1 files changed, 65 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/profiler/chart/ChartVisitor.java b/src/main/java/com/google/devtools/build/lib/profiler/chart/ChartVisitor.java
new file mode 100644
index 0000000000..b06b3ab037
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/profiler/chart/ChartVisitor.java
@@ -0,0 +1,65 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// 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 com.google.devtools.build.lib.profiler.chart;
+
+/**
+ * Visitor for {@link Chart} objects.
+ */
+public interface ChartVisitor {
+
+  /**
+   * Visits a {@link Chart} object before its children, i.e., rows and bars, are
+   * visited.
+   *
+   * @param chart the {@link Chart} to visit
+   */
+  void visit(Chart chart);
+
+  /**
+   * Visits a {@link Chart} object after its children, i.e., rows and bars, are
+   * visited.
+   *
+   * @param chart the {@link Chart} to visit
+   */
+  void endVisit(Chart chart);
+
+  /**
+   * Visits a {@link ChartRow} object.
+   *
+   * @param chartRow the {@link ChartRow} to visit
+   */
+  void visit(ChartRow chartRow);
+
+  /**
+   * Visits a {@link ChartBar} object.
+   *
+   * @param chartBar the {@link ChartBar} to visit
+   */
+  void visit(ChartBar chartBar);
+
+  /**
+   * Visits a {@link ChartColumn} object.
+   *
+   * @param chartColumn the {@link ChartColumn} to visit
+   */
+  void visit(ChartColumn chartColumn);
+
+  /**
+   * Visits a {@link ChartLine} object.
+   *
+   * @param chartLine the {@link ChartLine} to visit
+   */
+  void visit(ChartLine chartLine);
+}