/**
* 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 org.elasticsearch.common.inject;
import org.elasticsearch.common.collect.ImmutableList;
import org.elasticsearch.common.collect.Lists;
import org.elasticsearch.common.inject.internal.Errors;
import org.elasticsearch.common.inject.internal.ErrorsException;
import org.elasticsearch.common.inject.internal.InternalContext;
import org.elasticsearch.common.inject.spi.InjectionPoint;
import org.elasticsearch.common.inject.spi.InjectionRequest;
import org.elasticsearch.common.inject.spi.StaticInjectionRequest;
import java.util.List;
import java.util.Set;
/**
* Handles {@link Binder#requestInjection} and {@link Binder#requestStaticInjection} commands.
*
* @author crazybob@google.com (Bob Lee)
* @author jessewilson@google.com (Jesse Wilson)
* @author mikeward@google.com (Mike Ward)
*/
class InjectionRequestProcessor extends AbstractProcessor {
private final List<StaticInjection> staticInjections = Lists.newArrayList();
private final Initializer initializer;
InjectionRequestProcessor(Errors errors, Initializer initializer) {
super(errors);
this.initializer = initializer;
}
@Override public Boolean visit(StaticInjectionRequest request) {
staticInjections.add(new StaticInjection(injector, request));
return true;
}
@Override public Boolean visit(InjectionRequest request) {
Set<InjectionPoint> injectionPoints;
try {
injectionPoints = request.getInjectionPoints();
} catch (ConfigurationException e) {
errors.merge(e.getErrorMessages());
injectionPoints = e.getPartialValue();
}
initializer.requestInjection(
injector, request.getInstance(), request.getSource(), injectionPoints);
return true;
}
public void validate() {
for (StaticInjection staticInjection : staticInjections) {
staticInjection.validate();
}
}
public void injectMembers() {
for (StaticInjection staticInjection : staticInjections) {
staticInjection.injectMembers();
}
}
/**
* A requested static injection.
*/
private class StaticInjection {
final InjectorImpl injector;
final Object source;
final StaticInjectionRequest request;
ImmutableList<SingleMemberInjector> memberInjectors;
public StaticInjection(InjectorImpl injector, StaticInjectionRequest request) {
this.injector = injector;
this.source = request.getSource();
this.request = request;
}
void validate() {
Errors errorsForMember = errors.withSource(source);
Set<InjectionPoint> injectionPoints;
try {
injectionPoints = request.getInjectionPoints();
} catch (ConfigurationException e) {
errors.merge(e.getErrorMessages());
injectionPoints = e.getPartialValue();
}
memberInjectors = injector.membersInjectorStore.getInjectors(
injectionPoints, errorsForMember);
}
void injectMembers() {
try {
injector.callInContext(new ContextualCallable<Void>() {
public Void call(InternalContext context) {
for (SingleMemberInjector injector : memberInjectors) {
injector.inject(errors, context, null);
}
return null;
}
});
} catch (ErrorsException e) {
throw new AssertionError();
}
}
}
}