/// <summary>
/// perform a logical and of 2 QueryNode trees. if q1 and q2 are ANDQueryNode
/// nodes it uses head Node from q1 and adds the children of q2 to q1 if q1 is
/// a AND node and q2 is not, add q2 as a child of the head node of q1 if q2 is
/// a AND node and q1 is not, add q1 as a child of the head node of q2 if q1
/// and q2 are not ANDQueryNode nodes, create a AND node and make q1 and q2
/// children of that node if q1 or q2 is null it returns the not null node if
/// q1 = q2 = null it returns null
/// </summary>
public static IQueryNode LogicalAnd(IQueryNode q1, IQueryNode q2)
{
if (q1 == null)
{
return(q2);
}
if (q2 == null)
{
return(q1);
}
ANDOperation op /* = null*/;
if (q1 is AndQueryNode && q2 is AndQueryNode)
{
op = ANDOperation.BOTH;
}
else if (q1 is AndQueryNode)
{
op = ANDOperation.Q1;
}
else if (q1 is AndQueryNode)
{
op = ANDOperation.Q2;
}
else
{
op = ANDOperation.NONE;
}
IQueryNode result = null;
switch (op)
{
case ANDOperation.NONE:
List <IQueryNode> children = new List <IQueryNode>();
children.Add(q1.CloneTree());
children.Add(q2.CloneTree());
result = new AndQueryNode(children);
return(result);
case ANDOperation.Q1:
result = q1.CloneTree();
result.Add(q2.CloneTree());
return(result);
case ANDOperation.Q2:
result = q2.CloneTree();
result.Add(q1.CloneTree());
return(result);
case ANDOperation.BOTH:
result = q1.CloneTree();
result.Add(q2.CloneTree().GetChildren());
return(result);
}
return(null);
}
/// <summary>
/// perform a logical and of 2 QueryNode trees. if q1 and q2 are ANDQueryNode
/// nodes it uses head Node from q1 and adds the children of q2 to q1 if q1 is
/// a AND node and q2 is not, add q2 as a child of the head node of q1 if q2 is
/// a AND node and q1 is not, add q1 as a child of the head node of q2 if q1
/// and q2 are not ANDQueryNode nodes, create a AND node and make q1 and q2
/// children of that node if q1 or q2 is null it returns the not null node if
/// q1 = q2 = null it returns null
/// </summary>
public static IQueryNode LogicalAnd(IQueryNode q1, IQueryNode q2)
{
if (q1 == null)
{
return(q2);
}
if (q2 == null)
{
return(q1);
}
ANDOperation op /* = null*/;
if (q1 is AndQueryNode && q2 is AndQueryNode)
{
op = ANDOperation.BOTH;
}
else if (q1 is AndQueryNode)
{
op = ANDOperation.Q1;
}
else if (q1 is AndQueryNode)
{
op = ANDOperation.Q2;
}
else
{
op = ANDOperation.NONE;
}
IQueryNode result; // LUCENENET: IDE0059: Remove unnecessary value assignment
switch (op)
{
case ANDOperation.NONE:
List <IQueryNode> children = new List <IQueryNode>
{
q1.CloneTree(),
q2.CloneTree()
};
result = new AndQueryNode(children);
return(result);
case ANDOperation.Q1:
result = q1.CloneTree();
result.Add(q2.CloneTree());
return(result);
case ANDOperation.Q2:
result = q2.CloneTree();
result.Add(q1.CloneTree());
return(result);
case ANDOperation.BOTH:
result = q1.CloneTree();
result.Add(q2.CloneTree().GetChildren());
return(result);
}
return(null);
}
