//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldFollowSpecificRelationship()
public virtual void ShouldFollowSpecificRelationship()
{
// given
using (NodeCursor node = cursors.allocateNodeCursor(), RelationshipGroupCursor group = cursors.allocateRelationshipGroupCursor(), RelationshipTraversalCursor relationship = cursors.allocateRelationshipTraversalCursor())
{
// when - traversing from start to end
read.singleNode(_start, node);
assertTrue("access start node", node.Next());
node.Relationships(group);
assertTrue("access relationship group", group.next());
group.Outgoing(relationship);
assertTrue("access outgoing relationships", relationship.next());
// then
assertEquals("source node", _start, relationship.SourceNodeReference());
assertEquals("target node", _end, relationship.TargetNodeReference());
assertEquals("node of origin", _start, relationship.OriginNodeReference());
assertEquals("neighbouring node", _end, relationship.NeighbourNodeReference());
assertEquals("relationship should have same label as group", group.Type(), relationship.Type());
assertFalse("only a single relationship", relationship.next());
group.Incoming(relationship);
assertFalse("no incoming relationships", relationship.next());
group.Loops(relationship);
assertFalse("no loop relationships", relationship.next());
assertFalse("only a single group", group.next());
// when - traversing from end to start
read.singleNode(_end, node);
assertTrue("access start node", node.Next());
node.Relationships(group);
assertTrue("access relationship group", group.next());
group.Incoming(relationship);
assertTrue("access incoming relationships", relationship.next());
// then
assertEquals("source node", _start, relationship.SourceNodeReference());
assertEquals("target node", _end, relationship.TargetNodeReference());
assertEquals("node of origin", _end, relationship.OriginNodeReference());
assertEquals("neighbouring node", _start, relationship.NeighbourNodeReference());
assertEquals("relationship should have same label as group", group.Type(), relationship.Type());
assertFalse("only a single relationship", relationship.next());
group.Outgoing(relationship);
assertFalse("no outgoing relationships", relationship.next());
group.Loops(relationship);
assertFalse("no loop relationships", relationship.next());
assertFalse("only a single group", group.next());
}
}
/// <summary>
/// Counts the number of incoming relationships from node where the cursor is positioned.
/// <para>
/// NOTE: The number of incoming relationships also includes eventual loops.
///
/// </para>
/// </summary>
/// <param name="nodeCursor"> a cursor positioned at the node whose relationships we're counting </param>
/// <param name="cursors"> a factory for cursors </param>
/// <returns> the number of incoming - including loops - relationships from the node </returns>
public static int CountIncoming(NodeCursor nodeCursor, CursorFactory cursors)
{
if (nodeCursor.Dense)
{
using (RelationshipGroupCursor group = cursors.AllocateRelationshipGroupCursor())
{
nodeCursor.Relationships(group);
int count = 0;
while (group.next())
{
count += group.IncomingCount() + group.LoopCount();
}
return(count);
}
}
else
{
using (RelationshipTraversalCursor traversal = cursors.AllocateRelationshipTraversalCursor())
{
int count = 0;
nodeCursor.AllRelationships(traversal);
while (traversal.next())
{
if (traversal.TargetNodeReference() == nodeCursor.NodeReference())
{
count++;
}
}
return(count);
}
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: private static String computeKey(org.neo4j.internal.kernel.api.Transaction transaction, RelationshipTraversalCursor r) throws org.neo4j.internal.kernel.api.exceptions.KernelException
private static string ComputeKey([email protected] transaction, RelationshipTraversalCursor r)
{
Direction d;
if (r.SourceNodeReference() == r.TargetNodeReference())
{
d = Direction.BOTH;
}
else if (r.SourceNodeReference() == r.OriginNodeReference())
{
d = Direction.OUTGOING;
}
else
{
d = Direction.INCOMING;
}
return(ComputeKey(transaction.Token().relationshipTypeName(r.Type()), d));
}