remove usage of apache commons collections

src/main/java/n10s/result/VirtualPath.java

@@ -1,6 +1,5 @@
 package n10s.result;
 
-import org.apache.commons.collections.CollectionUtils;
 import org.neo4j.graphdb.*;
 import org.neo4j.graphdb.traversal.Paths;
 
@@ -10,9 +9,6 @@
 import java.util.concurrent.atomic.AtomicReference;
 
 
-//import static org.apache.commons.collections4.IterableUtils.reversedIterable;
-
-
 public class VirtualPath implements Path {
   private final Node start;
   private final List<Relationship> relationships;
@@ -124,36 +120,31 @@ public String toString() {
 
   private void requireConnected(Relationship relationship) {
     final List<Node> previousNodes = getPreviousNodes();
-    boolean isRelConnectedToPrevious = CollectionUtils.containsAny( previousNodes, Arrays.asList(relationship.getNodes()) );
+    boolean isRelConnectedToPrevious = containsAny( previousNodes, Arrays.asList(relationship.getNodes()));
     if (!isRelConnectedToPrevious) {
       throw new IllegalArgumentException("Relationship is not part of current path.");
     }
   }
 
+    public static boolean containsAny(Collection<?> coll1, Collection<?> coll2) {
+      if (coll1 == null || coll2 == null) {
+        return false;
+      }
+
+      for (Object obj : coll1) {
+        if (coll2.contains(obj)) {
+          return true;
+        }
+      }
+
+      return false;
+    }
+
   private List<Node> getPreviousNodes() {
     Relationship previousRelationship = lastRelationship();
     if (previousRelationship != null) {
       return Arrays.asList(previousRelationship.getNodes());
     }
     return List.of(endNode());
   }
-
-  public static final class Builder {
-    private final Node start;
-    private final List<Relationship> relationships = new ArrayList<>();
-
-    public Builder(Node start) {
-      this.start = start;
-    }
-
-    public Builder push(Relationship relationship) {
-      this.relationships.add(relationship);
-      return this;
-    }
-
-    public VirtualPath build() {
-      return new VirtualPath(start, relationships);
-    }
-
-  }
 }

src/main/java/n10s/similarity/Similarities.java

@@ -194,8 +194,7 @@ public Stream<SemanticSearchResult> lchSimSearch(@Name("node1") Node elem1, @Nam
         Long worst_case_total_depth = (Long) tx.execute(String.format(globalMaxDepthQuery, subclassOfRel), queryParams).next().get("len");
 
         queryParams.put("threshold_length", ((2.0 *  worst_case_total_depth)/ Math.pow(10,minSim)));
-        //TODO: THIS IS NOT EFFICIENT: EXTRACT THE DEPTH COMPUTATION AND CACHE
-        System.out.println(String.format(shortestPathSearchWithMaxDepth, classLabel, subclassOfRel));
+        //TODO: MAKE THIS MORE EFFICIENT: EXTRACT THE DEPTH COMPUTATION AND CACHE
         return tx.execute(String.format(shortestPathSearchWithMaxDepth, classLabel, subclassOfRel), queryParams).stream().map(SemanticSearchResult::new);
     }