Method configure

core/src/com/google/inject/util/Modules.java:212–357

()

    }

    @Override
    public void configure() {
      Binder baseBinder = binder();
      List<Element> baseElements = Elements.getElements(currentStage(), baseModules);

      // If the sole element was a PrivateElements, we want to override
      // the private elements within that -- so refocus our elements
      // and binder.
      if (baseElements.size() == 1) {
        Element element = Iterables.getOnlyElement(baseElements);
        if (element instanceof PrivateElements) {
          PrivateElements privateElements = (PrivateElements) element;
          PrivateBinder privateBinder =
              baseBinder.newPrivateBinder().withSource(privateElements.getSource());
          for (Key<?> exposed : privateElements.getExposedKeys()) {
            privateBinder.withSource(privateElements.getExposedSource(exposed)).expose(exposed);
          }
          baseBinder = privateBinder;
          baseElements = privateElements.getElements();
        }
      }

      final Binder binder = baseBinder.skipSources(this.getClass());
      final ImmutableSet<Element> elements = ImmutableSet.copyOf(baseElements);
      final Module scannersModule = extractScanners(elements);
      final List<Element> overrideElements =
          Elements.getElements(
              currentStage(),
              ImmutableList.<Module>builder().addAll(overrides).add(scannersModule).build());

      final Set<Key<?>> overriddenKeys = Sets.newHashSet();
      final Map<Class<? extends Annotation>, ScopeBinding> overridesScopeAnnotations =
          Maps.newHashMap();

      // execute the overrides module, keeping track of which keys and scopes are bound
      new ModuleWriter(binder) {
        @Override
        public <T> Void visit(Binding<T> binding) {
          overriddenKeys.add(binding.getKey());
          return super.visit(binding);
        }

        @Override
        public Void visit(ScopeBinding scopeBinding) {
          overridesScopeAnnotations.put(scopeBinding.getAnnotationType(), scopeBinding);
          return super.visit(scopeBinding);
        }

        @Override
        public Void visit(PrivateElements privateElements) {
          overriddenKeys.addAll(privateElements.getExposedKeys());
          return super.visit(privateElements);
        }
      }.writeAll(overrideElements);

      // execute the original module, skipping all scopes and overridden keys. We only skip each
      // overridden binding once so things still blow up if the module binds the same thing
      // multiple times.