package org.apache.onami.autobind.scanner.features;

 /*

  * 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.

  */

 import static com.google.inject.multibindings.Multibinder.newSetBinder;

 import java.lang.annotation.Annotation;

 import org.apache.onami.autobind.scanner.ScannerModule;

 import com.google.inject.binder.ScopedBindingBuilder;

 import com.google.inject.multibindings.Multibinder;

 /**

  * Default Implementation for Annotation Listeners, which should stay informed

  * abbout found annotated classes. Due the fact, that we need the Binder of the

  * Child Injector, it will be set at runtime by the {@link ScannerModule}.

  */

 public abstract class MultiBindingScannerFeature

     extends BindingScannerFeature

 {

     protected <T, V extends T> void bindInstance( V impl, Class<T> interf, Annotation annotation,

                                                   Class<? extends Annotation> scope )

     {

         Multibinder<T> builder;

         synchronized ( _binder )

         {

             if ( annotation != null )

             {

                 builder = newSetBinder( _binder, interf, annotation );

             }

             else

             {

                 builder = newSetBinder( _binder, interf );

             }

             builder.addBinding().toInstance( impl );

         }

     }

     protected void bindConstant( String value, Annotation annotation )

     {

         Multibinder<String> builder;

         synchronized ( _binder )

         {

             builder = newSetBinder( _binder, String.class, annotation );

             builder.addBinding().toInstance( value );

         }

     }

     protected <T, V extends T> void bind( Class<V> impl, Class<T> interf, Annotation annotation,

                                           Class<? extends Annotation> scope )

     {

         Multibinder<T> builder;

         synchronized ( _binder )

         {

             if ( annotation != null )

             {

                 builder = newSetBinder( _binder, interf, annotation );

             }

             else

             {

                 builder = newSetBinder( _binder, interf );

             }

             ScopedBindingBuilder scopedBindingBuilder = builder.addBinding().to( impl );

             if ( scope != null )

             {

                 scopedBindingBuilder.in( scope );

             }

         }

     }

 }