[ONOS-4160] pce rest and cli

Change-Id: Icc1ec3070fe595bfc1439048234d6a6f23127c13
diff --git a/apps/pce/src/main/java/org/onosproject/pce/cli/PceQueryPathCommand.java b/apps/pce/src/main/java/org/onosproject/pce/cli/PceQueryPathCommand.java
new file mode 100644
index 0000000..b7dc3a9
--- /dev/null
+++ b/apps/pce/src/main/java/org/onosproject/pce/cli/PceQueryPathCommand.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.pce.cli;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import org.apache.karaf.shell.commands.Command;
+import org.apache.karaf.shell.commands.Option;
+
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.incubator.net.tunnel.Tunnel;
+import org.onosproject.net.AnnotationKeys;
+import org.onosproject.pce.pceservice.api.PceService;
+
+import org.slf4j.Logger;
+
+/**
+ * Supports quering PCE path.
+ */
+@Command(scope = "onos", name = "pce-query-path",
+        description = "Supports querying PCE path.")
+public class PceQueryPathCommand extends AbstractShellCommand {
+    private final Logger log = getLogger(getClass());
+
+    @Option(name = "-i", aliases = "--id", description = "path-id", required = false,
+            multiValued = false)
+    String id = null;
+
+    @Override
+    protected void execute() {
+        log.info("executing pce-query-path");
+
+        PceService service = get(PceService.class);
+        if (null == id) {
+            //TODO: need to uncomment below line once queryAllPath method is added to PceService
+            Iterable<Tunnel> tunnels = null; // = service.queryAllPath();
+            if (tunnels != null) {
+                for (final Tunnel tunnel : tunnels) {
+                    display(tunnel);
+                }
+            } else {
+                print("No path is found.");
+                return;
+            }
+        } else {
+            //TODO: need to uncomment below line once queryPath method is added to PceService
+            Tunnel tunnel = null; // = service.queryPath(PcePathId.of(id));
+            if (tunnel == null) {
+                print("Path doesnot exists.");
+                return;
+            }
+            display(tunnel);
+        }
+    }
+
+    /**
+     * Display tunnel information on the terminal.
+     *
+     * @param tunnel pce tunnel
+     */
+    void display(Tunnel tunnel) {
+        print("\npath-id            : %d \n" +
+                "source             : %s \n" +
+                "destination        : %s \n" +
+                "path-type          : %d \n" +
+                "symbolic-path-name : %s \n" +
+                "constraints:            \n" +
+                "   cost            : %d \n" +
+                "   bandwidth       : %.2f",
+                tunnel.tunnelId().id(), tunnel.src().toString(), tunnel.dst().toString(),
+                tunnel.type(), tunnel.tunnelName(), tunnel.path().cost(),
+                tunnel.annotations().value(AnnotationKeys.BANDWIDTH));
+    }
+}