| /** |
| * 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.grapher; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Sets; |
| import com.google.inject.Binding; |
| import com.google.inject.Key; |
| import com.google.inject.spi.ConstructorBinding; |
| import com.google.inject.spi.ConvertedConstantBinding; |
| import com.google.inject.spi.DefaultBindingTargetVisitor; |
| import com.google.inject.spi.Dependency; |
| import com.google.inject.spi.HasDependencies; |
| import com.google.inject.spi.InstanceBinding; |
| import com.google.inject.spi.LinkedKeyBinding; |
| import com.google.inject.spi.ProviderBinding; |
| import com.google.inject.spi.ProviderInstanceBinding; |
| import com.google.inject.spi.ProviderKeyBinding; |
| |
| import java.util.Collection; |
| import java.util.Set; |
| |
| /** |
| * {@link BindingTargetVisitor} that returns a {@link Collection} of the |
| * {@link Key}s of each {@link Binding}'s dependencies. Used by |
| * {@link InjectorGrapher} to walk the dependency graph from a starting set of |
| * {@link Binding}s. |
| * |
| * @author phopkins@gmail.com (Pete Hopkins) |
| */ |
| public class TransitiveDependencyVisitor |
| extends DefaultBindingTargetVisitor<Object, Collection<Key<?>>> { |
| |
| private Collection<Key<?>> visitHasDependencies(HasDependencies hasDependencies) { |
| Set<Key<?>> dependencies = Sets.newHashSet(); |
| |
| for (Dependency<?> dependency : hasDependencies.getDependencies()) { |
| dependencies.add(dependency.getKey()); |
| } |
| |
| return dependencies; |
| } |
| |
| @Override public Collection<Key<?>> visit(ConstructorBinding<?> binding) { |
| return visitHasDependencies(binding); |
| } |
| |
| @Override public Collection<Key<?>> visit(ConvertedConstantBinding<?> binding) { |
| return visitHasDependencies(binding); |
| } |
| |
| @Override public Collection<Key<?>> visit(InstanceBinding<?> binding) { |
| return visitHasDependencies(binding); |
| } |
| |
| @Override public Collection<Key<?>> visit(LinkedKeyBinding<?> binding) { |
| return ImmutableSet.<Key<?>>of(binding.getLinkedKey()); |
| } |
| |
| @Override public Collection<Key<?>> visit(ProviderBinding<?> binding) { |
| return ImmutableSet.<Key<?>>of(binding.getProvidedKey()); |
| } |
| |
| @Override public Collection<Key<?>> visit(ProviderInstanceBinding<?> binding) { |
| return visitHasDependencies(binding); |
| } |
| |
| @Override public Collection<Key<?>> visit(ProviderKeyBinding<?> binding) { |
| return ImmutableSet.<Key<?>>of(binding.getProviderKey()); |
| } |
| |
| @Override public Collection<Key<?>> visitOther(Binding<?> binding) { |
| return ImmutableSet.of(); |
| } |
| } |