src/com/google/inject/spi/Exposure.java

///**
// * Copyright (C) 2008 Google Inc.
// *
// * Licensed under the Apache License, Version 2.0 (the "License");
// * you may not use this file except in compliance with the License.
// * You may obtain a copy of the License at
// *
// * http://www.apache.org/licenses/LICENSE-2.0
// *
// * Unless required by applicable law or agreed to in writing, software
// * distributed under the License is distributed on an "AS IS" BASIS,
// * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// * See the License for the specific language governing permissions and
// * limitations under the License.
// */
//
//package com.google.inject.spi;
//
//import static com.google.common.base.Preconditions.checkNotNull;
//import com.google.inject.Binder;
//import com.google.inject.Key;
//import com.google.inject.binder.AnnotatedElementBuilder;
//import com.google.inject.internal.ModuleBinding;
//import java.lang.annotation.Annotation;
//
///**
// * Exposes a binding to its enclosing environment.
// *
// * @author jessewilson@google.com (Jesse Wilson)
// * @since 2.0
// */
//public final class Exposure implements Element {
//  private final Object source;
//  private final PrivateEnvironment privateEnvironment;
//  private Key<?> key;
//
//  Exposure(Object source, PrivateEnvironment privateEnvironment, Key<?> key) {
//    this.source = checkNotNull(source, "source");
//    this.privateEnvironment = privateEnvironment;
//    this.key = checkNotNull(key, "key");
//  }
//
//  public Object getSource() {
//    return source;
//  }
//
//  /**
//   * Returns the environment that owns this binding. Its enclosing environment gains access to the
//   * binding via this exposure.
//   */
//  public PrivateEnvironment getPrivateEnvironment() {
//    return privateEnvironment;
//  }
//
//  /**
//   * Returns the exposed key.
//   */
//  public Key<?> getKey() {
//    return key;
//  }
//
//  public <T> T acceptVisitor(ElementVisitor<T> visitor) {
//    return visitor.visitExposure(this);
//  }
//
//  /** Returns a builder that applies annotations to this exposed key. */
//  AnnotatedElementBuilder annotatedElementBuilder(final Binder binder) {
//    return new AnnotatedElementBuilder() {
//      public void annotatedWith(Class<? extends Annotation> annotationType) {
//        checkNotNull(annotationType, "annotationType");
//        checkNotAnnotated();
//        key = Key.get(key.getTypeLiteral(), annotationType);
//      }
//
//      public void annotatedWith(Annotation annotation) {
//        checkNotNull(annotation, "annotation");
//        checkNotAnnotated();
//        key = Key.get(key.getTypeLiteral(), annotation);
//      }
//
//      private void checkNotAnnotated() {
//        if (key.getAnnotationType() != null) {
//          binder.addError(ModuleBinding.ANNOTATION_ALREADY_SPECIFIED);
//        }
//      }
//    };
//  }
//}