/**
* 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.camel.guice.impl;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import com.google.common.base.Objects;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.spi.AnnotationProviderFactory;
import com.google.inject.spi.InjectionAnnotation;
import org.apache.camel.CamelContext;
import org.apache.camel.EndpointInject;
import org.apache.camel.impl.CamelPostProcessorHelper;
import org.apache.camel.util.ObjectHelper;
/**
* Injects values into the {@link EndpointInject} injection point
*
* @version $Revision: 724293 $
*/
@InjectionAnnotation(EndpointInject.class)
public class EndpointInjector extends CamelPostProcessorHelper implements AnnotationProviderFactory {
@Inject
public EndpointInjector(CamelContext camelContext) {
super(camelContext);
}
public Provider createProvider(final AnnotatedElement member) {
final EndpointInject inject = member.getAnnotation(EndpointInject.class);
Objects.nonNull(inject, "@EndpointInject is not present!");
final Class<?> type;
final String injectionPointName;
final String endpointRef = inject.name();
final String uri = inject.uri();
if (member instanceof Field) {
Field field = (Field) member;
type = field.getType();
injectionPointName = field.getName();
} else if (member instanceof Method) {
Method method = (Method) member;
Class<?>[] parameterTypes = method.getParameterTypes();
if (parameterTypes.length == 1) {
type = parameterTypes[0];
injectionPointName = ObjectHelper.getPropertyName(method);
} else {
throw new UnsupportedOperationException("Only a single method parameter value supported for @EndpointInject on " + method);
}
} else {
throw new UnsupportedOperationException("Annotated element " + member + " not supported");
}
return new Provider() {
public Object get() {
return getInjectionValue(type, uri, endpointRef, injectionPointName);
}
};
}
}