Merge branch 'master' of ssh://gerrit.onlab.us:29418/onos-next
better with files
Change-Id: Ifb62a2c9a8e394fe3190582d7236eaea942ee3fc
diff --git a/core/api/src/main/java/org/onlab/onos/ApplicationId.java b/core/api/src/main/java/org/onlab/onos/ApplicationId.java
new file mode 100644
index 0000000..f345607
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/ApplicationId.java
@@ -0,0 +1,59 @@
+package org.onlab.onos;
+
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * Application id generator class.
+ */
+public final class ApplicationId {
+
+ private static AtomicInteger idDispenser;
+ private final Integer id;
+
+ // Ban public construction
+ private ApplicationId(Integer id) {
+ this.id = id;
+ }
+
+ public Integer id() {
+ return id;
+ }
+
+ public static ApplicationId valueOf(Integer id) {
+ return new ApplicationId(id);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(id);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null) {
+ return false;
+ }
+ if (!(obj instanceof ApplicationId)) {
+ return false;
+ }
+ ApplicationId other = (ApplicationId) obj;
+ return Objects.equals(this.id, other.id);
+ }
+
+ /**
+ * Returns a new application id.
+ *
+ * @return app id
+ */
+ public static ApplicationId getAppId() {
+ if (ApplicationId.idDispenser == null) {
+ ApplicationId.idDispenser = new AtomicInteger(1);
+ }
+ return new ApplicationId(ApplicationId.idDispenser.getAndIncrement());
+ }
+
+}