Implement IntentInstallers

IntentInstallers for:
- PathFlowIntent
- SingleDstTreeFlowIntent
- SingleSrcTreeFlowIntent

This resolves ONOS-1884, ONOS-1885, and ONOS-1886.

Change-Id: Ie0eac4bab9a2898b582edf2e4291498f0a583d71
diff --git a/src/main/java/net/onrc/onos/core/newintent/SingleSrcTreeFlowIntentInstaller.java b/src/main/java/net/onrc/onos/core/newintent/SingleSrcTreeFlowIntentInstaller.java
new file mode 100644
index 0000000..38aec87
--- /dev/null
+++ b/src/main/java/net/onrc/onos/core/newintent/SingleSrcTreeFlowIntentInstaller.java
@@ -0,0 +1,31 @@
+package net.onrc.onos.core.newintent;
+
+import net.onrc.onos.api.flowmanager.FlowManagerService;
+
+/**
+ * An intent installer for {@link SingleSrcTreeFlowIntent}.
+ */
+public class SingleSrcTreeFlowIntentInstaller
+        extends AbstractIntentInstaller<SingleSrcTreeFlowIntent> {
+
+    /**
+     * Constructs an intent installer for {@link SingleSrcTreeFlowIntent}
+     * with the specified Flow Manager service, which is used in this class.
+     *
+     * @param flowManager Flow Manager service, which is used
+     *                    to install/remove an intent
+     */
+    public SingleSrcTreeFlowIntentInstaller(FlowManagerService flowManager) {
+        super(flowManager);
+    }
+
+    @Override
+    public void install(SingleSrcTreeFlowIntent intent) {
+        installFlow(intent, intent.getTree());
+    }
+
+    @Override
+    public void remove(SingleSrcTreeFlowIntent intent) {
+        removeFlow(intent, intent.getTree());
+    }
+}