| /* |
| * Copyright (C) 2011 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 com.google.common.collect.ImmutableList; |
| import com.google.inject.Binder; |
| import com.google.inject.Binding; |
| import com.google.inject.matcher.Matcher; |
| import java.util.List; |
| |
| /** |
| * Binds keys (picked using a Matcher) to a provision listener. Listeners are created explicitly in |
| * a module using {@link Binder#bindListener(Matcher, ProvisionListener...)} statements: |
| * |
| * @author sameb@google.com (Sam Berlin) |
| * @since 4.0 |
| */ |
| public final class ProvisionListenerBinding implements Element { |
| |
| private final Object source; |
| private final Matcher<? super Binding<?>> bindingMatcher; |
| private final List<ProvisionListener> listeners; |
| |
| ProvisionListenerBinding( |
| Object source, Matcher<? super Binding<?>> bindingMatcher, ProvisionListener[] listeners) { |
| this.source = source; |
| this.bindingMatcher = bindingMatcher; |
| this.listeners = ImmutableList.copyOf(listeners); |
| } |
| |
| /** Returns the registered listeners. */ |
| public List<ProvisionListener> getListeners() { |
| return listeners; |
| } |
| |
| /** |
| * Returns the binding matcher which chooses which bindings the listener should be notified of. |
| */ |
| public Matcher<? super Binding<?>> getBindingMatcher() { |
| return bindingMatcher; |
| } |
| |
| @Override |
| public Object getSource() { |
| return source; |
| } |
| |
| @Override |
| public <R> R acceptVisitor(ElementVisitor<R> visitor) { |
| return visitor.visit(this); |
| } |
| |
| @Override |
| public void applyTo(Binder binder) { |
| binder |
| .withSource(getSource()) |
| .bindListener(bindingMatcher, listeners.toArray(new ProvisionListener[listeners.size()])); |
| } |
| } |