Removed the leading and trailing whitespaces in the JavaCC parser file;
Organized the declared imports in order to ease further changes in the file and to remove unused ones;
Renamed the S_INTEGER token to S_LONG to be in sync with the S_DOUBLE token;
Corrected the signed expression behaviors and renamed InverseExpression to SignedExpression;
Renamed getWholeColumnName and getWholeTableName to getFullyQualifiedName;
Corrected Sql Server multi-part table and column names (database.schema.table.column) in the select statement to accept 4 levels with empty inner parts;
Replaced a leftover StringBuffer with StringBuilder;