Renamed Trie to Tree for consistency.

This is in the context of SDN-IP's patricia tree.

Change-Id: I59437fb49580aba01a287e9bc0bf035c093c7b95
diff --git a/src/main/java/net/onrc/onos/apps/bgproute/BgpRoute.java b/src/main/java/net/onrc/onos/apps/bgproute/BgpRoute.java
index 8f42605..ed70ae4 100644
--- a/src/main/java/net/onrc/onos/apps/bgproute/BgpRoute.java
+++ b/src/main/java/net/onrc/onos/apps/bgproute/BgpRoute.java
@@ -84,8 +84,8 @@
     private IRestApiService restApi;
     private IProxyArpService proxyArp;
 
-    private IPatriciaTrie<RibEntry> ptree;
-    private IPatriciaTrie<Interface> interfacePtrie;
+    private IPatriciaTree<RibEntry> ptree;
+    private IPatriciaTree<Interface> interfacePtree;
     private BlockingQueue<RibUpdate> ribUpdates;
 
     private String bgpdRestIp;
@@ -222,10 +222,10 @@
             throw new ConfigurationRuntimeException("Error in JSON file", e);
         }
 
-        // Populate the interface Patricia Trie
+        // Populate the interface Patricia Tree
         for (Interface intf : interfaces.values()) {
             Prefix prefix = new Prefix(intf.getIpAddress().getAddress(), intf.getPrefixLength());
-            interfacePtrie.put(prefix, intf);
+            interfacePtree.put(prefix, intf);
         }
     }
 
@@ -260,8 +260,8 @@
     public void init(FloodlightModuleContext context)
             throws FloodlightModuleException {
 
-        ptree = new PatriciaTrie<RibEntry>(32);
-        interfacePtrie = new PatriciaTrie<Interface>(32);
+        ptree = new PatriciaTree<RibEntry>(32);
+        interfacePtree = new PatriciaTree<Interface>(32);
 
         ribUpdates = new LinkedBlockingQueue<RibUpdate>();
 
@@ -327,13 +327,13 @@
     }
 
     @Override
-    public IPatriciaTrie<RibEntry> getPtree() {
+    public IPatriciaTree<RibEntry> getPtree() {
         return ptree;
     }
 
     @Override
     public void clearPtree() {
-        ptree = new PatriciaTrie<RibEntry>(32);
+        ptree = new PatriciaTree<RibEntry>(32);
     }
 
     @Override
@@ -466,7 +466,7 @@
         } else {
             //Route to non-peer
             log.debug("Route to non-peer {}", dstIpAddress);
-            egressInterface = interfacePtrie.match(
+            egressInterface = interfacePtree.match(
                     new Prefix(dstIpAddress.getAddress(), 32));
             if (egressInterface == null) {
                 log.warn("No outgoing interface found for {}", dstIpAddress.getHostAddress());
@@ -596,7 +596,7 @@
 
             if (ptree.remove(prefix, update.getRibEntry())) {
                 /*
-                 * Only delete flows if an entry was actually removed from the trie.
+                 * Only delete flows if an entry was actually removed from the tree.
                  * If no entry was removed, the <prefix, nexthop> wasn't there so
                  * it's probably already been removed and we don't need to do anything
                  */
@@ -1363,13 +1363,13 @@
 
     @Override
     public boolean isInterfaceAddress(InetAddress address) {
-        Interface intf = interfacePtrie.match(new Prefix(address.getAddress(), 32));
+        Interface intf = interfacePtree.match(new Prefix(address.getAddress(), 32));
         return (intf != null && intf.getIpAddress().equals(address));
     }
 
     @Override
     public boolean inConnectedNetwork(InetAddress address) {
-        Interface intf = interfacePtrie.match(new Prefix(address.getAddress(), 32));
+        Interface intf = interfacePtree.match(new Prefix(address.getAddress(), 32));
         return (intf != null && !intf.getIpAddress().equals(address));
     }
 
