1 files changed, 132 insertions, 0 deletions
diff --git a/framework/src/onos/protocols/openflow/api/src/main/java/org/onosproject/openflow/controller/Dpid.java b/framework/src/onos/protocols/openflow/api/src/main/java/org/onosproject/openflow/controller/Dpid.java
new file mode 100644
index 00000000..6e0f65be
--- /dev/null
+++ b/framework/src/onos/protocols/openflow/api/src/main/java/org/onosproject/openflow/controller/Dpid.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2014 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.openflow.controller;
+
+import org.projectfloodlight.openflow.util.HexString;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static org.onlab.util.Tools.fromHex;
+import static org.onlab.util.Tools.toHex;
+
+/**
+ * The class representing a network switch DPID.
+ * This class is immutable.
+ */
+public final class Dpid {
+
+    private static final String SCHEME = "of";
+    private static final long UNKNOWN = 0;
+    private final long value;
+
+    /**
+     * Default constructor.
+     */
+    public Dpid() {
+        this.value = Dpid.UNKNOWN;
+    }
+
+    /**
+     * Constructor from a long value.
+     *
+     * @param value the value to use.
+     */
+    public Dpid(long value) {
+        this.value = value;
+    }
+
+    /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public Dpid(String value) {
+        this.value = HexString.toLong(value);
+    }
+
+    /**
+     * Get the value of the DPID.
+     *
+     * @return the value of the DPID.
+     */
+    public long value() {
+        return value;
+    }
+
+    /**
+     * Convert the DPID value to a ':' separated hexadecimal string.
+     *
+     * @return the DPID value as a ':' separated hexadecimal string.
+     */
+    @Override
+    public String toString() {
+        return HexString.toHexString(this.value);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (!(other instanceof Dpid)) {
+            return false;
+        }
+
+        Dpid otherDpid = (Dpid) other;
+
+        return value == otherDpid.value;
+    }
+
+    @Override
+    public int hashCode() {
+        return Long.hashCode(value);
+    }
+
+    /**
+     * Returns DPID created from the given device URI.
+     *
+     * @param uri device URI
+     * @return dpid
+     */
+    public static Dpid dpid(URI uri) {
+        checkArgument(uri.getScheme().equals(SCHEME), "Unsupported URI scheme");
+        return new Dpid(fromHex(uri.getSchemeSpecificPart()));
+    }
+
+    /**
+     * Produces device URI from the given DPID.
+     *
+     * @param dpid device dpid
+     * @return device URI
+     */
+    public static URI uri(Dpid dpid) {
+        return uri(dpid.value);
+    }
+
+    /**
+     * Produces device URI from the given DPID long.
+     *
+     * @param value device dpid as long
+     * @return device URI
+     */
+    public static URI uri(long value) {
+        try {
+            return new URI(SCHEME, toHex(value), null);
+        } catch (URISyntaxException e) {
+            return null;
+        }
+    }
+
+}