Adding Key class for intents
Change-Id: Ib6e586bcc938e062de0b1d6c92e3b885334a4769
diff --git a/core/api/src/main/java/org/onosproject/net/intent/Key.java b/core/api/src/main/java/org/onosproject/net/intent/Key.java
new file mode 100644
index 0000000..eb3c4f8
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/intent/Key.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2015 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;
+
+import com.google.common.hash.HashFunction;
+import com.google.common.hash.Hashing;
+import org.onosproject.core.ApplicationId;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
+/**
+ * Key class for Intents.
+ */
+// TODO maybe pull this up to utils
+// TODO need to make this classes kryo serializable
+public class Key {
+
+ private final long hash;
+ private static final HashFunction HASH_FN = Hashing.md5();
+
+ private Key(long hash) {
+ this.hash = hash;
+ }
+
+ public long hash() {
+ return hash;
+ }
+
+ public static Key of(String key, ApplicationId appId) {
+ return new StringKey(key, appId);
+ }
+
+ public static Key of(long key, ApplicationId appId) {
+ return new LongKey(key, appId);
+ }
+
+ private final static class StringKey extends Key {
+
+ private final ApplicationId appId;
+ private final String key;
+
+ private StringKey(String key, ApplicationId appId) {
+ super(HASH_FN.newHasher()
+ .putShort(appId.id())
+ .putString(key, StandardCharsets.UTF_8)
+ .hash().asLong());
+ this.key = key;
+ this.appId = appId;
+ }
+
+ @Override
+ public String toString() {
+ return key;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(key);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null || getClass() != obj.getClass()) {
+ return false;
+ }
+ final StringKey other = (StringKey) obj;
+ return this.hash() == other.hash() &&
+ Objects.equals(this.appId, other.appId) &&
+ Objects.equals(this.key, other.key);
+ }
+ }
+
+ private final static class LongKey extends Key {
+
+ private final ApplicationId appId;
+ private static long key;
+
+ private LongKey(long key, ApplicationId appId) {
+ super(HASH_FN.newHasher()
+ .putShort(appId.id())
+ .putLong(key)
+ .hash().asLong());
+ this.key = key;
+ this.appId = appId;
+ }
+
+ @Override
+ public String toString() {
+ return Long.toString(key);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(key);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null || getClass() != obj.getClass()) {
+ return false;
+ }
+ final LongKey other = (LongKey) obj;
+ return Objects.equals(this.appId, other.appId) &&
+ this.key == other.key;
+ }
+
+ }
+}
+
+