Package org.apache.tapestry.ioc.services

Examples of org.apache.tapestry.ioc.services.ClassFab

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    public void new_class_with_name_and_base_class() throws Exception
    {
        ClassFactory factory = new ClassFactoryImpl();
        String name = ClassFabUtils.generateClassName(Runnable.class);

        ClassFab cf = factory.newClass(name, Object.class);
        cf.addInterface(Runnable.class);

        addRunMethod(cf);

        Class newClass = cf.createClass();

        Runnable instance = (Runnable) newClass.newInstance();

        instance.run();
    }
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    public void new_class_with_non_object_base_class() throws Exception
    {
        ClassFactory factory = new ClassFactoryImpl();
        String name = ClassFabUtils.generateClassName(Runnable.class);

        ClassFab cf = factory.newClass(name, BaseClass.class);
        cf.addInterface(Runnable.class);

        Class newClass = cf.createClass();

        Runnable instance = (Runnable) newClass.newInstance();

        instance.run();
    }
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    @Test
    public void new_class_with_interface() throws Exception
    {
        ClassFactory factory = new ClassFactoryImpl();

        ClassFab cf = factory.newClass(Runnable.class);

        addRunMethod(cf);

        Class newClass = cf.createClass();

        Runnable instance = (Runnable) newClass.newInstance();

        instance.run();
    }
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        }
    }

    private Class buildProxyClass(Class serviceType)
    {
        ClassFab classFab = _classFactory.newClass(serviceType);

        classFab.addField("_environment", Environment.class);
        classFab.addField("_serviceType", Class.class);

        classFab.addConstructor(new Class[]
        { Environment.class, Class.class }, null, "{ _environment = $1; _serviceType = $2; }");

        classFab.addMethod(Modifier.PRIVATE, new MethodSignature(serviceType, "_delegate", null,
                null), "return ($r) _environment.peekRequired(_serviceType); ");

        classFab.proxyMethodsToDelegate(serviceType, "_delegate()", format(
                "<EnvironmentalProxy for %s>",
                serviceType.getName()));

        return classFab.createClass();
    }
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     */
    private PropertyConduit build(Class rootClass, String expression)
    {
        String name = ClassFabUtils.generateClassName("PropertyConduit");

        ClassFab classFab = _classFactory.newClass(name, BasePropertyConduit.class);

        classFab.addConstructor(new Class[]
        { Class.class, AnnotationProvider.class, String.class }, null, "super($$);");

        String[] terms = expression.split("\\.");

        final Method readMethod = buildGetter(rootClass, classFab, expression, terms);
        final Method writeMethod = buildSetter(rootClass, classFab, expression, terms);

        // A conduit is either readable or writable, otherwise there will already have been
        // an error about unknown method name or property name.

        Class propertyType = readMethod != null ? readMethod.getReturnType() : writeMethod
                .getParameterTypes()[0];

        String description = String.format(
                "PropertyConduit[%s %s]",
                rootClass.getName(),
                expression);

        Class conduitClass = classFab.createClass();

        AnnotationProvider provider = new AnnotationProvider()
        {

            public <T extends Annotation> T getAnnotation(Class<T> annotationClass)
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                    propertyName,
                    sourceClass,
                    adapter.getType(),
                    propertyType));

        ClassFab cf = _classFactory.newClass(propertyType);

        cf.addField("_source", Modifier.PRIVATE | Modifier.FINAL, sourceClass);

        cf.addConstructor(new Class[]
        { sourceClass }, null, "_source = $1;");

        String body = format("return _source.%s();", adapter.getReadMethod().getName());

        MethodSignature sig = new MethodSignature(propertyType, "_delegate", null, null);
        cf.addMethod(Modifier.PRIVATE, sig, body);

        String toString = format("<Shadow: property %s of %s>", propertyName, source);

        cf.proxyMethodsToDelegate(propertyType, "_delegate()", toString);

