/// <summary>
/// Test condition for True or False value.
/// </summary>
/// <returns></returns>
public bool Test()
{
switch (_type)
{
case ExpressionType.True:
return(true);
case ExpressionType.Not:
Trace.Assert(eArg2 == null, "Expression.test");
return(!eArg.Test());
case ExpressionType.And:
return(eArg.Test() && eArg2.Test());
case ExpressionType.Or:
return(eArg.Test() || eArg2.Test());
case ExpressionType.Like:
// todo: now for all tests a new 'like' object required!
string s = (string)eArg2.GetValue(ColumnType.VarChar);
ColumnType type = eArg._columnType;
Like l = new Like(s, cLikeEscape, type == ColumnType.VarCharIgnoreCase);
string c = (string)eArg.GetValue(ColumnType.VarChar);
return(l.Compare(c));
case ExpressionType.In:
return(eArg2.TestValueList(eArg.GetValue(), eArg._columnType));
case ExpressionType.Exists:
Result r = eArg.sSelect.GetResult(1, null); // 1 is already enough
return(r.Root != null);
}
Trace.Check(eArg != null, Trace.GENERAL_ERROR);
object o = eArg.GetValue();
ColumnType dtype = eArg._columnType;
Trace.Check(eArg2 != null, Trace.GENERAL_ERROR);
object o2 = eArg2.GetValue(dtype);
int result = Column.Compare(o, o2, dtype);
switch (_type)
{
case ExpressionType.Equal:
return(result == 0);
case ExpressionType.Bigger:
return(result > 0);
case ExpressionType.BiggerEqual:
return(result >= 0);
case ExpressionType.SmallerEqual:
return(result <= 0);
case ExpressionType.Smaller:
return(result < 0);
case ExpressionType.NotEqual:
return(result != 0);
}
Trace.Assert(false, "Expression.test2");
return(false);
}
/// <summary>
/// Test condition for True or False value.
/// </summary>
/// <returns></returns>
public bool Test()
{
switch (_type)
{
case ExpressionType.True:
return true;
case ExpressionType.Not:
TracingHelper.Assert(eArg2 == null, "Expression.test");
return !eArg.Test();
case ExpressionType.And:
return eArg.Test() && eArg2.Test();
case ExpressionType.Or:
return eArg.Test() || eArg2.Test();
case ExpressionType.Like:
// todo: now for all tests a new 'like' object required!
string s = (string) eArg2.GetValue(ColumnType.VarChar);
ColumnType type = eArg._columnType;
Like l = new Like(s, cLikeEscape, type == ColumnType.VarCharIgnoreCase);
string c = (string) eArg.GetValue(ColumnType.VarChar);
return l.Compare(c);
case ExpressionType.In:
return eArg2.TestValueList(eArg.GetValue(), eArg._columnType);
case ExpressionType.Exists:
Result r = eArg.sSelect.GetResult(1, null); // 1 is already enough
return r.Root != null;
}
TracingHelper.Check(eArg != null, TracingHelper.GENERAL_ERROR);
object o = eArg.GetValue();
ColumnType dtype = eArg._columnType;
TracingHelper.Check(eArg2 != null, TracingHelper.GENERAL_ERROR);
object o2 = eArg2.GetValue(dtype);
int result = Column.Compare(o, o2, dtype);
switch (_type)
{
case ExpressionType.Equal:
return result == 0;
case ExpressionType.Bigger:
return result > 0;
case ExpressionType.BiggerEqual:
return result >= 0;
case ExpressionType.SmallerEqual:
return result <= 0;
case ExpressionType.Smaller:
return result < 0;
case ExpressionType.NotEqual:
return result != 0;
}
TracingHelper.Assert(false, "Expression.test2");
return false;
}