolver resolver = create(logger, locator, new LibraryMapping(CORE_PREFIX, CORE_ROOT_PACKAGE));


        try
        {
            resolver.resolveMixinTypeToClassName("SimpleMixin");
            unreachable();
        } catch (UnknownValueException ex)
        {
            assertMessageContains(ex, "Unable to resolve 'SimpleMixin' to a mixin class name.");
        }

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        ClassNameLocator locator = newClassNameLocator();
        Logger logger = mockLogger();


        replay();


        ComponentClassResolver resolver = create(logger, locator, new LibraryMapping(CORE_PREFIX, CORE_ROOT_PACKAGE));


        try
        {
            resolver.resolveComponentTypeToClassName("SimpleComponent");
            unreachable();
        } catch (UnknownValueException ex)
        {
            assertTrue(ex.getMessage().contains("Unable to resolve 'SimpleComponent' to a component class name."));
        }

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