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.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.Enumeration;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.LinkedHashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Properties;
  import java.util.Set;
  
  import org.apache.maven.surefire.booter.Classpath;
  import org.apache.maven.surefire.booter.KeyValueSource;
  import org.apache.maven.surefire.util.internal.StringUtils;
  
  /**
   * A properties implementation that preserves insertion order.
   */
  public class SurefireProperties
      extends Properties
      implements KeyValueSource
  {
      private final LinkedHashSet<Object> items = new LinkedHashSet<Object>();
  
      public SurefireProperties()
      {
      }
  
      public SurefireProperties( Properties source )
      {
          if ( source != null )
          {
              this.putAll( source );
          }
      }
  
      public SurefireProperties( KeyValueSource source )
      {
          if ( source != null )
          {
              source.copyTo( this );
          }
      }
  
      @Override
      public synchronized Object put( Object key, Object value )
      {
          items.add( key );
          return super.put( key, value );
      }
  
      @Override
      public synchronized Object remove( Object key )
      {
          items.remove( key );
          return super.remove( key );
      }
  
      @Override
      public synchronized void clear()
      {
          items.clear();
          super.clear();
      }
  
      public synchronized Enumeration<Object> keys()
      {
          return Collections.enumeration( items );
      }
  
      public void copyPropertiesFrom( Properties source )
      {
          if ( source != null )
          {
             //noinspection unchecked
             for ( Object key : source.keySet() )
             {
                 Object value = source.get( key );
                 put( key, value );
             }
         }
     }
 
     public Iterable<Object> getStringKeySet()
     {
 
         //noinspection unchecked
         return keySet();
     }
 
     private static final Set<String> KEYS_THAT_CANNOT_BE_USED_AS_SYSTEM_PROPERTIES = new HashSet<String>(
                     Arrays.asList( "java.library.path", "file.encoding", "jdk.map.althashing.threshold" ) );
 
     public Set<Object> propertiesThatCannotBeSetASystemProperties()
     {
         Set<Object> result = new HashSet<Object>();
         for ( Object key : getStringKeySet() )
         {
             if ( KEYS_THAT_CANNOT_BE_USED_AS_SYSTEM_PROPERTIES.contains( key ) )
             {
                 result.add( key );
             }
         }
         return result;
     }
 
 
     public void copyToSystemProperties()
     {
 
         //noinspection unchecked
         for ( Object o : items )
         {
             String key = (String) o;
             String value = getProperty( key );
 
             System.setProperty( key, value );
         }
     }
 
     static SurefireProperties calculateEffectiveProperties( Properties systemProperties,
                                                             Map<String, String> systemPropertyVariables,
                                                             Properties userProperties, SurefireProperties props )
     {
         SurefireProperties result = new SurefireProperties();
         result.copyPropertiesFrom( systemProperties );
 
         result.copyPropertiesFrom( props );
 
         copyProperties( result, systemPropertyVariables );
         copyProperties( result, systemPropertyVariables );
 
         // We used to take all of our system properties and dump them in with the
         // user specified properties for SUREFIRE-121, causing SUREFIRE-491.
         // Not gonna do THAT any more... instead, we only propagate those system properties
         // that have been explicitly specified by the user via -Dkey=value on the CLI
 
         result.copyPropertiesFrom( userProperties );
         return result;
     }
 
     public static void copyProperties( Properties target, Map<String, String> source )
     {
         if ( source != null )
         {
             for ( String key : source.keySet() )
             {
                 String value = source.get( key );
                 target.setProperty( key, value == null ? "" : value );
             }
         }
     }
 
     public void copyTo( Map target )
     {
         Iterator iter = keySet().iterator();
         Object key;
         while ( iter.hasNext() )
         {
             key = iter.next();
             //noinspection unchecked
             target.put( key, get( key ) );
         }
     }
 
     public void setProperty( String key, File file )
     {
         if ( file != null )
         {
             setProperty( key, file.toString() );
         }
     }
 
     public void setProperty( String key, Boolean aBoolean )
     {
         if ( aBoolean != null )
         {
             setProperty( key, aBoolean.toString() );
         }
     }
 
     public void addList( List items, String propertyPrefix )
     {
         if ( items == null || items.size() == 0 )
         {
             return;
         }
         int i = 0;
         for ( Object item : items )
         {
             if ( item == null )
             {
                 throw new NullPointerException( propertyPrefix + i + " has null value" );
             }
 
             String[] stringArray = StringUtils.split( item.toString(), "," );
 
             for ( String aStringArray : stringArray )
             {
                 setProperty( propertyPrefix + i, aStringArray );
                 i++;
             }
 
         }
     }
 
     public void setClasspath( String prefix, Classpath classpath )
     {
         List classpathElements = classpath.getClassPath();
         for ( int i = 0; i < classpathElements.size(); ++i )
         {
             String element = (String) classpathElements.get( i );
             setProperty( prefix + i, element );
         }
     }
 
     private static SurefireProperties loadProperties( InputStream inStream )
         throws IOException
     {
         Properties p = new Properties();
 
         try
         {
             p.load( inStream );
         }
         finally
         {
             close( inStream );
         }
 
         return new SurefireProperties( p );
     }
 
     public static SurefireProperties loadProperties( File file )
         throws IOException
     {
         if ( file != null )
         {
             return loadProperties( new FileInputStream( file ) );
         }
 
         return new SurefireProperties();
     }
 
     private static void close( InputStream inputStream )
     {
         if ( inputStream == null )
         {
             return;
         }
 
         try
         {
             inputStream.close();
         }
         catch ( IOException ex )
         {
             // ignore
         }
     }
 
     public void setNullableProperty( String key, String value )
     {
         if ( value != null )
         {
             super.setProperty( key, value );
         }
 
     }
 
 
 }