public HQLQueryPlan(String hql,
    boolean shallow,
    Map enabledFilters,
    SessionFactoryImplementor factory) 
{
	         
		this( hql, null, shallow, enabledFilters, factory );
}

 protected HQLQueryPlan(String hql,
    String collectionRole,
    boolean shallow,
    Map enabledFilters,
    SessionFactoryImplementor factory) 
{
		this.sourceQuery = hql;
		this.shallow = shallow;
		Set copy = new HashSet();
		copy.addAll( enabledFilters.keySet() );
		this.enabledFilterNames = java.util.Collections.unmodifiableSet( copy );
		Set combinedQuerySpaces = new HashSet();
		String[] concreteQueryStrings = QuerySplitter.concreteQueries( hql, factory );
		final int length = concreteQueryStrings.length;
		translators = new QueryTranslator[length];
		List sqlStringList = new ArrayList();
		for ( int i=0; i< length; i++ ) {
			if ( collectionRole == null ) {
				translators[i] = factory.getSettings()
						.getQueryTranslatorFactory()
						.createQueryTranslator( hql, concreteQueryStrings[i], enabledFilters, factory );
				translators[i].compile( factory.getSettings().getQuerySubstitutions(), shallow );
			}
			else {
				translators[i] = factory.getSettings()
						.getQueryTranslatorFactory()
						.createFilterTranslator( hql, concreteQueryStrings[i], enabledFilters, factory );
				( ( FilterTranslator ) translators[i] ).compile( collectionRole, factory.getSettings().getQuerySubstitutions(), shallow );
			}
			combinedQuerySpaces.addAll( translators[i].getQuerySpaces() );
			sqlStringList.addAll( translators[i].collectSqlStrings() );
		}
		this.sqlStrings = ArrayHelper.toStringArray( sqlStringList );
		this.querySpaces = combinedQuerySpaces;
		if ( length == 0 ) {
			parameterMetadata = new ParameterMetadata( null, null );
			returnMetadata = null;
		}
		else {
			this.parameterMetadata = buildParameterMetadata( translators[0].getParameterTranslations(), hql );
			if ( translators[0].isManipulationStatement() ) {
				returnMetadata = null;
			}
			else {
				if ( length  > 1 ) {
					final int returns = translators[0].getReturnTypes().length;
					returnMetadata = new ReturnMetadata( translators[0].getReturnAliases(), new Type[returns] );
				}
				else {
					returnMetadata = new ReturnMetadata( translators[0].getReturnAliases(), translators[0].getReturnTypes() );
				}
			}
		}
}

 public Set getEnabledFilterNames() 
{
		return enabledFilterNames;
}

 public ParameterMetadata getParameterMetadata() 
{
		return parameterMetadata;
}

 public Set getQuerySpaces() 
{
		return querySpaces;
}

 public ReturnMetadata getReturnMetadata() 
{
		return returnMetadata;
}

 public String getSourceQuery() 
{
		return sourceQuery;
}

 public String[] getSqlStrings() 
{
		return sqlStrings;
}

 public QueryTranslator[] getTranslators() 
{
		QueryTranslator[] copy = new QueryTranslator[translators.length];
		System.arraycopy(translators, 0, copy, 0, copy.length);
		return copy;
}

 public Set getUtilizedFilterNames() 
{
		// TODO : add this info to the translator and aggregate it here...
		return null;
}

 public boolean isShallow() 
{
		return shallow;
}

 public int performExecuteUpdate(QueryParameters queryParameters,
    SessionImplementor session) throws HibernateException 
{
		if ( log.isTraceEnabled() ) {
			log.trace( "executeUpdate: " + getSourceQuery() );
			queryParameters.traceParameters( session.getFactory() );
		}
		if ( translators.length != 1 ) {
			log.warn( "manipulation query [" + getSourceQuery() + "] resulted in [" + translators.length + "] split queries" );
		}
		int result = 0;
		for ( int i = 0; i <  translators.length; i++ ) {
			result += translators[i].executeUpdate( queryParameters, session );
		}
		return result;
}

 public Iterator performIterate(QueryParameters queryParameters,
    EventSource session) throws HibernateException 
{
		if ( log.isTraceEnabled() ) {
			log.trace( "iterate: " + getSourceQuery() );
			queryParameters.traceParameters( session.getFactory() );
		}
		if ( translators.length == 0 ) {
			return EmptyIterator.INSTANCE;
		}
		Iterator[] results = null;
		boolean many = translators.length  > 1;
		if (many) {
			results = new Iterator[translators.length];
		}
		Iterator result = null;
		for ( int i = 0; i <  translators.length; i++ ) {
			result = translators[i].iterate( queryParameters, session );
			if (many) results[i] = result;
		}
		return many ? new JoinedIterator(results) : result;
}

 public List performList(QueryParameters queryParameters,
    SessionImplementor session) throws HibernateException 
{
		if ( log.isTraceEnabled() ) {
			log.trace( "find: " + getSourceQuery() );
			queryParameters.traceParameters( session.getFactory() );
		}
		boolean hasLimit = queryParameters.getRowSelection() != null &&
		                   queryParameters.getRowSelection().definesLimits();
		boolean needsLimit = hasLimit && translators.length  > 1;
		QueryParameters queryParametersToUse;
		if ( needsLimit ) {
			log.warn( "firstResult/maxResults specified on polymorphic query; applying in memory!" );
			RowSelection selection = new RowSelection();
			selection.setFetchSize( queryParameters.getRowSelection().getFetchSize() );
			selection.setTimeout( queryParameters.getRowSelection().getTimeout() );
			queryParametersToUse = queryParameters.createCopyUsing( selection );
		}
		else {
			queryParametersToUse = queryParameters;
		}
		List combinedResults = new ArrayList();
		IdentitySet distinction = new IdentitySet();
		int includedCount = -1;
		translator_loop: for ( int i = 0; i <  translators.length; i++ ) {
			List tmp = translators[i].list( session, queryParametersToUse );
			if ( needsLimit ) {
				// NOTE : firstRow is zero-based
				int first = queryParameters.getRowSelection().getFirstRow() == null
				            ? 0
			                : queryParameters.getRowSelection().getFirstRow().intValue();
				int max = queryParameters.getRowSelection().getMaxRows() == null
				            ? -1
			                : queryParameters.getRowSelection().getMaxRows().intValue();
				final int size = tmp.size();
				for ( int x = 0; x <  size; x++ ) {
					final Object result = tmp.get( x );
					if ( distinction.add( result ) ) {
						continue;
					}
					includedCount++;
					if ( includedCount <  first ) {
						continue;
					}
					combinedResults.add( result );
					if ( max  >= 0 && includedCount  > max ) {
						// break the outer loop !!!
						break translator_loop;
					}
				}
			}
			else {
				combinedResults.addAll( tmp );
			}
		}
		return combinedResults;
}

 public ScrollableResults performScroll(QueryParameters queryParameters,
    SessionImplementor session) throws HibernateException 
{
		if ( log.isTraceEnabled() ) {
			log.trace( "iterate: " + getSourceQuery() );
			queryParameters.traceParameters( session.getFactory() );
		}
		if ( translators.length != 1 ) {
			throw new QueryException( "implicit polymorphism not supported for scroll() queries" );
		}
		if ( queryParameters.getRowSelection().definesLimits() && translators[0].containsCollectionFetches() ) {
			throw new QueryException( "firstResult/maxResults not supported in conjunction with scroll() of a query containing collection fetches" );
		}
		return translators[0].scroll( queryParameters, session );
}