/*
* Sonatype Nexus (TM) Open Source Version
* Copyright (c) 2007-2014 Sonatype, Inc.
* All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions.
*
* This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0,
* which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks
* of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the
* Eclipse Foundation. All other trademarks are the property of their respective owners.
*/
package org.sonatype.nexus.client.rest.jersey;
import java.lang.reflect.Method;
import java.util.Map;
import javax.inject.Named;
import javax.inject.Singleton;
import javax.ws.rs.Path;
import org.sonatype.nexus.client.core.spi.SubsystemProvider;
import org.sonatype.sisu.siesta.client.ClientBuilder.Target.Factory;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* A {@link SubsystemProvider} that automatically creates implementation of Siesta based subsystems.
* A Siesta based subsystem is an interface with at least one method, interface or any of extended interfaces is
* annotated with {@link Path}.
*
* @since 2.7
*/
@Named
@Singleton
public class SiestaClientSubsystemProvider
implements SubsystemProvider
{
/**
* Creates an implementation of specified type if type is an interface and at least on method, the interface or any
* of extended interfaces are annotated with {@link Path}.
*/
@Override
public Object get(final Class type, final Map<Object, Object> context) {
checkNotNull(type, "type cannot be null");
checkNotNull(context, "context cannot be null");
if (!type.isInterface()) {
return null;
}
final Factory factory = (Factory) context.get(Factory.class);
if (factory == null) {
return null;
}
if (hasPathAnnotation(type)) {
return factory.build(type);
}
for (final Method method : type.getMethods()) {
if (method.getAnnotation(Path.class) != null) {
return factory.build(type);
}
}
return null;
}
private boolean hasPathAnnotation(final Class type) {
if (type.getAnnotation(Path.class) != null) {
return true;
}
for (final Class extended : type.getInterfaces()) {
if (hasPathAnnotation(extended)) {
return true;
}
}
return false;
}
}