Sketching more topology related stuff.
Added overview.html for Java API docs.
diff --git a/net/api/src/main/java/org/onlab/onos/net/topology/DefaultTopologyCluster.java b/net/api/src/main/java/org/onlab/onos/net/topology/DefaultTopologyCluster.java
new file mode 100644
index 0000000..f33dcf7
--- /dev/null
+++ b/net/api/src/main/java/org/onlab/onos/net/topology/DefaultTopologyCluster.java
@@ -0,0 +1,81 @@
+package org.onlab.onos.net.topology;
+
+import org.onlab.onos.net.DeviceId;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Default implementation of a network topology cluster.
+ */
+public class DefaultTopologyCluster implements TopologyCluster {
+
+ private final ClusterId id;
+ private final int deviceCount;
+ private final int linkCount;
+ private final DeviceId root;
+
+ /**
+ * Creates a new topology cluster descriptor with the specified attributes.
+ *
+ * @param id cluster id
+ * @param deviceCount number of devices in the cluster
+ * @param linkCount number of links in the cluster
+ * @param root cluster root node
+ */
+ public DefaultTopologyCluster(ClusterId id, int deviceCount, int linkCount,
+ DeviceId root) {
+ this.id = id;
+ this.deviceCount = deviceCount;
+ this.linkCount = linkCount;
+ this.root = root;
+ }
+
+ @Override
+ public ClusterId id() {
+ return id;
+ }
+
+ @Override
+ public int deviceCount() {
+ return deviceCount;
+ }
+
+ @Override
+ public int linkCount() {
+ return linkCount;
+ }
+
+ @Override
+ public DeviceId root() {
+ return root;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(id, deviceCount, linkCount, root);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (obj instanceof DefaultTopologyCluster) {
+ final DefaultTopologyCluster other = (DefaultTopologyCluster) obj;
+ return Objects.equals(this.id, other.id) &&
+ Objects.equals(this.deviceCount, other.deviceCount) &&
+ Objects.equals(this.linkCount, other.linkCount) &&
+ Objects.equals(this.root, other.root);
+ }
+ return false;
+ }
+
+ @Override
+ public String toString() {
+ return toStringHelper(this)
+ .add("id", id)
+ .add("deviceCount", deviceCount)
+ .add("linkCount", linkCount)
+ .add("root", root)
+ .toString();
+ }
+}