Added application ID store; both trivial and distributed variants.
diff --git a/core/api/src/main/java/org/onlab/onos/core/DefaultApplicationId.java b/core/api/src/main/java/org/onlab/onos/core/DefaultApplicationId.java
new file mode 100644
index 0000000..b5ecccc
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/core/DefaultApplicationId.java
@@ -0,0 +1,64 @@
+package org.onlab.onos.core;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Application identifier.
+ */
+public class DefaultApplicationId implements ApplicationId {
+
+ private final short id;
+ private final String name;
+
+ /**
+ * Creates a new application ID.
+ *
+ * @param id application identifier
+ * @param name application name
+ */
+ public DefaultApplicationId(Short id, String name) {
+ this.id = id;
+ this.name = name;
+ }
+
+ // Constructor for serializers.
+ private DefaultApplicationId() {
+ this.id = 0;
+ this.name = null;
+ }
+
+ @Override
+ public short id() {
+ return id;
+ }
+
+ @Override
+ public String name() {
+ return name;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(id);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj instanceof DefaultApplicationId) {
+ DefaultApplicationId other = (DefaultApplicationId) obj;
+ return Objects.equals(this.id, other.id);
+ }
+ return false;
+ }
+
+ @Override
+ public String toString() {
+ return toStringHelper(this).add("id", id).add("name", name).toString();
+ }
+
+}