v0.2.54..v0.2.55 changeset Way.h

diff --git a/hoot-core/src/main/cpp/hoot/core/elements/Way.h b/hoot-core/src/main/cpp/hoot/core/elements/Way.h
index 74cb24a..d9d1269 100644
--- a/hoot-core/src/main/cpp/hoot/core/elements/Way.h
+++ b/hoot-core/src/main/cpp/hoot/core/elements/Way.h
@@ -104,7 +104,8 @@ public:
   /**
    * Returns the same result as getEnvelopeInternal, but copied so the caller gets ownership.
    */
-  virtual geos::geom::Envelope* getEnvelope(const std::shared_ptr<const ElementProvider>& ep) const override
+  virtual geos::geom::Envelope* getEnvelope(
+    const std::shared_ptr<const ElementProvider>& ep) const override
   { return new geos::geom::Envelope(getEnvelopeInternal(ep)); }
 
   /**
@@ -121,9 +122,17 @@ public:
   int getNodeIndex(long nodeId) const;
 
   long getFirstNodeId() const { return getNodeId(0); }
-
   long getLastNodeId() const { return getNodeId(getNodeCount() - 1); }
 
+  /**
+   * Determines if an index is the first or las
+   *
+   * @param index index to examine
+   * @return true if the index is extreme; false otherwise
+   */
+  bool isExtremeIndex(const int index) const
+  { return index == 0 || index == (int)getNodeCount() - 1; }
+
   size_t getNodeCount() const { return _wayData->getNodeIds().size(); }
 
   long getNodeId(int index) const { return _wayData->getNodeIds()[index]; }
@@ -181,13 +190,28 @@ public:
   void reverseOrder();
 
   /**
-   * Determines if two ways have the same node IDs
+   * Determines if two ways have the same nodes
+   *
+   * @param other way to compare with
+   * @return true if the other way has the same nodes in the same order as this way; false otherwise
+   */
+  bool hasSameNodes(const Way& other) const;
+
+  /**
+   * Determines if two ways share the same node
    *
-   * @param other way to compare node IDs with
-   * @return true if the other way has the same node IDs in the same order as this way; false
-   * otherwise
+   * @param other way to compare with
+   * @return true if the other way shares at least one node with this way; false otherwise
    */
-  bool hasSameNodeIds(const Way& other) const;
+  bool hasSharedNode(const Way& other) const;
+
+  /**
+   * Retrieves the IDs of shared nodes between two ways
+   *
+   * @param other way to compare with
+   * @return a collection of node IDs
+   */
+  QSet<long> sharedNodeIds(const Way& other) const;
 
   /**
    * This is rarely used. Primarily it is useful when loading the way from a file that does
@@ -198,7 +222,6 @@ public:
   QString toString() const;
 
   virtual void visitRo(const ElementProvider& map, ConstElementVisitor& filter) const;
-
   virtual void visitRw(ElementProvider& map, ConstElementVisitor& filter);
 
   /**