/**
* 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;
import com.google.inject.internal.Errors;
import com.google.inject.spi.Element;
import com.google.inject.spi.ElementVisitor;
import com.google.inject.spi.InjectionRequest;
import com.google.inject.spi.InterceptorBinding;
import com.google.inject.spi.Message;
import com.google.inject.spi.PrivateElements;
import com.google.inject.spi.ProviderLookup;
import com.google.inject.spi.ScopeBinding;
import com.google.inject.spi.StaticInjectionRequest;
import com.google.inject.spi.TypeConverterBinding;
import java.util.Iterator;
import java.util.List;
/**
* Abstract base class for creating an injector from module elements.
*
* <p>Extending classes must return {@code true} from any overridden
* {@code visit*()} methods, in order for the element processor to remove the
* handled element.
*
* @author jessewilson@google.com (Jesse Wilson)
*/
abstract class AbstractProcessor implements ElementVisitor<Boolean> {
protected Errors errors;
protected InjectorImpl injector;
protected AbstractProcessor(Errors errors) {
this.errors = errors;
}
public void process(Iterable<InjectorShell> isolatedInjectorBuilders) {
for (InjectorShell injectorShell : isolatedInjectorBuilders) {
process(injectorShell.getInjector(), injectorShell.getElements());
}
}
public void process(InjectorImpl injector, List<Element> elements) {
Errors errorsAnyElement = this.errors;
this.injector = injector;
try {
for (Iterator<Element> i = elements.iterator(); i.hasNext(); ) {
Element element = i.next();
this.errors = errorsAnyElement.withSource(element.getSource());
Boolean allDone = element.acceptVisitor(this);
if (allDone) {
i.remove();
}
}
} finally {
this.errors = errorsAnyElement;
this.injector = null;
}
}
public Boolean visitMessage(Message message) {
return false;
}
public Boolean visitInterceptorBinding(InterceptorBinding interceptorBinding) {
return false;
}
public Boolean visitScopeBinding(ScopeBinding scopeBinding) {
return false;
}
public Boolean visitInjectionRequest(InjectionRequest injectionRequest) {
return false;
}
public Boolean visitStaticInjectionRequest(StaticInjectionRequest staticInjectionRequest) {
return false;
}
public Boolean visitTypeConverterBinding(TypeConverterBinding typeConverterBinding) {
return false;
}
public <T> Boolean visitBinding(Binding<T> binding) {
return false;
}
public <T> Boolean visitProviderLookup(ProviderLookup<T> providerLookup) {
return false;
}
public Boolean visitPrivateElements(PrivateElements privateElements) {
return false;
}
}