@@ -1385,7 +1385,7 @@
 
     @Override
     public Interface getOutgoingInterface(InetAddress dstIpAddress) {
-        return interfacePtrie.match(new Prefix(dstIpAddress.getAddress(), 32));
+        return interfacePtree.match(new Prefix(dstIpAddress.getAddress(), 32));
     }
 
     @Override
diff --git a/src/main/java/net/onrc/onos/apps/bgproute/BgpRouteResource.java b/src/main/java/net/onrc/onos/apps/bgproute/BgpRouteResource.java
index 9dd4b9b..1b20449 100644
--- a/src/main/java/net/onrc/onos/apps/bgproute/BgpRouteResource.java
+++ b/src/main/java/net/onrc/onos/apps/bgproute/BgpRouteResource.java
@@ -32,14 +32,14 @@
                 get(IBgpRouteService.class.getCanonicalName());
 
         if (dest == null) {
-            IPatriciaTrie<RibEntry> ptree = bgpRoute.getPtree();
+            IPatriciaTree<RibEntry> ptree = bgpRoute.getPtree();
             output.append("{\n  \"rib\": [\n");
             boolean printed = false;
 
             synchronized (ptree) {
-                Iterator<IPatriciaTrie.Entry<RibEntry>> it = ptree.iterator();
+                Iterator<IPatriciaTree.Entry<RibEntry>> it = ptree.iterator();
                 while (it.hasNext()) {
-                    IPatriciaTrie.Entry<RibEntry> entry = it.next();
+                    IPatriciaTree.Entry<RibEntry> entry = it.next();
 
                     if (printed) {
                         output.append(",\n");
diff --git a/src/main/java/net/onrc/onos/apps/bgproute/IBgpRouteService.java b/src/main/java/net/onrc/onos/apps/bgproute/IBgpRouteService.java
index fa2d3fc..effc81b 100644
--- a/src/main/java/net/onrc/onos/apps/bgproute/IBgpRouteService.java
+++ b/src/main/java/net/onrc/onos/apps/bgproute/IBgpRouteService.java
@@ -15,7 +15,7 @@
      *
      * @return the PATRICIA tree.
      */
-    public IPatriciaTrie<RibEntry> getPtree();
+    public IPatriciaTree<RibEntry> getPtree();
 
     /**
      * Gets the IP address of REST server on the BGPd side. This is used to
diff --git a/src/main/java/net/onrc/onos/apps/bgproute/IPatriciaTrie.java b/src/main/java/net/onrc/onos/apps/bgproute/IPatriciaTree.java
similarity index 95%
rename from src/main/java/net/onrc/onos/apps/bgproute/IPatriciaTrie.java
rename to src/main/java/net/onrc/onos/apps/bgproute/IPatriciaTree.java
index 32a7d2e..1ef9eae 100644
--- a/src/main/java/net/onrc/onos/apps/bgproute/IPatriciaTrie.java
+++ b/src/main/java/net/onrc/onos/apps/bgproute/IPatriciaTree.java
@@ -13,15 +13,15 @@
  * {@code <prefix, next_hop>},
  * e.g. {@code <192.168.1.0/24, 10.0.0.1>}
  * <p/>
- * These updates are stored in the patricia trie, which acts as a map from
+ * These updates are stored in the patricia tree, which acts as a map from
  * {@code prefix} to {@code next_hop}. {@code next_hop} values can be looked up
  * by prefix.
  *
  * @param <V> The class of the data to stored in the patricia tree
  *
- * @see <a href="http://en.wikipedia.org/wiki/Patricia_trie">Patricia tree</a>
+ * @see <a href="http://en.wikipedia.org/wiki/Patricia_tree">Patricia tree</a>
  */
-public interface IPatriciaTrie<V> {
+public interface IPatriciaTree<V> {
     /**
      * Puts a new mapping into the patricia tree.
      *
diff --git a/src/main/java/net/onrc/onos/apps/bgproute/PatriciaTrie.java b/src/main/java/net/onrc/onos/apps/bgproute/PatriciaTree.java
similarity index 96%
rename from src/main/java/net/onrc/onos/apps/bgproute/PatriciaTrie.java
rename to src/main/java/net/onrc/onos/apps/bgproute/PatriciaTree.java
index 0c64502..3a6a46c 100644
--- a/src/main/java/net/onrc/onos/apps/bgproute/PatriciaTrie.java
+++ b/src/main/java/net/onrc/onos/apps/bgproute/PatriciaTree.java
@@ -4,12 +4,12 @@
 import java.util.NoSuchElementException;
 
