package org.apache.maven.plugin.surefire;

 /*

  * 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 java.io.IOException;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Set;

 import org.apache.maven.plugin.logging.Log;

 import org.apache.maven.plugin.surefire.booterclient.ProviderDetector;

 import org.apache.maven.surefire.providerapi.SurefireProvider;

 import org.apache.maven.surefire.util.NestedRuntimeException;

 import javax.annotation.Nonnull;

 /**

  * @author Kristian Rosenvold

  */

 public class ProviderList

 {

     private final ProviderInfo[] wellKnownProviders;

     private final ConfigurableProviderInfo dynamicProvider;

     public ProviderList( ConfigurableProviderInfo dynamicProviderInfo, ProviderInfo... wellKnownProviders )

     {

         this.wellKnownProviders = wellKnownProviders;

         this.dynamicProvider = dynamicProviderInfo;

     }

     public @Nonnull List<ProviderInfo> resolve( @Nonnull Log log )

     {

         List<ProviderInfo> providersToRun = new ArrayList<ProviderInfo>();

         Set<String> manuallyConfiguredProviders = getManuallyConfiguredProviders();

         if ( manuallyConfiguredProviders.size() > 0 )

         {

             for ( String name : manuallyConfiguredProviders )

             {

                 ProviderInfo wellKnown = findByName( name );

                 ProviderInfo providerToAdd = wellKnown != null ? wellKnown : dynamicProvider.instantiate( name );

                 log.info( "Using configured provider " + providerToAdd.getProviderName() );

                 providersToRun.add( providerToAdd );

             }

             return providersToRun;

         }

         return autoDetectOneProvider();

     }

     private @Nonnull List<ProviderInfo> autoDetectOneProvider()

     {

         List<ProviderInfo> providersToRun = new ArrayList<ProviderInfo>();

         for ( ProviderInfo wellKnownProvider : wellKnownProviders )

         {

             if ( wellKnownProvider.isApplicable() )

             {

                 providersToRun.add( wellKnownProvider );

                 return providersToRun;

             }

         }

         return providersToRun;

     }

     private Set<String> getManuallyConfiguredProviders()

     {

         try

         {

             return ProviderDetector.getServiceNames( SurefireProvider.class,

                                                      Thread.currentThread().getContextClassLoader() );

         }

         catch ( IOException e )

         {

             throw new NestedRuntimeException( e );

         }

     }

     private ProviderInfo findByName( String providerClassName )

     {

         for ( ProviderInfo wellKnownProvider : wellKnownProviders )

         {

             if ( wellKnownProvider.getProviderName().equals( providerClassName ) )

             {

                 return wellKnownProvider;

             }

         }

         return null;

     }

 }