package org.apache.maven.plugin.registry;

 /*

  * 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.util.ArrayList;

 import java.util.Collections;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 public final class PluginRegistryUtils

 {

     private PluginRegistryUtils()

     {

         // don't allow construction.

     }

     public static void merge( PluginRegistry dominant, PluginRegistry recessive, String recessiveSourceLevel )

     {

         // nothing to merge...

         if ( dominant == null || recessive == null )

         {

             return;

         }

         RuntimeInfo dominantRtInfo = dominant.getRuntimeInfo();

         String dominantUpdateInterval = dominant.getUpdateInterval();

         if ( dominantUpdateInterval == null )

         {

             String recessiveUpdateInterval = recessive.getUpdateInterval();

             if ( recessiveUpdateInterval != null )

             {

                 dominant.setUpdateInterval( recessiveUpdateInterval );

                 dominantRtInfo.setUpdateIntervalSourceLevel( recessiveSourceLevel );

             }

         }

         String dominantAutoUpdate = dominant.getAutoUpdate();

         if ( dominantAutoUpdate == null )

         {

             String recessiveAutoUpdate = recessive.getAutoUpdate();

             if ( recessiveAutoUpdate != null )

             {

                 dominant.setAutoUpdate( recessiveAutoUpdate );

                 dominantRtInfo.setAutoUpdateSourceLevel( recessiveSourceLevel );

             }

         }

         List recessivePlugins = null;

         if ( recessive != null )

         {

             recessivePlugins = recessive.getPlugins();

         }

         else

         {

             recessivePlugins = Collections.EMPTY_LIST;

         }

         shallowMergePlugins( dominant, recessivePlugins, recessiveSourceLevel );

     }

     public static void recursivelySetSourceLevel( PluginRegistry pluginRegistry, String sourceLevel )

     {

         if ( pluginRegistry == null )

         {

             return;

         }

         pluginRegistry.setSourceLevel( sourceLevel );

         for ( Iterator it = pluginRegistry.getPlugins().iterator(); it.hasNext(); )

         {

             Plugin plugin = (Plugin) it.next();

             plugin.setSourceLevel( sourceLevel );

         }

     }

     private static void shallowMergePlugins( PluginRegistry dominant, List recessive, String recessiveSourceLevel )

     {

         Map dominantByKey = dominant.getPluginsByKey();

         List dominantPlugins = dominant.getPlugins();

         for ( Iterator it = recessive.iterator(); it.hasNext(); )

         {

             Plugin recessivePlugin = (Plugin) it.next();

             if ( !dominantByKey.containsKey( recessivePlugin.getKey() ) )

             {

                 recessivePlugin.setSourceLevel( recessiveSourceLevel );

                 dominantPlugins.add( recessivePlugin );

             }

         }

         dominant.flushPluginsByKey();

     }

     public static PluginRegistry extractUserPluginRegistry( PluginRegistry pluginRegistry )

     {

         PluginRegistry userRegistry = null;

         // check if this registry is entirely made up of global settings

         if ( pluginRegistry != null && !PluginRegistry.GLOBAL_LEVEL.equals( pluginRegistry.getSourceLevel() ) )

         {

             userRegistry = new PluginRegistry();

             RuntimeInfo rtInfo = new RuntimeInfo( userRegistry );

             userRegistry.setRuntimeInfo( rtInfo );

             RuntimeInfo oldRtInfo = pluginRegistry.getRuntimeInfo();

             if ( TrackableBase.USER_LEVEL.equals( oldRtInfo.getAutoUpdateSourceLevel() ) )

             {

                 userRegistry.setAutoUpdate( pluginRegistry.getAutoUpdate() );

             }

             if ( TrackableBase.USER_LEVEL.equals( oldRtInfo.getUpdateIntervalSourceLevel() ) )

             {

                 userRegistry.setUpdateInterval( pluginRegistry.getUpdateInterval() );

             }

             List plugins = new ArrayList();

             for ( Iterator it = pluginRegistry.getPlugins().iterator(); it.hasNext(); )

             {

                 Plugin plugin = (Plugin) it.next();

                 if ( TrackableBase.USER_LEVEL.equals( plugin.getSourceLevel() ) )

                 {

                     plugins.add( plugin );

                 }

             }

             userRegistry.setPlugins( plugins );

             rtInfo.setFile( pluginRegistry.getRuntimeInfo().getFile() );

         }

         return userRegistry;

     }

 }