Consolidating null providers and making them fully configurable and integrated with the ConfigProvider to allow arbitrary topologies.

Change-Id: I899e27a9771af4013a3ce6da7f683a4927ffb438
diff --git a/cli/src/main/java/org/onosproject/cli/AbstractChoicesCompleter.java b/cli/src/main/java/org/onosproject/cli/AbstractChoicesCompleter.java
new file mode 100644
index 0000000..b846fde
--- /dev/null
+++ b/cli/src/main/java/org/onosproject/cli/AbstractChoicesCompleter.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 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.cli;
+
+import org.apache.karaf.shell.console.completer.StringsCompleter;
+
+import java.util.List;
+import java.util.SortedSet;
+
+/**
+ * Abstraction of a completer with preset choices.
+ */
+public abstract class AbstractChoicesCompleter extends AbstractCompleter {
+
+    protected abstract List<String> choices();
+
+    @Override
+    public int complete(String buffer, int cursor, List<String> candidates) {
+        StringsCompleter delegate = new StringsCompleter();
+        SortedSet<String> strings = delegate.getStrings();
+        choices().forEach(strings::add);
+        return delegate.complete(buffer, cursor, candidates);
+    }
+
+}
diff --git a/cli/src/main/java/org/onosproject/cli/net/AbstractCompleter.java b/cli/src/main/java/org/onosproject/cli/AbstractCompleter.java
similarity index 97%
rename from cli/src/main/java/org/onosproject/cli/net/AbstractCompleter.java
rename to cli/src/main/java/org/onosproject/cli/AbstractCompleter.java
index 36c0a04..f232596 100644
--- a/cli/src/main/java/org/onosproject/cli/net/AbstractCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/AbstractCompleter.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.cli.net;
+package org.onosproject.cli;
 
 import org.apache.felix.service.command.CommandSession;
 import org.apache.karaf.shell.console.CommandSessionHolder;
diff --git a/cli/src/main/java/org/onosproject/cli/StartStopCompleter.java b/cli/src/main/java/org/onosproject/cli/StartStopCompleter.java
new file mode 100644
index 0000000..b9d9b0f
--- /dev/null
+++ b/cli/src/main/java/org/onosproject/cli/StartStopCompleter.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 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.cli;
+
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/**
+ * Start/stop command completer.
+ */
+public class StartStopCompleter extends AbstractChoicesCompleter {
+
+    public static final String START = "start";
+    public static final String STOP = "stop";
+
+    @Override
+    public List<String> choices() {
+        return ImmutableList.of(START, STOP);
+    }
+}
diff --git a/cli/src/main/java/org/onosproject/cli/UpDownCompleter.java b/cli/src/main/java/org/onosproject/cli/UpDownCompleter.java
new file mode 100644
index 0000000..9d8eda5
--- /dev/null
+++ b/cli/src/main/java/org/onosproject/cli/UpDownCompleter.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 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.cli;
+
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/**
+ * Up/down command completer.
+ */
+public class UpDownCompleter extends AbstractChoicesCompleter {
+
+    public static final String UP = "up";
+    public static final String DOWN = "down";
+
+    @Override
+    public List<String> choices() {
+        return ImmutableList.of(UP, DOWN);
+    }
+}
diff --git a/cli/src/main/java/org/onosproject/cli/app/ApplicationCommandCompleter.java b/cli/src/main/java/org/onosproject/cli/app/ApplicationCommandCompleter.java
index b9ea774..51611ff 100644
--- a/cli/src/main/java/org/onosproject/cli/app/ApplicationCommandCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/app/ApplicationCommandCompleter.java
@@ -15,30 +15,20 @@
  */
 package org.onosproject.cli.app;
 
-import org.apache.karaf.shell.console.Completer;
-import org.apache.karaf.shell.console.completer.StringsCompleter;
+import com.google.common.collect.ImmutableList;
+import org.onosproject.cli.AbstractChoicesCompleter;
 
 import java.util.List;
-import java.util.SortedSet;
 
 import static org.onosproject.cli.app.ApplicationCommand.*;
 
 /**
- * Application name completer.
+ * Application command completer.
  */
-public class ApplicationCommandCompleter implements Completer {
+public class ApplicationCommandCompleter extends AbstractChoicesCompleter {
     @Override
-    public int complete(String buffer, int cursor, List<String> candidates) {
-        // Delegate string completer
-        StringsCompleter delegate = new StringsCompleter();
-        SortedSet<String> strings = delegate.getStrings();
-        strings.add(INSTALL);
-        strings.add(UNINSTALL);
-        strings.add(ACTIVATE);
-        strings.add(DEACTIVATE);
-
-        // Now let the completer do the work for figuring out what to offer.
-        return delegate.complete(buffer, cursor, candidates);
+    public List<String> choices() {
+        return ImmutableList.of(INSTALL, UNINSTALL, ACTIVATE, DEACTIVATE);
     }
 
