org.jboss.weld.bootstrap.api.helpers.ServiceRegistries Maven / Gradle / Ivy

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 * JBoss, Home of Professional Open Source
 * Copyright 2010, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.jboss.weld.bootstrap.api.helpers;

import org.jboss.weld.bootstrap.api.Service;
import org.jboss.weld.bootstrap.api.ServiceRegistry;

/**
 * Utility class for {@link ServiceRegistry}
 */
public class ServiceRegistries {

    private ServiceRegistries() {
    }

    /**
     * Returns an unmodifiable version of provided {@link ServiceRegistry} where any attempt to add a service results in an
     * exception
     *
     * @param serviceRegistry service registry to process
     * @return unmodifiable variant
     */
    public static ServiceRegistry unmodifiableServiceRegistry(final ServiceRegistry serviceRegistry) {
        return new ForwardingServiceRegistry() {

            public  void add(java.lang.Class type, S service) {
                throw new UnsupportedOperationException("This service registry is unmodifiable");
            }

            @Override
            protected ServiceRegistry delegate() {
                return serviceRegistry;
            }

        };
    }

}