private void RebuildFilter()
{
this.FilterDescriptors.BeginUpdate();
for (int index = this.FilterDescriptors.Count - 1; index >= 0; --index)
{
FilterDescriptor filterDescriptor = this.FilterDescriptors[index];
filterDescriptor.PropertyChanged -= new PropertyChangedEventHandler(this.FilterExpression_PropertyChanged);
this.FilterDescriptors.Remove(filterDescriptor);
}
this.FilterDescriptors.Clear();
FilterDescriptorCollection filterDescriptors = this.FilterDescriptors;
if (this.predicates.Count > 0)
{
filterDescriptors.LogicalOperator = GridViewHelper.GetLogicalOperator(this.predicates[0].BinaryOperator);
}
List <FilterPredicate> validPredicates = this.GetValidPredicates();
for (int index = 0; index < validPredicates.Count; ++index)
{
object[] predicateValues = this.GetPredicateValues(validPredicates[index]);
FilterOperator filterOperator = GridViewHelper.GetFilterOperator(validPredicates[index].Function);
if (filterOperator != FilterOperator.None)
{
FilterDescriptor filterDescriptor = new FilterDescriptor(this.PropertyName, filterOperator, predicateValues[0]);
filterDescriptor.PropertyChanged += new PropertyChangedEventHandler(this.FilterExpression_PropertyChanged);
filterDescriptors.Add(filterDescriptor);
}
else
{
CompositeFilterDescriptor.DescriptorType type = CompositeFilterDescriptor.DescriptorType.Between;
if (this.predicates[index].Function == GridKnownFunction.NotBetween)
{
type = CompositeFilterDescriptor.DescriptorType.NotBetween;
}
CompositeFilterDescriptor descriptor = CompositeFilterDescriptor.CreateDescriptor(type, this.PropertyName, predicateValues[0], predicateValues[1]);
descriptor.PropertyChanged += new PropertyChangedEventHandler(this.FilterExpression_PropertyChanged);
filterDescriptors.Add((FilterDescriptor)descriptor);
}
if (this.IsComposite(validPredicates.Count - index, validPredicates))
{
CompositeFilterDescriptor filterDescriptor = new CompositeFilterDescriptor();
filterDescriptor.PropertyChanged += new PropertyChangedEventHandler(this.FilterExpression_PropertyChanged);
filterDescriptor.LogicalOperator = GridViewHelper.GetLogicalOperator(validPredicates[index + 2].BinaryOperator);
filterDescriptors.Add((FilterDescriptor)filterDescriptor);
filterDescriptors = filterDescriptor.FilterDescriptors;
}
}
this.FilterDescriptors.EndUpdate();
}
//private void Parse(string expression)
//{
// ExpressionNode root = ExpressionParser.Parse(expression, false);
// //validate name nodes
// this.BeginUpdate();
// this.Clear();
// Stack<ExpressionNode> nodeStack = new Stack<ExpressionNode>();
// nodeStack.Push(root);
// Stack<FilterExpressionCollection> collectionStack = new Stack<FilterExpressionCollection>();
// collectionStack.Push(this);
// while (nodeStack.Count > 0)
// {
// ExpressionNode current = nodeStack.Pop();
// FilterExpressionCollection expressions = collectionStack.Pop();
// UnaryOpNode unaryNode = current as UnaryOpNode;
// if (unaryNode != null)
// {
// if (unaryNode.Op == Operator.Noop)
// {
// nodeStack.Push(((UnaryOpNode)current).Right);
// collectionStack.Push(expressions);
// continue;
// }
// }
// BinaryOpNode binaryNode = current as BinaryOpNode;
// if (binaryNode != null)
// {
// if (this.IsPredicate(binaryNode))
// {
// FilterExpression filterExpression = new FilterExpression();
// expressions.Add(filterExpression);
// continue;
// }
// nodeStack.Push(binaryNode.Right);
// FilterExpressionCollection collection = expressions;
// if(!this.IsPredicate(binaryNode.Right))
// {
// CompositeFilterExpression compositeExpression = new CompositeFilterExpression();
// expressions.Add(compositeExpression);
// collection = compositeExpression.FilterExpressions;
// }
// collectionStack.Push(collection);
// nodeStack.Push(binaryNode.Left);
// collection = expressions;
// if (!this.IsPredicate(binaryNode.Left))
// {
// CompositeFilterExpression compositeExpression = new CompositeFilterExpression();
// compositeExpression.BinaryOperator = (binaryNode.Op == Operator.And) ? FilterExpression.BinaryOperation.AND : FilterExpression.BinaryOperation.OR;
// expressions.Add(compositeExpression);
// collection = compositeExpression.FilterExpressions;
// }
// collectionStack.Push(collection);
// }
// }
// this.EndUpdate();
//}
//private bool IsPredicate(ExpressionNode node)
//{
// while (node is UnaryOpNode)
// {
// node = ((UnaryOpNode)node).Right;
// }
// BinaryOpNode binaryNode = node as BinaryOpNode;
// if (binaryNode == null)
// {
// return false;
// }
// if (binaryNode.Left is NameNode || binaryNode.Right is NameNode)
// {
// return true;
// }
// return false;
//}
private void Parse(string expression)
