1 files changed, 77 insertions, 0 deletions
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Dependency.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Dependency.java
new file mode 100644
index 00000000..9025d2e5
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Dependency.java
@@ -0,0 +1,77 @@
+/*
+ * 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.onlab.stc;
+
+import com.google.common.base.MoreObjects;
+import org.onlab.graph.AbstractEdge;
+
+import java.util.Objects;
+
+/**
+ * Representation of a dependency from one step on completion of another.
+ */
+public class Dependency extends AbstractEdge<Step> {
+
+    private boolean isSoft;
+
+    /**
+     * Creates a new edge between the specified source and destination vertexes.
+     *
+     * @param src    source vertex
+     * @param dst    destination vertex
+     * @param isSoft indicates whether this is a hard or soft dependency
+     */
+    public Dependency(Step src, Step dst, boolean isSoft) {
+        super(src, dst);
+        this.isSoft = isSoft;
+    }
+
+    /**
+     * Indicates whether this is a soft or hard dependency, i.e. one that
+     * requires successful completion of the dependency or just any completion.
+     *
+     * @return true if dependency is a soft one
+     */
+    public boolean isSoft() {
+        return isSoft;
+    }
+
+    @Override
+    public int hashCode() {
+        return 31 * super.hashCode() + Objects.hash(isSoft);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof Dependency) {
+            final Dependency other = (Dependency) obj;
+            return super.equals(other) && Objects.equals(this.isSoft, other.isSoft);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("name", src().name())
+                .add("requires", dst().name())
+                .add("isSoft", isSoft)
+                .toString();
+    }
+}