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    • io.airlift.jaxrs.JaxrsResourceConfig Maven / Gradle / Ivy

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    /*
 * Copyright 2010 Proofpoint, Inc.
 *
 * 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 io.airlift.jaxrs;

import com.google.common.collect.ImmutableMap;
import org.glassfish.jersey.internal.inject.AbstractBinder;
import org.glassfish.jersey.internal.inject.Binder;
import org.glassfish.jersey.internal.inject.Providers;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.server.model.Resource;

import java.util.Map;
import java.util.Set;

public class JaxrsResourceConfig
        extends ResourceConfig
{
    public JaxrsResourceConfig(Set singletons)
    {
        ImmutableMap.Builder, Object> builder = ImmutableMap.builder();
        for (Object singleton : singletons) {
            Class clazz = singleton.getClass();
            if (singleton instanceof Class clazzInstance) {
                register(clazzInstance);
            }
            else if (Providers.isProvider(clazz) || Binder.class.isAssignableFrom(clazz)) {
                // If Jersey supports this component's class (including Binders), register directly, so we can get @Context injections
                register(singleton);
            }
            else if (singleton instanceof Resource resource) {
                registerResources(resource);
            }
            else {
                builder.put(clazz, singleton);
            }
        }

        Map, Object> classToInstance = builder.buildOrThrow();
        registerClasses(classToInstance.keySet());
        register(new SingletonsBinderBridge(classToInstance));
    }

    // Allows HK2 to retrieve instances of registered singleton resources that we got from Guice
    private static class SingletonsBinderBridge
            extends AbstractBinder
    {
        private final Map, Object> singletons;

        public SingletonsBinderBridge(Map, Object> singletons)
        {
            this.singletons = ImmutableMap.copyOf(singletons);
        }

        @Override
        public void configure()
        {
            for (Map.Entry, Object> singleton : singletons.entrySet()) {
                bind(singleton.getValue()).to(singleton.getKey());
            }
        }
    }
}
    
    
    
    

    




    
    
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