{
ExpressionNode root = ExpressionParser.Parse(expression, false);
//validate name nodes
this.BeginUpdate();
this.Clear();
Stack <ExpressionNode> nodeStack = new Stack <ExpressionNode>();
nodeStack.Push(root);
Stack <FilterDescriptorCollection> collectionStack = new Stack <FilterDescriptorCollection>();
collectionStack.Push(this);
while (nodeStack.Count > 0)
{
ExpressionNode current = nodeStack.Pop();
FilterDescriptorCollection expressions = collectionStack.Pop();
UnaryOpNode unaryNode = current as UnaryOpNode;
if (unaryNode != null)
{
if (unaryNode.Op == Operator.Noop)
{
nodeStack.Push(((UnaryOpNode)current).Right);
collectionStack.Push(expressions);
continue;
}
}
BinaryOpNode binaryNode = current as BinaryOpNode;
if (binaryNode != null)
{
if (this.IsPredicate(binaryNode))
{
FilterDescriptor filterDescriptor = this.CreateFilterDescriptor(binaryNode);
expressions.Add(filterDescriptor);
continue;
}
nodeStack.Push(binaryNode.Right);
FilterDescriptorCollection collection = expressions;
if (!this.IsPredicate(binaryNode.Right))
{
CompositeFilterDescriptor compositeExpression = new CompositeFilterDescriptor();
expressions.Add(compositeExpression);
collection = compositeExpression.FilterDescriptors;
}
collectionStack.Push(collection);
nodeStack.Push(binaryNode.Left);
collection = expressions;
if (!this.IsPredicate(binaryNode.Left))
{
CompositeFilterDescriptor compositeExpression = new CompositeFilterDescriptor();
compositeExpression.LogicalOperator = (binaryNode.Op == Operator.And) ? FilterLogicalOperator.And : FilterLogicalOperator.Or;
expressions.Add(compositeExpression);
collection = compositeExpression.FilterDescriptors;
}
collectionStack.Push(collection);
}
}
this.EndUpdate();
}
public CompositeFilterDescriptor()
{
this.filters = new FilterDescriptorCollection();
}
public CompositeFilterDescriptor()
{
this.filters = new FilterDescriptorCollection();
this.filters.CollectionChanged += new NotifyCollectionChangedEventHandler(this.filters_CollectionChanged);
}
private void Parse(string expression)
{
ExpressionNode binaryNode1 = ExpressionParser.Parse(expression, false);
this.BeginUpdate();
this.Clear();
Stack <ExpressionNode> expressionNodeStack = new Stack <ExpressionNode>();
expressionNodeStack.Push(binaryNode1);
Stack <FilterDescriptorCollection> descriptorCollectionStack = new Stack <FilterDescriptorCollection>();
descriptorCollectionStack.Push(this);
this.LogicalOperator = this.GetCompositeFilterDescriptorLogicalOperator(binaryNode1);
bool flag = false;
while (expressionNodeStack.Count > 0)
{
ExpressionNode expressionNode = expressionNodeStack.Pop();
FilterDescriptorCollection descriptorCollection1 = descriptorCollectionStack.Pop();
UnaryOpNode unaryOpNode = expressionNode as UnaryOpNode;
if (unaryOpNode != null)
{
if (unaryOpNode.Op == Operator.Noop)
{
expressionNodeStack.Push(((UnaryOpNode)expressionNode).Right);
descriptorCollectionStack.Push(descriptorCollection1);
continue;
}
if (unaryOpNode.Op == Operator.Not)
{
expressionNodeStack.Push(((UnaryOpNode)expressionNode).Right);
flag = true;
descriptorCollectionStack.Push(descriptorCollection1);
continue;
}
}
BinaryOpNode binaryNode2 = expressionNode as BinaryOpNode;
if (binaryNode2 != null)
{
if (this.IsPredicate((ExpressionNode)binaryNode2))
{
FilterDescriptor filterDescriptor = this.CreateFilterDescriptor(binaryNode2);
if (flag)
{
filterDescriptor.Operator = this.GetNegativeOperator(filterDescriptor.Operator);
flag = false;
}
descriptorCollection1.Add(filterDescriptor);
}
else
{
expressionNodeStack.Push(binaryNode2.Right);
FilterDescriptorCollection descriptorCollection2 = descriptorCollection1;
if (!this.IsPredicate(binaryNode2.Right))
{
CompositeFilterDescriptor filterDescriptor = new CompositeFilterDescriptor();
filterDescriptor.LogicalOperator = this.GetCompositeFilterDescriptorLogicalOperator(binaryNode2.Right);
descriptorCollection1.Add((FilterDescriptor)filterDescriptor);
descriptorCollection2 = filterDescriptor.FilterDescriptors;
}
descriptorCollectionStack.Push(descriptorCollection2);
expressionNodeStack.Push(binaryNode2.Left);
FilterDescriptorCollection descriptorCollection3 = descriptorCollection1;
if (!this.IsPredicate(binaryNode2.Left))
{
CompositeFilterDescriptor filterDescriptor = new CompositeFilterDescriptor();
filterDescriptor.LogicalOperator = this.GetCompositeFilterDescriptorLogicalOperator(binaryNode2.Left);
descriptorCollection1.Add((FilterDescriptor)filterDescriptor);
descriptorCollection3 = filterDescriptor.FilterDescriptors;
}
descriptorCollectionStack.Push(descriptorCollection3);
}
}
}
this.EndUpdate();
}
