Class CastHelper


  • public class CastHelper
    extends java.lang.Object
    Various utility methods for helping to cast a Java object to a type that is conformant to an SQL type.
    Author:
    Tobias Downer
    • Constructor Summary

      Constructors 
      Constructor Description
      CastHelper()  
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.Object castObjectToSQLType​(java.lang.Object ob, int sql_type, int sql_size, int sql_scale, java.lang.String sql_type_string)
      Casts a Java object to the SQL type specified by the given DataTableColumnDef object.
      static java.util.Date toDate​(java.lang.String str)
      Parses a String as an SQL date.
      static java.util.Date toTime​(java.lang.String str)
      Parses a String as an SQL time.
      static java.util.Date toTimeStamp​(java.lang.String str)
      Parses a String as an SQL timestamp.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • CastHelper

        public CastHelper()
    • Method Detail

      • toDate

        public static java.util.Date toDate​(java.lang.String str)
        Parses a String as an SQL date.
      • toTime

        public static java.util.Date toTime​(java.lang.String str)
        Parses a String as an SQL time.
      • toTimeStamp

        public static java.util.Date toTimeStamp​(java.lang.String str)
        Parses a String as an SQL timestamp.
      • castObjectToSQLType

        public static java.lang.Object castObjectToSQLType​(java.lang.Object ob,
                                                           int sql_type,
                                                           int sql_size,
                                                           int sql_scale,
                                                           java.lang.String sql_type_string)
        Casts a Java object to the SQL type specified by the given DataTableColumnDef object. This is used for the following engine functions;
        1. To prepare a value for insertion into the data store. For example, the table column may be STRING but the value here is a BigNumber.
        2. To cast an object to a specific type in an SQL function such as CAST.
        Given any supported object, this will return the internal database representation of the object as either NullObject, BigNumber, String, Date, Boolean or ByteLongObject.
        Parameters:
        ob - the Object to cast to the given type
        sql_type - the enumerated sql type, eg. SQLTypes.LONGVARCHAR
        sql_size - the size of the type. For example, CHAR(20)
        sql_scale - the scale of the numerical type.
        sql_type_string - 'sql_type' as a human understandable string, eg. "LONGVARCHAR"