package org.apache.onami.autobind.scanner;

 /*

  * 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 java.lang.System.getProperty;

 import static java.util.logging.Level.FINE;

 import static java.util.logging.Level.INFO;

 import static java.util.logging.Level.SEVERE;

 import static java.util.logging.Logger.getLogger;

 import java.io.IOException;

 import java.util.Set;

 import java.util.logging.Logger;

 import javax.inject.Inject;

 import org.apache.onami.autobind.annotations.Bind;

 import org.apache.onami.autobind.annotations.GuiceModule;

 import org.apache.onami.autobind.install.InstallationContext;

 import org.apache.onami.autobind.scanner.features.BindingScannerFeature;

 import org.apache.onami.autobind.scanner.features.ScannerFeature;

 import com.google.inject.Binder;

 import com.google.inject.Module;

 /**

  * The ScannerModule will be injected with a ClasspathScanner and the needed

  * Annotation Listeners will be added. The attached Listeners will install all

  * Modules annotated with {@link GuiceModule} and bind all Beans annotated with

  * {@link Bind}.

  */

 public class ScannerModule

     implements Module

 {

     private static String LINE_SEPARATOR = getProperty( "line.separator" );

     private final Logger _logger = getLogger( getClass().getName() );

     @Inject

     private ClasspathScanner _scanner;

     @Inject

     private Set<ScannerFeature> _listeners;

     @Inject

     private InstallationContext _context;

     @Override

     public void configure( Binder binder )

     {

         if ( _logger.isLoggable( INFO ) )

         {

             StringBuilder builder = new StringBuilder( _scanner.getClass().getName() )

                                     .append( " is using following Scanner Features: " )

                                     .append( LINE_SEPARATOR );

             for ( ScannerFeature listener : _listeners )

             {

                 builder.append( listener.getClass().getName() ).append( LINE_SEPARATOR );

             }

             _logger.log( INFO, builder.toString() );

         }

         for ( ScannerFeature listener : _listeners )

         {

             if ( listener instanceof BindingScannerFeature )

             {

                 ( (BindingScannerFeature) listener ).setBinder( binder );

                 if ( _logger.isLoggable( FINE ) )

                 {

                     _logger.fine( "Binding AnnotationListeners " + listener.getClass().getName() );

                 }

             }

         }

         try

         {

             _scanner.scan();

         }

         catch ( IOException e )

         {

             _logger.log( SEVERE, "Failure while Scanning the Classpath for Classes with Annotations.", e );

         }

         try

         {

             _context.process();

         }

         catch ( Exception e )

         {

             _logger.log( SEVERE, "Failure while executing the collected Tasks.", e );

         }

     }

 }