/*
 * Copyright (C) 2009 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.checkState;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import com.google.inject.Key;
import com.google.inject.MembersInjector;
import com.google.inject.Provider;
import com.google.inject.TypeLiteral;
import com.google.inject.matcher.Matcher;
import com.google.inject.matcher.Matchers;
import com.google.inject.spi.InjectionListener;
import com.google.inject.spi.Message;
import com.google.inject.spi.TypeEncounter;
import java.lang.reflect.Method;
import java.util.List;

Author:jessewilson@google.com (Jesse Wilson)
/** @author jessewilson@google.com (Jesse Wilson) */
final class EncounterImpl<T> implements TypeEncounter<T> { private final Errors errors; private final Lookups lookups; private List<MembersInjector<? super T>> membersInjectors; // lazy private List<InjectionListener<? super T>> injectionListeners; // lazy /*if[AOP]*/ private List<MethodAspect> aspects; // lazy /*end[AOP]*/ private boolean valid = true; EncounterImpl(Errors errors, Lookups lookups) { this.errors = errors; this.lookups = lookups; } void invalidate() { valid = false; } /*if[AOP]*/ ImmutableList<MethodAspect> getAspects() { return aspects == null ? ImmutableList.<MethodAspect>of() : ImmutableList.copyOf(aspects); } @Override public void bindInterceptor( Matcher<? super Method> methodMatcher, org.aopalliance.intercept.MethodInterceptor... interceptors) { checkState(valid, "Encounters may not be used after hear() returns."); // make sure the applicable aspects is mutable if (aspects == null) { aspects = Lists.newArrayList(); } aspects.add(new MethodAspect(Matchers.any(), methodMatcher, interceptors)); } /*end[AOP]*/ ImmutableSet<MembersInjector<? super T>> getMembersInjectors() { return membersInjectors == null ? ImmutableSet.<MembersInjector<? super T>>of() : ImmutableSet.copyOf(membersInjectors); } ImmutableSet<InjectionListener<? super T>> getInjectionListeners() { return injectionListeners == null ? ImmutableSet.<InjectionListener<? super T>>of() : ImmutableSet.copyOf(injectionListeners); } @Override public void register(MembersInjector<? super T> membersInjector) { checkState(valid, "Encounters may not be used after hear() returns."); if (membersInjectors == null) { membersInjectors = Lists.newArrayList(); } membersInjectors.add(membersInjector); } @Override public void register(InjectionListener<? super T> injectionListener) { checkState(valid, "Encounters may not be used after hear() returns."); if (injectionListeners == null) { injectionListeners = Lists.newArrayList(); } injectionListeners.add(injectionListener); } @Override public void addError(String message, Object... arguments) { checkState(valid, "Encounters may not be used after hear() returns."); errors.addMessage(message, arguments); } @Override public void addError(Throwable t) { checkState(valid, "Encounters may not be used after hear() returns."); errors.errorInUserCode(t, "An exception was caught and reported. Message: %s", t.getMessage()); } @Override public void addError(Message message) { checkState(valid, "Encounters may not be used after hear() returns."); errors.addMessage(message); } @Override public <T> Provider<T> getProvider(Key<T> key) { checkState(valid, "Encounters may not be used after hear() returns."); return lookups.getProvider(key); } @Override public <T> Provider<T> getProvider(Class<T> type) { return getProvider(Key.get(type)); } @Override public <T> MembersInjector<T> getMembersInjector(TypeLiteral<T> typeLiteral) { checkState(valid, "Encounters may not be used after hear() returns."); return lookups.getMembersInjector(typeLiteral); } @Override public <T> MembersInjector<T> getMembersInjector(Class<T> type) { return getMembersInjector(TypeLiteral.get(type)); } }