public ImplicationNode(FilterImplication implication)
: this()
{
this.Implication = implication;
}
public static ExpressionTree AssociateTreeWithFilter(ExpressionTree tree, FilterBase filter,
FilterImplication implication, TreeDirection treeDirection)
{
// check the parameters
Debug.Assert(tree != null && filter != null, "Null parameters");
ExpressionTree result = new ExpressionTree();
if(treeDirection == TreeDirection.Left) {
result.AddRoot(ExpressionType.Implication, implication);
result.Root.Left = tree.Root;
result.AddNode(result.Root, TreeDirection.Right, ExpressionType.Filter, filter);
}
else {
result.AddRoot(ExpressionType.Implication, implication);
result.Root.Right = tree.Root;
result.AddNode(result.Root, TreeDirection.Left, ExpressionType.Filter, filter);
}
return result;
}
public static ExpressionTree AssociateFilters(FilterBase a, FilterBase b,
FilterImplication implication)
{
// check the parameters
Debug.Assert(a != null && b != null, "Null parameters");
ExpressionTree result = new ExpressionTree();
result.AddRoot(ExpressionType.Implication, implication);
result.AddNode(result.Root, TreeDirection.Left, ExpressionType.Filter, a);
result.AddNode(result.Root, TreeDirection.Right, ExpressionType.Filter, b);
return result;
}
public static ExpressionTree AssociateTrees(ExpressionTree a, ExpressionTree b, FilterImplication implication)
{
// check the parameters
Debug.Assert(a != null && b != null, "Null parameters");
ExpressionTree result = new ExpressionTree();
result.AddRoot(ExpressionType.Implication, implication);
result.Root.Left = a.Root;
result.Root.Right = b.Root;
return result;
}
/// <summary>
/// Gets the type of the implication.
/// </summary>
/// <param name="s">The string.</param>
/// <param name="implication">The implication.</param>
/// <returns></returns>
private bool GetImplicationType(string s, out FilterImplication implication)
{
implication = FilterImplication.AND;
if(s == null || s.Length == 0) {
return false;
}
if(s == AndImplication) {
implication = FilterImplication.AND;
return true;
}
else if(s == OrImplication) {
implication = FilterImplication.OR;
return true;
}
return false;
}