STC work in progress
Change-Id: Ie5e444e3b560b605b066899289cdee7a5fe8338c
diff --git a/utils/stc/src/main/java/org/onlab/stc/Step.java b/utils/stc/src/main/java/org/onlab/stc/Step.java
new file mode 100644
index 0000000..834e0ec
--- /dev/null
+++ b/utils/stc/src/main/java/org/onlab/stc/Step.java
@@ -0,0 +1,103 @@
+/*
+ * 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.Vertex;
+
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Representation of a test step.
+ */
+public class Step implements Vertex {
+
+ protected final String name;
+ protected final String command;
+ protected final Group group;
+
+ /**
+ * Creates a new test step.
+ *
+ * @param name step name
+ * @param command step command to execute
+ * @param group optional group to which this step belongs
+ */
+ public Step(String name, String command, Group group) {
+ this.name = checkNotNull(name, "Name cannot be null");
+ this.group = group;
+
+ // Set the command; if one is not given default to the enclosing group
+ this.command = command != null ? command :
+ group != null && group.command != null ? group.command : null;
+ }
+
+ /**
+ * Returns the step name.
+ *
+ * @return step name
+ */
+ public String name() {
+ return name;
+ }
+
+ /**
+ * Returns the step command string.
+ *
+ * @return command string
+ */
+ public String command() {
+ return command;
+ }
+
+ /**
+ * Returns the enclosing group; null if none.
+ *
+ * @return enclosing group or null
+ */
+ public Group group() {
+ return group;
+ }
+
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(name);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj instanceof Step) {
+ final Step other = (Step) obj;
+ return Objects.equals(this.name, other.name);
+ }
+ return false;
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(this)
+ .add("name", name)
+ .add("command", command)
+ .add("group", group)
+ .toString();
+ }
+}