ONOS-1066: Move IntentCompilers to the dedicated package
Change-Id: I3e588cab0559093d389c9d44d2c7df536cabe953
diff --git a/core/net/src/main/java/org/onosproject/net/intent/impl/compiler/MultiPointToSinglePointIntentCompiler.java b/core/net/src/main/java/org/onosproject/net/intent/impl/compiler/MultiPointToSinglePointIntentCompiler.java
new file mode 100644
index 0000000..c016f41
--- /dev/null
+++ b/core/net/src/main/java/org/onosproject/net/intent/impl/compiler/MultiPointToSinglePointIntentCompiler.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2014 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.net.intent.impl.compiler;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Link;
+import org.onosproject.net.Path;
+import org.onosproject.net.intent.Intent;
+import org.onosproject.net.intent.IntentCompiler;
+import org.onosproject.net.intent.IntentExtensionService;
+import org.onosproject.net.intent.LinkCollectionIntent;
+import org.onosproject.net.intent.MultiPointToSinglePointIntent;
+import org.onosproject.net.intent.PointToPointIntent;
+import org.onosproject.net.intent.impl.PathNotFoundException;
+import org.onosproject.net.resource.LinkResourceAllocations;
+import org.onosproject.net.topology.PathService;
+
+import com.google.common.collect.Sets;
+
+/**
+ * An intent compiler for
+ * {@link org.onosproject.net.intent.MultiPointToSinglePointIntent}.
+ */
+@Component(immediate = true)
+public class MultiPointToSinglePointIntentCompiler
+ implements IntentCompiler<MultiPointToSinglePointIntent> {
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected IntentExtensionService intentManager;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected PathService pathService;
+
+ @Activate
+ public void activate() {
+ intentManager.registerCompiler(MultiPointToSinglePointIntent.class, this);
+ }
+
+ @Deactivate
+ public void deactivate() {
+ intentManager.unregisterCompiler(PointToPointIntent.class);
+ }
+
+ @Override
+ public List<Intent> compile(MultiPointToSinglePointIntent intent, List<Intent> installable,
+ Set<LinkResourceAllocations> resources) {
+ Map<DeviceId, Link> links = new HashMap<>();
+
+ for (ConnectPoint ingressPoint : intent.ingressPoints()) {
+ Path path = getPath(ingressPoint, intent.egressPoint());
+ for (Link link : path.links()) {
+ if (links.containsKey(link.src().deviceId())) {
+ // We've already reached the existing tree with the first
+ // part of this path. Don't add the remainder of the path
+ // in case it differs from the path we already have.
+ break;
+ }
+
+ links.put(link.src().deviceId(), link);
+ }
+ }
+
+ Intent result = new LinkCollectionIntent(intent.appId(),
+ intent.selector(), intent.treatment(),
+ Sets.newHashSet(links.values()), intent.egressPoint());
+ return Arrays.asList(result);
+ }
+
+ /**
+ * Computes a path between two ConnectPoints.
+ *
+ * @param one start of the path
+ * @param two end of the path
+ * @return Path between the two
+ * @throws org.onosproject.net.intent.impl.PathNotFoundException if a path cannot be found
+ */
+ private Path getPath(ConnectPoint one, ConnectPoint two) {
+ Set<Path> paths = pathService.getPaths(one.deviceId(), two.deviceId());
+ if (paths.isEmpty()) {
+ throw new PathNotFoundException(one.elementId(), two.elementId());
+ }
+ // TODO: let's be more intelligent about this eventually
+ return paths.iterator().next();
+ }
+}