/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.wink.guice.server.internal.lifecycle;
import java.io.IOException;
import java.security.PrivilegedActionException;
import org.apache.wink.common.internal.i18n.Messages;
import org.apache.wink.common.internal.lifecycle.CreationUtils;
import org.apache.wink.common.internal.lifecycle.ObjectCreationException;
import org.apache.wink.common.internal.registry.metadata.ClassMetadata;
import org.apache.wink.common.internal.registry.metadata.ProviderMetadataCollector;
import org.apache.wink.common.internal.registry.metadata.ResourceMetadataCollector;
import org.apache.wink.common.internal.runtime.RuntimeContextTLS;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.inject.AbstractModule;
import com.google.inject.MembersInjector;
import com.google.inject.TypeLiteral;
import com.google.inject.matcher.Matchers;
import com.google.inject.spi.TypeEncounter;
import com.google.inject.spi.TypeListener;
public class WinkGuiceModule extends AbstractModule {
@Override
protected void configure() {
bindListener(Matchers.any(), new TypeListener() {
public <I> void hear(TypeLiteral<I> typeLiteral, TypeEncounter<I> encounter) {
ClassMetadata classMetaData = collectClassMetadata(typeLiteral.getRawType());
if (classMetaData == null) {
return;
}
if (classMetaData.getInjectableFields().size() > 0) {
encounter.register(new JAXRSInjector<I>(classMetaData));
}
}
});
}
static class JAXRSInjector<T> implements MembersInjector<T> {
private final Logger logger = LoggerFactory.getLogger(JAXRSInjector.class);
private final ClassMetadata classMetaData;
public JAXRSInjector(ClassMetadata classMetaData) {
this.classMetaData = classMetaData;
}
public void injectMembers(T instance) {
try {
CreationUtils.injectFields(instance, classMetaData, RuntimeContextTLS
.getRuntimeContext());
} catch (IOException e) {
if (logger.isErrorEnabled()) {
logger.error(Messages.getMessage("injectionFailureSingleton", instance
.getClass().getName()));
}
throw new ObjectCreationException(e);
} catch (PrivilegedActionException e) {
if (logger.isErrorEnabled()) {
logger.error(Messages.getMessage("injectionFailureSingleton", instance
.getClass().getName()));
}
throw new ObjectCreationException(e);
}
}
}
private static <T> ClassMetadata collectClassMetadata(final Class<T> cls) {
ClassMetadata classMetadata = null;
if (ProviderMetadataCollector.isProvider(cls)) {
classMetadata = ProviderMetadataCollector.collectMetadata(cls);
} else if (ResourceMetadataCollector.isResource(cls)) {
classMetadata = ResourceMetadataCollector.collectMetadata(cls);
}
return classMetadata;
}
}