/*
 * Copyright (C) 2007 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.internal;

import com.google.common.base.Objects;
import com.google.inject.Binder;
import com.google.inject.Key;
import com.google.inject.spi.BindingTargetVisitor;
import com.google.inject.spi.Dependency;
import com.google.inject.spi.UntargettedBinding;

final class UntargettedBindingImpl<T> extends BindingImpl<T> implements UntargettedBinding<T> {

  UntargettedBindingImpl(InjectorImpl injector, Key<T> key, Object source) {
    super(injector, key, source, new InternalFactory<T>() {
      public T get(Errors errors, InternalContext context, Dependency<?> dependency, boolean linked) {
        throw new AssertionError();
      }
    }, Scoping.UNSCOPED);
  }

  public UntargettedBindingImpl(Object source, Key<T> key, Scoping scoping) {
    super(source, key, scoping);
  }

  public <V> V acceptTargetVisitor(BindingTargetVisitor<? super T, V> visitor) {
    return visitor.visit(this);
  }

  public BindingImpl<T> withScoping(Scoping scoping) {
    return new UntargettedBindingImpl<T>(getSource(), getKey(), scoping);
  }

  public BindingImpl<T> withKey(Key<T> key) {
    return new UntargettedBindingImpl<T>(getSource(), key, getScoping());
  }

  public void applyTo(Binder binder) {
    getScoping().applyTo(binder.withSource(getSource()).bind(getKey()));
  }

  @Override public String toString() {
    return Objects.toStringHelper(UntargettedBinding.class)
        .add("key", getKey())
        .add("source", getSource())
        .toString();
  }

  @Override
  public boolean equals(Object obj) {
    if(obj instanceof UntargettedBindingImpl) {
      UntargettedBindingImpl<?> o = (UntargettedBindingImpl<?>)obj;
      return getKey().equals(o.getKey())
        && getScoping().equals(o.getScoping());
    } else {
      return false;
    }
  }

  @Override
  public int hashCode() {
    return Objects.hashCode(getKey(), getScoping());
  }
}
