Class AdqlValidator


  • public class AdqlValidator
    extends java.lang.Object
    Handles validation of ADQL queries. In the current implementation the heavy lifting is done by Gregory Mantelet's ADQL parser.
    Since:
    3 Oct 2011
    Author:
    Mark Taylor
    • Constructor Detail

      • AdqlValidator

        public AdqlValidator​(AdqlValidator.ValidatorTable[] vtables,
                             adql.db.FunctionDef[] udfs,
                             java.lang.String[] geoFuncs)
        Constructor. Note empty arrays restrict possibilities (to none), but null values allow anything.
        Parameters:
        vtables - table metadata for database to be checked against
        udfs - array of permitted user-defined-functions, or null to permit all (but ignored if vtables is null)
        geoFuncs - array of permitted ADQL geometry function names, or null to permit all those defined by ADQL (sec 2.4) (but ignored if vtables is null)
    • Method Detail

      • validate

        public void validate​(java.lang.String query)
                      throws java.lang.Throwable
        Validates an ADQL string. Any throwable returned hopefully includes useful information about the location and nature of the parse error, but that depends on the implementation.
        Parameters:
        query - ADQL query string
        Throws:
        java.lang.Throwable - if the string is not valid ADQL
      • createValidator

        public static AdqlValidator createValidator​(AdqlValidator.ValidatorTable[] vtables,
                                                    TapLanguage lang)
        Creates an instance given a set of table metadata and a TapLanguage description object. The language object's TapLanguageFeature map is examined to determine what UDFs and ADQL geometry functions are supported. In the case of no description of UDFs and geom functions, no restrictions are imposed.
        Parameters:
        vtables - table metadata
        lang - language specifics
      • main

        public static void main​(java.lang.String[] args)
                         throws java.lang.Throwable,
                                java.io.IOException,
                                org.xml.sax.SAXException
        Tests parser. Use -h for usage.
        Throws:
        java.lang.Throwable
        java.io.IOException
        org.xml.sax.SAXException