Examples of org.picocontainer.defaults.DefaultPicoContainer

org.picocontainer.defaults.DefaultPicoContainer

The Standard {@link PicoContainer}/ {@link MutablePicoContainer} implementation.Constructing a container c with a parent p container will cause c to look up components in p if they cannot be found inside c itself.

Using {@link Class} objects as keys to the various registerXXX() methods makesa subtle semantic difference:

If there are more than one registered components of the same type and one of them are registered with a {@link java.lang.Class} key of the corresponding type, this componentwill take precedence over other components during type resolution.

Another place where keys that are classes make a subtle difference is in {@link org.picocontainer.alternatives.ImplementationHidingComponentAdapter}.
@author Paul Hammant @author Aslak Hellesøy @author Jon Tirsén @author Thomas Heller @version $Revision: 1.8 $

            disposed = true;
        }
    }


    public void testLifecycleGuardIsEasyToCircumventSoItMightAsWellBeDeleted() {
        DefaultPicoContainer mpc = new DefaultPicoContainer();
        mpc.registerComponentImplementation(MyDisposable.class);
        ImmutablePicoContainer ipc = new ImmutablePicoContainer(mpc);
        List componentInstances = ipc.getComponentInstances();
        for (Iterator iterator = componentInstances.iterator(); iterator.hasNext();) {
            Object o = iterator.next();
            if(o instanceof Disposable) {

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        MyDisposable disposable = (MyDisposable ) ipc.getComponentInstance(MyDisposable.class);
        assertTrue(disposable.disposed);
    }


    public void testFacetiouslyThatLifeCycleGuardPreventsCyclingOfChildContainersAsComponentsAreNotTheOnlyThingsThatAreLifecycleable() {
        DefaultPicoContainer parent = new DefaultPicoContainer();
        MutablePicoContainer child = parent.makeChildContainer();
        parent.registerComponentImplementation("foo", MyDisposable.class);
        child.registerComponentImplementation("bar", MyDisposable.class);
        ImmutablePicoContainer ipc = new ImmutablePicoContainer(parent);
        try {
            ipc.dispose();
            fail("Should have barfed");
        } catch (UnsupportedOperationException e) {
            // expected
        }


        MyDisposable parentDisposable = (MyDisposable) parent.getComponentInstance("foo");
        assertFalse(parentDisposable.disposed);


        MyDisposable childDisposable = (MyDisposable) child.getComponentInstance("bar");
        assertFalse(childDisposable.disposed);

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        assertTrue(list1.contains("Hello"));
        assertFalse(list2.contains("Hello"));
    }


    public void testSwappingViaSwappableInterface() {
        MutablePicoContainer pico = new DefaultPicoContainer();
        pico.registerComponent(new HotSwappingComponentAdapter(new ConstructorInjectionComponentAdapter("l", ArrayList.class)));
        List l = (List) pico.getComponentInstance("l");
        l.add("Hello");
        final ArrayList newList = new ArrayList();
        ArrayList oldSubject = (ArrayList) ((Swappable) l).hotswap(newList);
        assertEquals("Hello", oldSubject.get(0));
        assertTrue(l.isEmpty());

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        // That despite breaking (marginally) backwards compatability.
        // - Paul
    }


    public void testVisitingOfImmutableContainerWorks() {
        DefaultPicoContainer pico = new DefaultPicoContainer();
        Object foo = new Object();
        ComponentAdapter componentAdapter = pico.registerComponentInstance(foo);


        Mock fooVisitor = new Mock(PicoVisitor.class);
        fooVisitor.expects(once()).method("visitContainer").with(eq(pico));
        fooVisitor.expects(once()).method("visitComponentAdapter").with(eq(componentAdapter));

