/**
* 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.internal;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.inject.Binding;
import com.google.inject.Key;
import com.google.inject.Scope;
import com.google.inject.TypeLiteral;
import com.google.inject.spi.ProvisionListenerBinding;
import com.google.inject.spi.ScopeBinding;
import com.google.inject.spi.TypeConverterBinding;
import com.google.inject.spi.TypeListenerBinding;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* @author jessewilson@google.com (Jesse Wilson)
*/
final class InheritingState implements State {
private final State parent;
// Must be a linked hashmap in order to preserve order of bindings in Modules.
private final Map<Key<?>, Binding<?>> explicitBindingsMutable = Maps.newLinkedHashMap();
private final Map<Key<?>, Binding<?>> explicitBindings
= Collections.unmodifiableMap(explicitBindingsMutable);
private final Map<Class<? extends Annotation>, ScopeBinding> scopes = Maps.newHashMap();
private final List<TypeConverterBinding> converters = Lists.newArrayList();
/*if[AOP]*/
private final List<MethodAspect> methodAspects = Lists.newArrayList();
/*end[AOP]*/
private final List<TypeListenerBinding> typeListenerBindings = Lists.newArrayList();
private final List<ProvisionListenerBinding> provisionListenerBindings = Lists.newArrayList();
private final WeakKeySet blacklistedKeys;
private final Object lock;
private final Object singletonCreationLock;
InheritingState(State parent) {
this.parent = checkNotNull(parent, "parent");
this.lock = (parent == State.NONE) ? this : parent.lock();
this.singletonCreationLock =
(parent == State.NONE) ? new Object() : parent.singletonCreationLock();
this.blacklistedKeys = new WeakKeySet(lock);
}
public State parent() {
return parent;
}
@SuppressWarnings("unchecked") // we only put in BindingImpls that match their key types
public <T> BindingImpl<T> getExplicitBinding(Key<T> key) {
Binding<?> binding = explicitBindings.get(key);
return binding != null ? (BindingImpl<T>) binding : parent.getExplicitBinding(key);
}
public Map<Key<?>, Binding<?>> getExplicitBindingsThisLevel() {
return explicitBindings;
}
public void putBinding(Key<?> key, BindingImpl<?> binding) {
explicitBindingsMutable.put(key, binding);
}
public ScopeBinding getScopeBinding(Class<? extends Annotation> annotationType) {
ScopeBinding scopeBinding = scopes.get(annotationType);
return scopeBinding != null ? scopeBinding : parent.getScopeBinding(annotationType);
}
public void putScopeBinding(Class<? extends Annotation> annotationType, ScopeBinding scope) {
scopes.put(annotationType, scope);
}
public Iterable<TypeConverterBinding> getConvertersThisLevel() {
return converters;
}
public void addConverter(TypeConverterBinding typeConverterBinding) {
converters.add(typeConverterBinding);
}
public TypeConverterBinding getConverter(
String stringValue, TypeLiteral<?> type, Errors errors, Object source) {
TypeConverterBinding matchingConverter = null;
for (State s = this; s != State.NONE; s = s.parent()) {
for (TypeConverterBinding converter : s.getConvertersThisLevel()) {
if (converter.getTypeMatcher().matches(type)) {
if (matchingConverter != null) {
errors.ambiguousTypeConversion(stringValue, source, type, matchingConverter, converter);
}
matchingConverter = converter;
}
}
}
return matchingConverter;
}
/*if[AOP]*/
public void addMethodAspect(MethodAspect methodAspect) {
methodAspects.add(methodAspect);
}
public ImmutableList<MethodAspect> getMethodAspects() {
return new ImmutableList.Builder<MethodAspect>()
.addAll(parent.getMethodAspects())
.addAll(methodAspects)
.build();
}
/*end[AOP]*/
public void addTypeListener(TypeListenerBinding listenerBinding) {
typeListenerBindings.add(listenerBinding);
}
public List<TypeListenerBinding> getTypeListenerBindings() {
List<TypeListenerBinding> parentBindings = parent.getTypeListenerBindings();
List<TypeListenerBinding> result
= new ArrayList<TypeListenerBinding>(parentBindings.size() + 1);
result.addAll(parentBindings);
result.addAll(typeListenerBindings);
return result;
}
public void addProvisionListener(ProvisionListenerBinding listenerBinding) {
provisionListenerBindings.add(listenerBinding);
}
public List<ProvisionListenerBinding> getProvisionListenerBindings() {
List<ProvisionListenerBinding> parentBindings = parent.getProvisionListenerBindings();
List<ProvisionListenerBinding> result
= new ArrayList<ProvisionListenerBinding>(parentBindings.size() + 1);
result.addAll(parentBindings);
result.addAll(provisionListenerBindings);
return result;
}
public void blacklist(Key<?> key, State state, Object source) {
parent.blacklist(key, state, source);
blacklistedKeys.add(key, state, source);
}
public boolean isBlacklisted(Key<?> key) {
return blacklistedKeys.contains(key);
}
public Set<Object> getSourcesForBlacklistedKey(Key<?> key) {
return blacklistedKeys.getSources(key);
}
public Object lock() {
return lock;
}
public Object singletonCreationLock() {
return singletonCreationLock;
}
public Map<Class<? extends Annotation>, Scope> getScopes() {
ImmutableMap.Builder<Class<? extends Annotation>, Scope> builder = ImmutableMap.builder();
for (Map.Entry<Class<? extends Annotation>, ScopeBinding> entry : scopes.entrySet()) {
builder.put(entry.getKey(), entry.getValue().getScope());
}
return builder.build();
}
}