1 files changed, 96 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/profiler/chart/ChartRow.java b/src/main/java/com/google/devtools/build/lib/profiler/chart/ChartRow.java
new file mode 100644
index 0000000000..96597c96b2
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+++ b/src/main/java/com/google/devtools/build/lib/profiler/chart/ChartRow.java
@@ -0,0 +1,96 @@
+// 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;
+
+import com.google.common.base.Preconditions;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * A row of a Gantt Chart. A chart row is identified by its id and has an index that
+ * determines its location in the chart.
+ */
+public class ChartRow implements Comparable<ChartRow> {
+
+  /** The unique id of this row. */
+  private final String id;
+
+  /** The index, i.e., the row number of the row in the chart. */
+  private final int index;
+
+  /** The list of bars in this row. */
+  private final List<ChartBar> bars = new ArrayList<>();
+
+  /**
+   * Creates a chart row.
+   *
+   * @param id the unique id of this row
+   * @param index the index, i.e., the row number, of the row in the chart
+   */
+  public ChartRow(String id, int index) {
+    Preconditions.checkNotNull(id);
+    this.id = id;
+    this.index = index;
+  }
+
+  /**
+   * Adds a bar to the chart row.
+   *
+   * @param bar the {@link ChartBar} to add
+   */
+  public void addBar(ChartBar bar) {
+    bars.add(bar);
+  }
+
+  /**
+   * Returns the bars of the row as an unmodifieable list.
+   */
+  public List<ChartBar> getBars() {
+    return Collections.unmodifiableList(bars);
+  }
+
+  /**
+   * Accepts a {@link ChartVisitor}. Calls {@link ChartVisitor#visit(ChartRow)}
+   * and delegates the visitor to the bars of the chart row.
+   *
+   * @param visitor the visitor to accept
+   */
+  public void accept(ChartVisitor visitor) {
+    visitor.visit(this);
+    for (ChartBar bar : bars) {
+      bar.accept(visitor);
+    }
+  }
+
+  /**
+   * {@inheritDoc}
+   *
+   * <p>Compares to rows by their index.
+   */
+  @Override
+  public int compareTo(ChartRow other) {
+    return index - other.index;
+  }
+
+  public int getIndex() {
+    return index;
+  }
+
+  public String getId() {
+    return id;
+  }
+}