Introducing concept of a physical or logical region to facilitate
support of geographically distributed cluster and to lay ground
for multiple/filtered topology layouts.
Added implementation of manager and store; unit-tests included.
Change-Id: Ia01673a0b711b8785c0ea68768552c2f61d7ea6d
diff --git a/utils/misc/src/main/java/org/onlab/util/Identifier.java b/utils/misc/src/main/java/org/onlab/util/Identifier.java
new file mode 100644
index 0000000..7fcfcfe
--- /dev/null
+++ b/utils/misc/src/main/java/org/onlab/util/Identifier.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2014-2016 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.onlab.util;
+
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Abstract identifier backed by another value, e.g. string, int.
+ */
+public class Identifier<T> {
+
+ protected final T identifier; // backing identifier value
+
+ /**
+ * Constructor for serialization.
+ */
+ protected Identifier() {
+ this.identifier = null;
+ }
+
+ /**
+ * Constructs an identifier backed by the specified value.
+ *
+ * @param value the backing value
+ */
+ protected Identifier(T value) {
+ this.identifier = checkNotNull(value, "Identifier cannot be null.");
+ }
+
+ /**
+ * Returns the backing identifier value.
+ *
+ * @return identifier
+ */
+ public T id() {
+ return identifier;
+ }
+
+ /**
+ * Returns the hashcode of the identifier.
+ *
+ * @return hashcode
+ */
+ @Override
+ public int hashCode() {
+ return identifier.hashCode();
+ }
+
+ /**
+ * Compares two device key identifiers for equality.
+ *
+ * @param obj to compare against
+ * @return true if the objects are equal, false otherwise.
+ */
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj instanceof Identifier) {
+ Identifier that = (Identifier) obj;
+ return this.getClass() == that.getClass() &&
+ Objects.equals(this.identifier, that.identifier);
+ }
+ return false;
+ }
+
+ /**
+ * Returns a string representation of a DeviceKeyId.
+ *
+ * @return string
+ */
+ public String toString() {
+ return identifier.toString();
+ }
+
+}
diff --git a/utils/misc/src/test/java/org/onlab/util/IdentifierTest.java b/utils/misc/src/test/java/org/onlab/util/IdentifierTest.java
new file mode 100644
index 0000000..dda556e
--- /dev/null
+++ b/utils/misc/src/test/java/org/onlab/util/IdentifierTest.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2014-2016 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.onlab.util;
+
+import com.google.common.testing.EqualsTester;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Test of the base identifier.
+ */
+public class IdentifierTest {
+
+ @Test
+ public void basics() {
+ FooId id = new FooId(123);
+ assertEquals("incorrect value", 123, (int) id.id());
+ }
+
+ @Test
+ public void equality() {
+ FooId a = new FooId(1);
+ FooId b = new FooId(1);
+ FooId c = new FooId(2);
+ new EqualsTester().addEqualityGroup(a, b).addEqualityGroup(c).testEquals();
+ }
+
+ static class FooId extends Identifier<Integer> {
+ FooId(int id) {
+ super(id);
+ }
+ }
+
+}
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