 /**
- * Implements a patricia tree. See {@link IPatriciaTrie} for a description of
+ * Implements a patricia tree. See {@link IPatriciaTree} for a description of
  * how the tree works and its usage.
  *
  * @param <V> the type of objects that will be stored in the tree
  */
-public class PatriciaTrie<V> implements IPatriciaTrie<V> {
+public class PatriciaTree<V> implements IPatriciaTree<V> {
     private final byte[] maskBits = {(byte) 0x00, (byte) 0x80, (byte) 0xc0, (byte) 0xe0, (byte) 0xf0,
             (byte) 0xf8, (byte) 0xfc, (byte) 0xfe, (byte) 0xff};
 
@@ -25,7 +25,7 @@
      *
      * @param maxPrefixLength the maximum length of prefixes
      */
-    public PatriciaTrie(int maxPrefixLength) {
+    public PatriciaTree(int maxPrefixLength) {
         this.maxPrefixLength = maxPrefixLength;
     }
 
@@ -224,7 +224,7 @@
 
     @Override
     public Iterator<Entry<V>> iterator() {
-        return new PatriciaTrieIterator(top);
+        return new PatriciaTreeIterator(top);
     }
 
     private Node findNode(Prefix prefix) {
@@ -361,7 +361,7 @@
         //Creating a new Prefix with a prefix length of common_len
         //Bits are copied from node's up until the common_len'th bit
         //RibEntry is null, because this is an aggregate prefix - it's not
-        //actually been added to the trie.
+        //actually been added to the tree.
 
         byte[] newPrefix = new byte[getByteContainingBit(maxPrefixLength)];
 
@@ -401,15 +401,15 @@
         }
 
         public Entry<V> getEntry() {
-            return new PatriciaTrieEntry(prefix, value);
+            return new PatriciaTreeEntry(prefix, value);
         }
     }
 
-    private class PatriciaTrieEntry implements Entry<V> {
+    private class PatriciaTreeEntry implements Entry<V> {
         private final Prefix prefix;
         private final V value;
 
-        public PatriciaTrieEntry(Prefix prefix, V value) {
+        public PatriciaTreeEntry(Prefix prefix, V value) {
             this.prefix = prefix;
             this.value = value;
         }
@@ -425,11 +425,11 @@
         }
     }
 
-    private class PatriciaTrieIterator implements Iterator<Entry<V>> {
+    private class PatriciaTreeIterator implements Iterator<Entry<V>> {
         private Node current;
         private boolean started; // initialized to false
 
-        public PatriciaTrieIterator(Node start) {
+        public PatriciaTreeIterator(Node start) {
             current = start;
 
             //If the start is an aggregate node fast forward to find the next valid node
diff --git a/src/main/java/net/onrc/onos/apps/bgproute/RibEntry.java b/src/main/java/net/onrc/onos/apps/bgproute/RibEntry.java
index 7ad1d3d..2392e01 100644
--- a/src/main/java/net/onrc/onos/apps/bgproute/RibEntry.java
+++ b/src/main/java/net/onrc/onos/apps/bgproute/RibEntry.java
@@ -19,8 +19,8 @@
     /*
      * Store the sequence number information provided on the update here for
      * now. I think this *should* really be in the RibUpdate, and we should
-     * store RibUpdates in the Ptrie. But, that's a bigger change to change
-     * what the Ptrie stores.
+     * store RibUpdates in the Ptree. But, that's a bigger change to change
+     * what the Ptree stores.
      */
     private final long sysUpTime;
     private final long sequenceNum;