org.glassfish.config.support.CrudResolver Maven / Gradle / Ivy
/*
* Copyright (c) 2009, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.config.support;
import org.jvnet.hk2.annotations.Optional;
import org.jvnet.hk2.annotations.Contract;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.config.ConfigBeanProxy;
import org.glassfish.api.admin.AdminCommandContext;
import jakarta.inject.Inject;
import jakarta.inject.Named;
/**
* A config resolver is responsible for finding the target object of a specified type on which a creation command
* invocation will be processed.
*
* Implementation of these interfaces can be injected with the command invocation parameters in order to determine which
* object should be returned
*
* @author Jerome Dochez
*/
@Contract
public interface CrudResolver {
/**
* Retrieves the existing configuration object a command invocation is intented to mutate.
*
* @param context the command invocation context
* @param type the type of the expected instance
* @return the instance or null if not found
*/
T resolve(AdminCommandContext context, Class type);
@Service
public static final class DefaultResolver implements CrudResolver {
@Inject
@Named("type")
@Optional
CrudResolver defaultResolver = null;
@Override
public T resolve(AdminCommandContext context, Class type) {
if (defaultResolver != null) {
return defaultResolver.resolve(context, type);
}
return null;
}
}
}