editor.ParseExceptionIntellisense Maven / Gradle / Ivy

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package editor;

import gw.lang.parser.exceptions.ParseException;

import java.util.ArrayList;
import java.util.List;
import java.util.WeakHashMap;

/**
 */
public class ParseExceptionIntellisense
{
  private static final ParseExceptionIntellisense INSTANCE = new ParseExceptionIntellisense();

  private static final WeakHashMap> HANDLERS_BY_EDITOR = new WeakHashMap>();

  private static final List> HANDLER_TYPES =
    new ArrayList>();

  static
  {
    HANDLER_TYPES.add( BooleanValueCompletion.class );
    HANDLER_TYPES.add( NumberValueCompletion.class );
    HANDLER_TYPES.add( EnumerationValueCompletion.class );
    HANDLER_TYPES.add( StringValueCompletion.class );
  }

  public static ParseExceptionIntellisense instance()
  {
    return INSTANCE;
  }

  private ParseExceptionIntellisense()
  {
  }

  public void resolve( GosuEditor gsEditor, ParseException pe )
  {
    List handlers = getHandlers( gsEditor );
    for( IParseExceptionResolver handler : handlers )
    {
      if( handler.canResolve( pe ) )
      {
        handler.resolve( pe );
        break;
      }
    }
  }

  public boolean canResolve( GosuEditor gsEditor, ParseException pe )
  {
    List handlers = getHandlers( gsEditor );
    for( IParseExceptionResolver handler : handlers )
    {
      if( handler.canResolve( pe ) )
      {
        return true;
      }
    }
    return false;
  }

  private List getHandlers( GosuEditor gsEditor )
  {
    List handlers = HANDLERS_BY_EDITOR.get( gsEditor );
    if( handlers == null )
    {
      handlers = initHandlers( gsEditor );
    }
    return handlers;
  }

  private List initHandlers( GosuEditor gsEditor )
  {
    List handlers = new ArrayList( HANDLER_TYPES.size() );
    for( Class type : HANDLER_TYPES )
    {
      try
      {
        IParseExceptionResolver handler = type.newInstance();
        handlers.add( handler );
        handler.setGosuEditor( gsEditor );
      }
      catch( Exception e )
      {
        throw new RuntimeException( e );
      }
    }
    HANDLERS_BY_EDITOR.put( gsEditor, handlers );
    return handlers;
  }
}