public Graph filter(Graph[] graphs) {
HierarchicalGraph minHGraph = (HierarchicalGraph) graphs[0];
int minElements = Integer.MAX_VALUE;
for (int i = 0; i < graphs.length; i++) {
int count = ((HierarchicalGraph) graphs[i]).getNodeCount();
if (count < minElements) {
minHGraph = (HierarchicalGraph) graphs[i];
minElements = count;
}
}
for (Node n : minHGraph.getNodes().toArray()) {
for (int i = 0; i < graphs.length; i++) {
if ((HierarchicalGraph) graphs[i] != minHGraph) {
if (!((HierarchicalGraph) graphs[i]).contains(n)) {
minHGraph.removeNode(n);
break;
}
}
}
}
for (Edge e : minHGraph.getEdges().toArray()) {
for (int i = 0; i < graphs.length; i++) {
if ((HierarchicalGraph) graphs[i] != minHGraph) {
if (!((HierarchicalGraph) graphs[i]).contains(e)) {
minHGraph.removeEdge(e);
break;
}
}
}
}
return minHGraph;
}
public Graph filter(Graph graph, Filter[] filters) {
HierarchicalGraph hgraph = (HierarchicalGraph) graph;
List<NodeFilter> nodeFilters = new ArrayList<NodeFilter>();
List<EdgeFilter> edgeFilters = new ArrayList<EdgeFilter>();
for (Filter f : filters) {
if (f instanceof NodeFilter) {
nodeFilters.add((NodeFilter) f);
} else if (f instanceof EdgeFilter) {
edgeFilters.add((EdgeFilter) f);
}
}
if (nodeFilters.size() > 0) {
for (Iterator<NodeFilter> itr = nodeFilters.iterator(); itr.hasNext(); ) {
NodeFilter nf = itr.next();
if (!nf.init(hgraph)) {
itr.remove();
}
}
List<Node> nodesToRemove = new ArrayList<Node>();
for (Node n : hgraph.getNodes()) {
for (NodeFilter nf : nodeFilters) {
if (!nf.evaluate(hgraph, n)) {
nodesToRemove.add(n);
break;
}
}
}
for (Node n : nodesToRemove) {
hgraph.removeNode(n);
}
for (NodeFilter nf : nodeFilters) {
nf.finish();
}
}
if (edgeFilters.size() > 0) {
for (Iterator<EdgeFilter> itr = edgeFilters.iterator(); itr.hasNext(); ) {
EdgeFilter ef = itr.next();
if (!ef.init(hgraph)) {
itr.remove();
}
}
List<Edge> edgesToRemove = new ArrayList<Edge>();
for (Edge e : hgraph.getEdges()) {
for (EdgeFilter ef : edgeFilters) {
if (!ef.evaluate(hgraph, e)) {
edgesToRemove.add(e);
break;
}
}
}
for (Edge e : edgesToRemove) {
hgraph.removeEdge(e);
}
for (EdgeFilter ef : edgeFilters) {
ef.finish();
}
}
return hgraph;
}