1 files changed, 45 insertions, 0 deletions
diff --git a/framework/src/onos/utils/misc/src/main/java/org/onlab/graph/Path.java b/framework/src/onos/utils/misc/src/main/java/org/onlab/graph/Path.java
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index 00000000..ed9aa2c9
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+++ b/framework/src/onos/utils/misc/src/main/java/org/onlab/graph/Path.java
@@ -0,0 +1,45 @@
+/*
+ * 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.onlab.graph;
+
+import java.util.List;
+
+/**
+ * Representation of a path in a graph as a sequence of edges. Paths are
+ * assumed to be continuous, where adjacent edges must share a vertex.
+ *
+ * @param <V> vertex type
+ * @param <E> edge type
+ */
+public interface Path<V extends Vertex, E extends Edge<V>> extends Edge<V> {
+
+    /**
+     * Returns the list of edges comprising the path. Adjacent edges will
+     * share the same vertex, meaning that a source of one edge, will be the
+     * same as the destination of the prior edge.
+     *
+     * @return list of path edges
+     */
+    List<E> edges();
+
+    /**
+     * Returns the total cost of the path as a unit-less number.
+     *
+     * @return path cost as a unit-less number
+     */
+    double cost();
+
+}