protected virtual object EvalPropertyName(ParseTree tree, params object[] paramlist)
{
return((string)this.GetValue(tree, TokenType.IDENT, 0));
}
protected virtual object EvalParameterName(ParseTree tree, params object[] paramlist)
{
return(this.GetValue(tree, TokenType.ObjectName, 0));
}
protected virtual object EvalCommand(ParseTree tree, params object[] paramlist)
{
return(this.GetValue(tree, TokenType.InsertFile, 0) ?? this.GetValue(tree, TokenType.ViewFile, 0) ?? this.GetValue(tree, TokenType.FormatCondition, 0) ?? this.GetValue(tree, TokenType.ComputedColumn, 0) ?? this.GetValue(tree, TokenType.Table, 0) ?? this.GetValue(tree, TokenType.Relation, 0) ?? this.GetValue(tree, TokenType.Connection, 0) ?? this.GetValue(tree, TokenType.Parameter, 0));
}
protected virtual object EvalCOMPUTED_RETURNTYPE(ParseTree tree, params object[] paramlist)
{
return(this.GetValue(tree, TokenType.STRING, 0) ?? this.GetValue(tree, TokenType.INTEGER, 0) ?? this.GetValue(tree, TokenType.DECIMAL, 0) ?? this.GetValue(tree, TokenType.DATETIME, 0) ?? this.GetValue(tree, TokenType.BOOLEAN, 0));
}
/// <summary>
/// this implements the evaluation functionality, cannot be used directly
/// </summary>
/// <param name="tree">the parsetree itself</param>
/// <param name="paramlist">optional input parameters</param>
/// <returns>a partial result of the evaluation</returns>
internal object Eval(ParseTree tree, params object[] paramlist)
{
object Value;
switch (Token.Type)
{
case TokenType.Start:
Value = EvalStart(tree, paramlist);
break;
case TokenType.COMPUTED_RETURNTYPE:
Value = EvalCOMPUTED_RETURNTYPE(tree, paramlist);
break;
case TokenType.Command:
Value = EvalCommand(tree, paramlist);
break;
case TokenType.InsertFile:
Value = EvalInsertFile(tree, paramlist);
break;
case TokenType.ViewFile:
Value = EvalViewFile(tree, paramlist);
break;
case TokenType.FormatCondition:
Value = EvalFormatCondition(tree, paramlist);
break;
case TokenType.ComputedColumn:
Value = EvalComputedColumn(tree, paramlist);
break;
case TokenType.Table:
Value = EvalTable(tree, paramlist);
break;
case TokenType.Relation:
Value = EvalRelation(tree, paramlist);
break;
case TokenType.Connection:
Value = EvalConnection(tree, paramlist);
break;
case TokenType.Parameter:
Value = EvalParameter(tree, paramlist);
break;
case TokenType.ObjectName:
Value = EvalObjectName(tree, paramlist);
break;
case TokenType.ColumnName:
Value = EvalColumnName(tree, paramlist);
break;
case TokenType.TableName:
Value = EvalTableName(tree, paramlist);
break;
case TokenType.TableWithColumns:
Value = EvalTableWithColumns(tree, paramlist);
break;
case TokenType.RelationName:
Value = EvalRelationName(tree, paramlist);
break;
case TokenType.ConnectionName:
Value = EvalConnectionName(tree, paramlist);
break;
case TokenType.ParameterName:
Value = EvalParameterName(tree, paramlist);
break;
case TokenType.FormatFilter:
Value = EvalFormatFilter(tree, paramlist);
break;
case TokenType.PropertyName:
Value = EvalPropertyName(tree, paramlist);
break;
case TokenType.PropertyValue:
Value = EvalPropertyValue(tree, paramlist);
break;
case TokenType.Property:
Value = EvalProperty(tree, paramlist);
break;
default:
Value = Token.Text;
break;
}
return(Value);
}
protected object GetValue(ParseTree tree, TokenType type, int index)
{
return(GetValue(tree, type, ref index));
}