 }
diff --git a/cli/src/main/java/org/onosproject/cli/app/ApplicationNameCompleter.java b/cli/src/main/java/org/onosproject/cli/app/ApplicationNameCompleter.java
index e975be0..9342721 100644
--- a/cli/src/main/java/org/onosproject/cli/app/ApplicationNameCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/app/ApplicationNameCompleter.java
@@ -19,7 +19,7 @@
 import org.apache.karaf.shell.console.completer.StringsCompleter;
 import org.onosproject.app.ApplicationService;
 import org.onosproject.app.ApplicationState;
-import org.onosproject.cli.net.AbstractCompleter;
+import org.onosproject.cli.AbstractCompleter;
 import org.onosproject.core.Application;
 
 import java.util.Iterator;
diff --git a/cli/src/main/java/org/onosproject/cli/cfg/ComponentPropertyNameCompleter.java b/cli/src/main/java/org/onosproject/cli/cfg/ComponentPropertyNameCompleter.java
index 4c6e5e9..98e1969 100644
--- a/cli/src/main/java/org/onosproject/cli/cfg/ComponentPropertyNameCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/cfg/ComponentPropertyNameCompleter.java
@@ -19,7 +19,7 @@
 import org.apache.karaf.shell.console.completer.StringsCompleter;
 import org.onosproject.cfg.ComponentConfigService;
 import org.onosproject.cfg.ConfigProperty;
-import org.onosproject.cli.net.AbstractCompleter;
+import org.onosproject.cli.AbstractCompleter;
 
 import java.util.List;
 import java.util.Set;
diff --git a/cli/src/main/java/org/onosproject/cli/net/LinkDstCompleter.java b/cli/src/main/java/org/onosproject/cli/net/LinkDstCompleter.java
new file mode 100644
index 0000000..fbf116f
--- /dev/null
+++ b/cli/src/main/java/org/onosproject/cli/net/LinkDstCompleter.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2015 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.cli.net;
+
+import org.apache.karaf.shell.console.completer.ArgumentCompleter;
+import org.apache.karaf.shell.console.completer.StringsCompleter;
+import org.onosproject.cli.AbstractCompleter;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.link.LinkService;
+
+import java.util.List;
+import java.util.SortedSet;
+
+import static org.onosproject.cli.net.AddPointToPointIntentCommand.getDeviceId;
+import static org.onosproject.cli.net.AddPointToPointIntentCommand.getPortNumber;
+import static org.onosproject.net.DeviceId.deviceId;
+import static org.onosproject.net.PortNumber.portNumber;
+
+/**
+ * Link end-point completer.
+ */
+public class LinkDstCompleter extends AbstractCompleter {
+    @Override
+    public int complete(String buffer, int cursor, List<String> candidates) {
+        // Delegate string completer
+        StringsCompleter delegate = new StringsCompleter();
+
+        // Fetch our service and feed it's offerings to the string completer
+        LinkService service = AbstractShellCommand.get(LinkService.class);
+
+        // Link source the previous argument.
+        ArgumentCompleter.ArgumentList list = getArgumentList();
+        String srcArg = list.getArguments()[list.getCursorArgumentIndex() - 1];
+
+        // Generate the device ID/port number identifiers
+        SortedSet<String> strings = delegate.getStrings();
+        try {
+            ConnectPoint src = new ConnectPoint(deviceId(getDeviceId(srcArg)),
+                                                portNumber(getPortNumber(srcArg)));
+            service.getEgressLinks(src)
+                    .forEach(link -> strings.add(link.dst().elementId().toString() +
+                                                         "/" + link.dst().port()));
+        } catch (NumberFormatException e) {
+            System.err.println("Invalid connect-point");
+        }
+
+        // Now let the completer do the work for figuring out what to offer.
+        return delegate.complete(buffer, cursor, candidates);
+    }
+
+}
diff --git a/cli/src/main/java/org/onosproject/cli/net/LinkSrcCompleter.java b/cli/src/main/java/org/onosproject/cli/net/LinkSrcCompleter.java
new file mode 100644
index 0000000..dec8c6b
--- /dev/null
+++ b/cli/src/main/java/org/onosproject/cli/net/LinkSrcCompleter.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2015 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.cli.net;
+
+import org.apache.karaf.shell.console.completer.StringsCompleter;
+import org.onosproject.cli.AbstractCompleter;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.net.link.LinkService;
+
+import java.util.List;
+import java.util.SortedSet;
+
+/**
+ * Link end-point completer.
+ */
+public class LinkSrcCompleter extends AbstractCompleter {
+    @Override
+    public int complete(String buffer, int cursor, List<String> candidates) {
+        // Delegate string completer
+        StringsCompleter delegate = new StringsCompleter();
+
+        // Fetch our service and feed it's offerings to the string completer
+        LinkService service = AbstractShellCommand.get(LinkService.class);
+
+        // Generate the device ID/port number identifiers
+        SortedSet<String> strings = delegate.getStrings();
+        service.getLinks()
+                .forEach(link -> strings.add(link.src().elementId().toString() +
+                                                     "/" + link.src().port()));
+
+        // Now let the completer do the work for figuring out what to offer.
+        return delegate.complete(buffer, cursor, candidates);
+    }
+
+}
diff --git a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index 047016c..0b43f5f 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -332,4 +332,7 @@
     <bean id="ipProtocolCompleter" class="org.onosproject.cli.net.IpProtocolCompleter"/>
     <bean id="driverNameCompleter" class="org.onosproject.cli.net.DriverNameCompleter"/>
 
+    <bean id="startStopCompleter" class="org.onosproject.cli.StartStopCompleter"/>
+    <bean id="upDownCompleter" class="org.onosproject.cli.UpDownCompleter"/>
+
 </blueprint>