Class SimpleStringMethod

java.lang.Object
org.datanucleus.store.rdbms.sql.method.SimpleStringMethod
All Implemented Interfaces:
SQLMethod
Direct Known Subclasses:
StringToLowerMethod, StringToUpperMethod, StringTrimLeftMethod, StringTrimMethod, StringTrimRightMethod

public abstract class SimpleStringMethod extends Object implements SQLMethod
Expression handler to invoke an SQL String function that takes in an expression.
  • If the expression is a StringExpression will returns a StringExpression
    {functionName}({stringExpr})
    and args aren't used
  • If the expression is null will return a StringExpression
    {functionName}({args})
    and expr isn't used
  • Constructor Details

    • SimpleStringMethod

      public SimpleStringMethod()
  • Method Details

    • getFunctionName

      protected abstract String getFunctionName()
    • getExpression

      public SQLExpression getExpression(SQLStatement stmt, SQLExpression expr, List<SQLExpression> args)
      Description copied from interface: SQLMethod
      Return the expression for this SQL function.
      Specified by:
      getExpression in interface SQLMethod
      Parameters:
      stmt - SQLStatement that this expression is for
      expr - The expression that it is invoked on
      args - Arguments passed in
      Returns:
      The SQL expression using the SQL function