Method forMultibindsMethod

java/dagger/internal/codegen/KeyFactory.java:198–212

Returns the key for a Multibinds @Multibinds method. The key's type is either Set or Map >, where F is either Provider or Producer, depending on bindingType.

(
      BindingType bindingType, ExecutableType executableType, ExecutableElement method)

   * {@link Provider} or {@link Producer}, depending on {@code bindingType}.
   */
  Key forMultibindsMethod(
      BindingType bindingType, ExecutableType executableType, ExecutableElement method) {
    checkArgument(method.getKind().equals(METHOD), "%s must be a method", method);
    TypeElement factoryType =
        elements.getTypeElement(bindingType.frameworkClass().getCanonicalName());
    TypeMirror returnType = executableType.getReturnType();
    TypeMirror keyType =
        MapType.isMap(returnType)
            ? mapOfFrameworkType(
                MapType.from(returnType).keyType(),
                factoryType,
                MapType.from(returnType).valueType())
            : returnType;
    return forMethod(method, keyType);
  }

  private TypeMirror bindingMethodKeyType(
      TypeMirror returnType,