public SearchPropBase GetLeftOrRight(BoolExprOperand operand)
{
if (operand == BoolExprOperand.Left)
{
return(LeftOperand);
}
return(RightOperand);
}
public void SetLeftOrRight(BoolExprOperand operand, SearchPropBase prop)
{
if (operand == BoolExprOperand.Left)
{
LeftOperand = prop;
return;
}
RightOperand = prop;
}
/// <summary>
/// Add a property criterion to a search unit.
/// set to the left or to the right operand of the expression.
/// </summary>
/// <param name="criteria"></param>
/// <param name="keyText"></param>
/// <returns></returns>
public SearchPropCriterionKeyText AddCritPropKeyText(SearchEntity searchEntity, SearchPropBoolExpr boolExprParent, BoolExprOperand leftOrRight, string keyText)
{
if (searchEntity == null)
{
return(null);
}
if (boolExprParent == null)
{
return(null);
}
// check the text
if (string.IsNullOrWhiteSpace(keyText))
{
return(null);
}
// check that the criterion does not already exists
if (boolExprParent.GetLeftOrRight(leftOrRight) != null)
{
return(null);
}
SearchPropCriterionKeyText criterionPropKeyText = CreateSearchPropCriterionPropKeyText(keyText);
// set the prop operand to the left or to the right
boolExprParent.SetLeftOrRight(leftOrRight, criterionPropKeyText);
return(criterionPropKeyText);
}
/// <summary>
/// create a boolean expression.
/// </summary>
/// <param name="searchEntityUnit"></param>
/// <param name="searchPropParent"></param>
/// <returns></returns>
public SearchPropBoolExpr AddSearchPropBoolExpr(SearchEntity searchEntity, SearchPropBoolExpr boolExprParent, BoolExprOperand leftOrRight, SearchBoolOperator oper)
{
if (searchEntity == null)
{
return(null);
}
if (boolExprParent == null)
{
return(null);
}
// check that the criterion does not already exists
if (searchEntity.SearchPropRoot != null)
{
// a criterion already exists!
return(null);
}
// check that the criterion does not already exists
if (boolExprParent.GetLeftOrRight(leftOrRight) != null)
{
return(null);
}
SearchPropBoolExpr expr = new SearchPropBoolExpr();
expr.Operator = oper;
// set the prop operand to the left or to the right
boolExprParent.SetLeftOrRight(leftOrRight, expr);
return(expr);
}
