package org.apache.maven.index.artifact;
   
   /*
    * 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 javax.inject.Named;
  import javax.inject.Singleton;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Properties;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A very simple artifact packaging mapper, that has everything for quick-start wired in this class. Also, it takes into
   * account the "${nexus-work}/conf/packaging2extension-mapping.properties" file into account if found. To override the
   * "defaults" in this class, simply add lines to properties file with same keys.
   *
   * @author cstamas
   */
  @Singleton
  @Named
  public class DefaultArtifactPackagingMapper
      implements ArtifactPackagingMapper
  {
  
      private final Logger logger = LoggerFactory.getLogger( getClass() );
  
      protected Logger getLogger()
      {
          return logger;
      }
  
      public static final String MAPPING_PROPERTIES_FILE = "packaging2extension-mapping.properties";
  
      private File propertiesFile;
  
      private volatile Map<String, String> packaging2extensionMapping;
  
      private static final Map<String, String> DEFAULTS;
  
      static
      {
          DEFAULTS = new HashMap<>();
          DEFAULTS.put( "ejb-client", "jar" );
          DEFAULTS.put( "ejb", "jar" );
          DEFAULTS.put( "rar", "jar" );
          DEFAULTS.put( "par", "jar" );
          DEFAULTS.put( "maven-plugin", "jar" );
          DEFAULTS.put( "maven-archetype", "jar" );
          DEFAULTS.put( "plexus-application", "jar" );
          DEFAULTS.put( "eclipse-plugin", "jar" );
          DEFAULTS.put( "eclipse-feature", "jar" );
          DEFAULTS.put( "eclipse-application", "zip" );
          DEFAULTS.put( "nexus-plugin", "jar" );
          DEFAULTS.put( "java-source", "jar" );
          DEFAULTS.put( "javadoc", "jar" );
          DEFAULTS.put( "test-jar", "jar" );
      }
  
      public void setPropertiesFile( File propertiesFile )
      {
          this.propertiesFile = propertiesFile;
          this.packaging2extensionMapping = null;
      }
  
      public Map<String, String> getPackaging2extensionMapping()
      {
          if ( packaging2extensionMapping == null )
          {
              synchronized ( this )
              {
                  if ( packaging2extensionMapping == null )
                  {
                      packaging2extensionMapping = new HashMap<>();
  
                      // merge defaults
                      packaging2extensionMapping.putAll( DEFAULTS );
  
                     if ( propertiesFile != null && propertiesFile.exists() )
                     {
                         getLogger().info( "Found user artifact packaging mapping file, applying it..." );
 
                         Properties userMappings = new Properties();
 
                         try ( FileInputStream fis = new FileInputStream( propertiesFile ) )
                         {
                             userMappings.load( fis );
 
                             if ( userMappings.keySet().size() > 0 )
                             {
                                 for ( Object key : userMappings.keySet() )
                                 {
                                     packaging2extensionMapping.put( key.toString(),
                                                                     userMappings.getProperty( key.toString() ) );
                                 }
 
                                 getLogger().info(
                                     propertiesFile.getAbsolutePath()
                                         + " user artifact packaging mapping file contained "
                                         + userMappings.keySet().size() + " mappings, applied them all succesfully." );
                             }
                         }
                         catch ( IOException e )
                         {
                             getLogger().warn(
                                 "Got IO exception during read of file: " + propertiesFile.getAbsolutePath() );
                         }
 
                     }
                     else
                     {
                         // make it silent if using defaults
                         getLogger().debug(
                             "User artifact packaging mappings file not found, will work with defaults..." );
                     }
                 }
             }
         }
 
         return packaging2extensionMapping;
     }
 
     public void setPackaging2extensionMapping( Map<String, String> packaging2extensionMapping )
     {
         this.packaging2extensionMapping = packaging2extensionMapping;
     }
 
     public Map<String, String> getDefaults()
     {
         return DEFAULTS;
     }
 
     public String getExtensionForPackaging( String packaging )
     {
         if ( packaging == null )
         {
             return "jar";
         }
 
         // default's to packaging name, ie. "jar", "war", "pom", etc.
         return getPackaging2extensionMapping().getOrDefault( packaging, packaging );
     }
 }