        Class shadowClass = cf.createClass();

        try
        {
            Constructor cc = shadowClass.getConstructors()[0];
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        return serviceInterface.cast(interceptor);
    }

    private Class createInterceptorClass(Class serviceInterface, String serviceId)
    {
        ClassFab cf = _classFactory.newClass(serviceInterface);

        cf.addField("_delegate", Modifier.PRIVATE | Modifier.FINAL, serviceInterface);
        cf.addField("_logger", Modifier.PRIVATE | Modifier.FINAL, ServiceLogger.class);

        cf.addConstructor(new Class[]
        { serviceInterface, ServiceLogger.class }, null, "{ _delegate = $1; _logger = $2; }");

        addMethods(cf, serviceInterface, serviceId);

        return cf.createClass();
    }
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        }
    }

    private Class createProxyClass(String serviceId, Class serviceInterface, String proxyDescription)
    {
        ClassFab cf = _registry.newClass(serviceInterface);

        cf.addField("_creator", Modifier.PRIVATE | Modifier.FINAL, ObjectCreator.class);

        cf.addConstructor(new Class[]
        { ObjectCreator.class }, null, "_creator = $1;");

        addDelegateGetter(cf, serviceInterface, serviceId);

        cf.proxyMethodsToDelegate(serviceInterface, "_delegate()", proxyDescription);

        return cf.createClass();
    }
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        }
    }

    private Class createImplClass(Class interfaceClass)
    {
        ClassFab cf = _classFactory.newClass(interfaceClass);

        String interfaceClassName = interfaceClass.getName();

        cf.addField("_registry", Modifier.PRIVATE | Modifier.FINAL, StrategyRegistry.class);
        cf.addConstructor(new Class[]
        { StrategyRegistry.class }, null, "_registry = $1;");

        BodyBuilder builder = new BodyBuilder();

        MethodIterator mi = new MethodIterator(interfaceClass);

        while (mi.hasNext())
        {
            MethodSignature sig = mi.next();

            // TODO: Checks for methods that don't have at least one parameter, or don't have a
            // compatible 1st parameter. Currently, we'll get a Javassist exception.

            builder.clear();
            builder.begin();

            builder.addln("Object selector = $1;");
            builder.addln(
                    "%s adapter = (%<s) _registry.getByInstance(selector);",
                    interfaceClassName);
            builder.addln("return ($r) adapter.%s($$);", sig.getName());

            builder.end();

            cf.addMethod(Modifier.PUBLIC, sig, builder.toString());

        }

        if (!mi.getToString())
            cf.addToString(String.format("<Strategy for %s>", interfaceClassName));

        return cf.createClass();
    }
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    private Class createProxyClass(ServiceResources resources)
    {
        Class serviceInterface = resources.getServiceInterface();

        ClassFab cf = _classFactory.newClass(serviceInterface);

        cf.addField("_creator", Modifier.PRIVATE | Modifier.FINAL, ObjectCreator.class);

        // Constructor takes a ServiceCreator

        cf.addConstructor(new Class[]
        { ObjectCreator.class }, null, "_creator = $1;");

        String body = format("return (%s) _creator.createObject();", serviceInterface.getName());

        MethodSignature sig = new MethodSignature(serviceInterface, PER_THREAD_METHOD_NAME, null,
                null);

        cf.addMethod(Modifier.PRIVATE, sig, body);

        String toString = format(
                "<PerThread Proxy for %s(%s)>",
                resources.getServiceId(),
                serviceInterface.getName());

        cf.proxyMethodsToDelegate(serviceInterface, PER_THREAD_METHOD_NAME + "()", toString);

        return cf.createClass();
    }
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Related Classes of org.apache.tapestry.ioc.services.ClassFab

  • org.apache.tapestry.internal.bindings.PropBindingFactory
  • org.apache.tapestry.internal.services.EnvironmentalShadowBuilderImpl
  • org.apache.tapestry.internal.services.InternalClassTransformationImpl
  • org.apache.tapestry.internal.services.PropertyConduitSourceImpl
  • org.apache.tapestry.internal.services.PropertyConduitSourceImplTest
  • org.apache.tapestry.ioc.internal.ModuleImpl
  • org.apache.tapestry.ioc.internal.services.ChainBuilderImpl
  • org.apache.tapestry.ioc.internal.services.ClassFabImplTest
  • org.apache.tapestry.ioc.internal.services.ClassFactoryImpl
  • org.apache.tapestry.ioc.internal.services.ClassFactoryImplTest
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