Example #1
0
func extensionPoint(G *digraph.Digraph, emb *subgraph.Embedding, e *digraph.Edge, src, targ int) *subgraph.Extension {
	hasTarg := false
	hasSrc := false
	var srcIdx int = len(emb.SG.V)
	var targIdx int = len(emb.SG.V)
	if src >= 0 {
		hasSrc = true
		srcIdx = src
	}
	if targ >= 0 {
		hasTarg = true
		targIdx = targ
	}
	for idx, id := range emb.Ids {
		if hasTarg && hasSrc {
			break
		}
		if !hasSrc && e.Src == id {
			hasSrc = true
			srcIdx = idx
		}
		if !hasTarg && e.Targ == id {
			hasTarg = true
			targIdx = idx
		}
	}
	return subgraph.NewExt(
		subgraph.Vertex{Idx: srcIdx, Color: G.V[e.Src].Color},
		subgraph.Vertex{Idx: targIdx, Color: G.V[e.Targ].Color},
		e.Color)
}
Example #2
0
File: types.go Project: timtadh/sfp
func DeserializeExtension(bytes []byte) *subgraph.Extension {
	srcIdx := int(binary.BigEndian.Uint32(bytes[0:4]))
	srcColor := int(binary.BigEndian.Uint32(bytes[4:8]))
	targIdx := int(binary.BigEndian.Uint32(bytes[8:12]))
	targColor := int(binary.BigEndian.Uint32(bytes[12:16]))
	color := int(binary.BigEndian.Uint32(bytes[16:20]))
	return subgraph.NewExt(
		subgraph.Vertex{Idx: srcIdx, Color: srcColor},
		subgraph.Vertex{Idx: targIdx, Color: targColor},
		color,
	)
}
Example #3
0
func extensionsFromFreqEdges(dt *Digraph, pattern *subgraph.SubGraph, ei subgraph.EmbIterator, seen map[int]bool) (total int, overlap []map[int]bool, fisEmbs []*subgraph.Embedding, sets []*hashtable.LinearHash, exts types.Set) {
	if dt.Mode&FIS == FIS {
		seen = make(map[int]bool)
		fisEmbs = make([]*subgraph.Embedding, 0, 10)
	} else {
		sets = make([]*hashtable.LinearHash, len(pattern.V))
	}
	if dt.Mode&OverlapPruning == OverlapPruning {
		overlap = make([]map[int]bool, len(pattern.V))
	}
	support := dt.Support()
	done := make(chan types.Set)
	go func(done chan types.Set) {
		exts := make(chan *subgraph.Extension, len(pattern.V))
		go func() {
			hash := set.NewSetMap(hashtable.NewLinearHash())
			for ext := range exts {
				if !pattern.HasExtension(ext) {
					hash.Add(ext)
				}
			}
			done <- hash
			close(done)
		}()
		for i := range pattern.V {
			u := &pattern.V[i]
			for _, e := range dt.Indices.EdgesFromColor[u.Color] {
				for j := range pattern.V {
					v := &pattern.V[j]
					if v.Color == e.TargColor {
						ep := subgraph.NewExt(
							subgraph.Vertex{Idx: i, Color: e.SrcColor},
							subgraph.Vertex{Idx: j, Color: e.TargColor},
							e.EdgeColor)
						exts <- ep
					}
				}
				ep := subgraph.NewExt(
					subgraph.Vertex{Idx: i, Color: u.Color},
					subgraph.Vertex{Idx: len(pattern.V), Color: e.TargColor},
					e.EdgeColor)
				exts <- ep
			}
			for _, e := range dt.Indices.EdgesToColor[u.Color] {
				ep := subgraph.NewExt(
					subgraph.Vertex{Idx: len(pattern.V), Color: e.SrcColor},
					subgraph.Vertex{Idx: i, Color: u.Color},
					e.EdgeColor)
				exts <- ep
			}
		}
		close(exts)
	}(done)
	stop := false
	for emb, next := ei(stop); next != nil; emb, next = next(stop) {
		min := -1
		seenIt := false
		for idx, id := range emb.Ids {
			if fisEmbs != nil {
				if seen[id] {
					seenIt = true
				}
			}
			if overlap != nil {
				if overlap[idx] == nil {
					overlap[idx] = make(map[int]bool)
				}
				overlap[idx][id] = true
			}
			if seen != nil {
				seen[id] = true
			}
			if sets != nil {
				if sets[idx] == nil {
					sets[idx] = hashtable.NewLinearHash()
				}
				set := sets[idx]
				if !set.Has(types.Int(id)) {
					set.Put(types.Int(id), emb)
				}
				size := set.Size()
				if min == -1 || size < min {
					min = size
				}
			}
		}
		if fisEmbs != nil && !seenIt {
			fisEmbs = append(fisEmbs, emb)
			min = len(fisEmbs)
		}
		total++
		if min >= support {
			stop = true
		}
	}
	if total < support {
		return total, overlap, fisEmbs, sets, nil
	}
	return total, overlap, fisEmbs, sets, <-done
}