// effects: Given the operation type (AND/OR/NOT) and the relevant number of
// children, returns the corresponding bool expression
private BoolExpression(ExprType opType, IEnumerable <BoolExpression> children)
{
List <BoolExpression> childList = new List <BoolExpression>(children);
Debug.Assert(childList.Count > 0);
// If any child is other than true or false, it will have m_memberDomainMap set
foreach (BoolExpression child in children)
{
if (child.m_memberDomainMap != null)
{
m_memberDomainMap = child.m_memberDomainMap;
break;
}
}
switch (opType)
{
case ExprType.And:
m_tree = new DomainAndExpr(ToBoolExprList(childList));
break;
case ExprType.Or:
m_tree = new DomainOrExpr(ToBoolExprList(childList));
break;
case ExprType.Not:
Debug.Assert(childList.Count == 1);
m_tree = new DomainNotExpr(childList[0].m_tree);
break;
default:
Debug.Fail("Unknown expression type");
break;
}
}
protected override StringBuilder NotExprAsCql(DomainNotExpr expression)
{
m_builder.Append("NOT(");
expression.Child.Accept(this); // we do not need the returned StringBuilder -- it is the same as m_builder
m_builder.Append(")");
return(m_builder);
}
internal override StringBuilder VisitNot(DomainNotExpr expression)
{
m_builder.Append("NOT(");
expression.Child.Accept(this);
m_builder.Append(")");
return(m_builder);
}
internal override DomainBoolExpr FixRange(Set <Constant> range, MemberDomainMap memberDomainMap)
{
Debug.Assert(range.Count == 1, "For BoolLiterals, there should be precisely one value - true or false");
ScalarConstant scalar = (ScalarConstant)range.First();
DomainBoolExpr expr = GetDomainBoolExpression(memberDomainMap);
if ((bool)scalar.Value == false)
{
// The range of the variable was "inverted". Return a NOT of
// the expression
expr = new DomainNotExpr(expr);
}
return(expr);
}
internal override StringBuilder VisitNot(DomainNotExpr expression)
{
m_skipIsNotNull = false; // Cannot skip in NOTs
DomainTermExpr termExpr = expression.Child as DomainTermExpr;
if (termExpr != null)
{
BoolLiteral literal = BoolExpression.GetBoolLiteral(termExpr);
return(literal.AsNegatedUserString(m_builder, m_blockAlias, m_skipIsNotNull));
}
else
{
m_builder.Append("NOT(");
// We do not need the returned StringBuilder -- it is the same as m_builder
expression.Child.Accept(this);
m_builder.Append(")");
}
return(m_builder);
}
internal override IEnumerable <DomainTermExpr> VisitNot(DomainNotExpr expression)
{
Debug.Assert(m_allowAllOperators, "Term should not be called when Nots are present in the expression");
return(VisitTreeNode(expression));
}
protected abstract T_Return NotExprAsCql(DomainNotExpr expression);
internal override T_Return VisitNot(DomainNotExpr expression)
{
m_skipIsNotNull = false; // Cannot skip in NOTs
return(NotExprAsCql(expression));
}
protected override DbExpression NotExprAsCql(DomainNotExpr expression)
{
DbExpression cqt = expression.Child.Accept(this);
return(cqt.Not());
}
internal override bool VisitNot(DomainNotExpr expression)
{
return(expression.Child.Accept(this));
}