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            return "TADA";
        }
    }


    public void testInterferingSwapMethodsInComponentMasksHotSwappingFunctionality() {
        MutablePicoContainer pico = new DefaultPicoContainer();
        pico.registerComponent(new HotSwappingComponentAdapter(new ConstructorInjectionComponentAdapter("os", OtherSwappableImpl.class)));
        OtherSwappable os = (OtherSwappable) pico.getComponentInstance("os");
        OtherSwappable os2 = new OtherSwappableImpl();


        assertEquals("TADA", os.hotswap(os2));
        Swappable os_ = (Swappable) os;
        assertEquals("TADA", os_.hotswap(os2));

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        }
    }


    // TODO: Fails with versions of cglib >= 2.0.1
    public void testShouldBeAbleToHandleMutualDependenciesWithoutInterfaceImplSeparation() {
        MutablePicoContainer pico = new DefaultPicoContainer(new CachingComponentAdapterFactory(new HotSwappingComponentAdapterFactory(new ConstructorInjectionComponentAdapterFactory(),
                new CglibProxyFactory())));


        pico.registerComponentImplementation(Yin.class);
        pico.registerComponentImplementation(Yang.class);


        Yin yin = (Yin) pico.getComponentInstance(Yin.class);
        Yang yang = (Yang) pico.getComponentInstance(Yang.class);


        assertSame(yin, yang.getYin());
        assertSame(yang, yin.getYang());
    }

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     *         necessary.
     */
    protected abstract ComponentAdapter prepDEF_verifyWithoutDependencyWorks(MutablePicoContainer picoContainer);


    final public void testDEF_verifyWithoutDependencyWorks() {
        final MutablePicoContainer picoContainer = new DefaultPicoContainer(createDefaultComponentAdapterFactory());
        final ComponentAdapter componentAdapter = prepDEF_verifyWithoutDependencyWorks(picoContainer);
        assertSame(getComponentAdapterType(), componentAdapter.getClass());
        componentAdapter.verify(picoContainer);
    }

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     *         is not necessary.
     */
    protected abstract ComponentAdapter prepDEF_verifyDoesNotInstantiate(MutablePicoContainer picoContainer);


    final public void testDEF_verifyDoesNotInstantiate() {
        final MutablePicoContainer picoContainer = new DefaultPicoContainer(createDefaultComponentAdapterFactory());
        final ComponentAdapter componentAdapter = prepDEF_verifyDoesNotInstantiate(picoContainer);
        assertSame(getComponentAdapterType(), componentAdapter.getClass());
        final ComponentAdapter notInstantiatablecomponentAdapter = new NotInstantiatableComponentAdapter(componentAdapter);
        final PicoContainer wrappedPicoContainer = wrapComponentInstances(NotInstantiatableComponentAdapter.class, picoContainer, null);
        notInstantiatablecomponentAdapter.verify(wrappedPicoContainer);

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    final public void testDEF_isAbleToTakeParameters() {
        final Class type = getComponentAdapterType();
        boolean hasParameters = supportsParameters(type);
        if (hasParameters) {
            final MutablePicoContainer picoContainer = new DefaultPicoContainer(createDefaultComponentAdapterFactory());
            final ComponentAdapter componentAdapter = prepDEF_isAbleToTakeParameters(picoContainer);
            assertSame(getComponentAdapterType(), componentAdapter.getClass());
            final RecordingVisitor visitor = new RecordingVisitor();
            visitor.traverse(componentAdapter);
            final List visitedElements = visitor.getVisitedElements();

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        throw new AssertionFailedError("You have to overwrite this method for a useful test");
    }


    final public void testSER_isSerializable() throws IOException, ClassNotFoundException {
        if ((getComponentAdapterNature() & SERIALIZABLE) > 0) {
            final MutablePicoContainer picoContainer = new DefaultPicoContainer(createDefaultComponentAdapterFactory());
            final ComponentAdapter componentAdapter = prepSER_isSerializable(picoContainer);
            assertSame(getComponentAdapterType(), componentAdapter.getClass());
            final Object instance = componentAdapter.getComponentInstance(picoContainer);
            assertNotNull(instance);
            final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

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