incubator-tinkerpop git commit: Ensured that TraversalExplaination works for anonymous traversals (or any traversal that has no strategies). Added TraversalExplanationTest that verifies correct behavior. Fixed TINKERPOP-1175

[ok...@apache.org]

Repository: incubator-tinkerpop
Updated Branches:
  refs/heads/tp31 c5447c29c -> 15909c669


Ensured that TraversalExplaination works for anonymous traversals (or any traversal that has no strategies). Added TraversalExplanationTest that verifies correct behavior. Fixed TINKERPOP-1175


Project: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/commit/15909c66
Tree: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/tree/15909c66
Diff: http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/diff/15909c66

Branch: refs/heads/tp31
Commit: 15909c669b40d08dde16c225ee818796252d6a79
Parents: c5447c2
Author: Marko A. Rodriguez <ok...@gmail.com>
Authored: Wed Feb 24 07:30:24 2016 -0700
Committer: Marko A. Rodriguez <ok...@gmail.com>
Committed: Wed Feb 24 07:30:24 2016 -0700

----------------------------------------------------------------------
 .../traversal/util/TraversalExplanation.java    |  4 +--
 .../util/TraversalExplanationTest.java          | 38 ++++++++++++++++++++
 2 files changed, 40 insertions(+), 2 deletions(-)
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http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/15909c66/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanation.java
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diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanation.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanation.java
index 97c7ab8..786b994 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanation.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanation.java
@@ -84,7 +84,7 @@ public class TraversalExplanation implements Serializable {
     public String toString() {
         final String originalTraversal = "Original Traversal";
         final String finalTraversal = "Final Traversal";
-        final int maxStrategyColumnLength = this.strategyTraversals.stream().map(Pair::getValue0).map(Object::toString).map(String::length).max(Comparator.<Integer>naturalOrder()).get();
+        final int maxStrategyColumnLength = this.strategyTraversals.stream().map(Pair::getValue0).map(Object::toString).map(String::length).max(Comparator.<Integer>naturalOrder()).orElse(15);
         final int maxTraversalColumnLength = Stream.concat(Stream.of(Pair.with(null, this.traversal)), this.strategyTraversals.stream()).map(Pair::getValue1).map(Object::toString).map(String::length).max(Comparator.<Integer>naturalOrder()).get();
 
         final StringBuilder builder = new StringBuilder("Traversal Explanation\n");
@@ -115,7 +115,7 @@ public class TraversalExplanation implements Serializable {
         for (int i = 0; i < maxStrategyColumnLength - finalTraversal.length() + 7; i++) {
             builder.append(" ");
         }
-        builder.append(this.strategyTraversals.get(this.strategyTraversals.size() - 1).getValue1());
+        builder.append(this.strategyTraversals.size() > 0 ? this.strategyTraversals.get(this.strategyTraversals.size() - 1).getValue1() : this.traversal);
         return builder.toString();
     }
 

http://git-wip-us.apache.org/repos/asf/incubator-tinkerpop/blob/15909c66/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanationTest.java
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diff --git a/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanationTest.java b/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanationTest.java
new file mode 100644
index 0000000..5b154a0
--- /dev/null
+++ b/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanationTest.java
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.apache.tinkerpop.gremlin.process.traversal.util;
+
+import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+/**
+ * @author Marko A. Rodriguez (http://markorodriguez.com)
+ */
+public class TraversalExplanationTest {
+
+    @Test
+    public void shouldSupportAnonymousTraversals() {
+        final String toString = __.out("knows").in("created").explain().toString();
+        assertTrue(toString.contains("Traversal Explanation"));
+        assertTrue(toString.contains("Original Traversal"));
+        assertTrue(toString.contains("Final Traversal"));
+    }
+}