public IQueryTranslator[] CreateQueryTranslators(string queryString, string collectionRole, bool shallow, IDictionary<string, IFilter> filters, ISessionFactoryImplementor factory)
{
var ast = new HqlParseEngine(queryString, collectionRole != null, factory).Parse();
return CreateQueryTranslators(ast, queryString, collectionRole, shallow,
filters, factory);
}
public IQueryTranslator[] CreateQueryTranslators(string queryString, string collectionRole, bool shallow, IDictionary <string, IFilter> filters, ISessionFactoryImplementor factory)
{
var ast = new HqlParseEngine(queryString, collectionRole != null, factory).Parse();
return(CreateQueryTranslators(ast, queryString, collectionRole, shallow,
filters, factory));
}
private HqlParseEngine Parse(bool isFilter)
{
if (_parser == null)
{
_parser = new HqlParseEngine(_hql, isFilter, _factory);
_parser.Parse();
}
return(_parser);
}
private HqlSqlTranslator Analyze(HqlParseEngine parser, string collectionRole)
{
var translator = new HqlSqlTranslator(parser.Ast, parser.Tokens, this, _factory, tokenReplacements,
collectionRole);
translator.Translate();
return(translator);
}
/// <summary>
/// Creates a new AST-based query translator.
/// </summary>
/// <param name="queryIdentifier">The query-identifier (used in stats collection)</param>
/// <param name="queryExpression">The hql query to translate</param>
/// <param name="enabledFilters">Currently enabled filters</param>
/// <param name="factory">The session factory constructing this translator instance.</param>
public QueryTranslatorImpl(
string queryIdentifier,
IQueryExpression queryExpression,
IDictionary<string, IFilter> enabledFilters,
ISessionFactoryImplementor factory)
{
_queryIdentifier = queryIdentifier;
_hql = queryExpression.ToString();
_compiled = false;
_shallowQuery = false;
_enabledFilters = enabledFilters;
_factory = factory;
_parser = new HqlParseEngine(queryExpression.Translate(factory), factory);
}
/// <summary>
/// Performs both filter and non-filter compiling.
/// </summary>
/// <param name="replacements">Defined query substitutions.</param>
/// <param name="shallow">Does this represent a shallow (scalar or entity-id) select?</param>
/// <param name="collectionRole">the role name of the collection used as the basis for the filter, NULL if this is not a filter.</param>
private void DoCompile(IDictionary <string, string> replacements, bool shallow, String collectionRole)
{
// If the query is already compiled, skip the compilation.
if (_compiled)
{
if (log.IsDebugEnabled)
{
log.Debug("compile() : The query is already compiled, skipping...");
}
return;
}
// Remember the parameters for the compilation.
tokenReplacements = replacements ?? new Dictionary <string, string>(1);
_shallowQuery = shallow;
try
{
// PHASE 1 : Parse the HQL into an AST.
HqlParseEngine parser = Parse(true);
// PHASE 2 : Analyze the HQL AST, and produce an SQL AST.
var translator = Analyze(parser, collectionRole);
sqlAst = translator.SqlStatement;
// at some point the generate phase needs to be moved out of here,
// because a single object-level DML might spawn multiple SQL DML
// command executions.
//
// Possible to just move the sql generation for dml stuff, but for
// consistency-sake probably best to just move responsiblity for
// the generation phase completely into the delegates
// (QueryLoader/StatementExecutor) themselves. Also, not sure why
// QueryLoader currently even has a dependency on this at all; does
// it need it? Ideally like to see the walker itself given to the delegates directly...
if (sqlAst.NeedsExecutor)
{
statementExecutor = BuildAppropriateStatementExecutor(sqlAst);
}
else
{
// PHASE 3 : Generate the SQL.
_generator = new HqlSqlGenerator(sqlAst, parser.Tokens, _factory);
_generator.Generate();
_queryLoader = new QueryLoader(this, _factory, sqlAst.Walker.SelectClause);
}
_compiled = true;
}
catch (QueryException qe)
{
qe.QueryString = _hql;
throw;
}
catch (RecognitionException e)
{
// we do not actually propogate ANTLRExceptions as a cause, so
// log it here for diagnostic purposes
if (log.IsInfoEnabled)
{
log.Info("converted antlr.RecognitionException", e);
}
throw QuerySyntaxException.Convert(e, _hql);
}
_enabledFilters = null; //only needed during compilation phase...
}
private HqlParseEngine Parse(bool isFilter)
{
if (_parser == null)
{
_parser = new HqlParseEngine(_hql, isFilter, _factory);
_parser.Parse();
}
return _parser;
}
private HqlSqlTranslator Analyze(HqlParseEngine parser, string collectionRole)
{
var translator = new HqlSqlTranslator(parser.Ast, parser.Tokens, this, _factory, tokenReplacements,
collectionRole);
translator.Translate();
return translator;
}
