Initial commit 🎉

fbshipit-source-id: b6fc29740c6875d2e78953b8a7123890a67930f2
Co-authored-by: Sebastian McKenzie <sebmck@fb.com>
Co-authored-by: John Knox <jknox@fb.com>
Co-authored-by: Emil Sjölander <emilsj@fb.com>
Co-authored-by: Pritesh Nandgaonkar <prit91@fb.com>

android/plugins/common/RingBuffer.java

@@ -0,0 +1,31 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+package com.facebook.sonar.plugins.common;
+
+import java.util.LinkedList;
+import java.util.List;
+
+final class RingBuffer<T> {
+  final int mBufferSize;
+  final List<T> mBuffer = new LinkedList<>();
+
+  RingBuffer(int bufferSize) {
+    mBufferSize = bufferSize;
+  }
+
+  void enqueue(T item) {
+    if (mBuffer.size() >= mBufferSize) {
+      mBuffer.remove(0);
+    }
+    mBuffer.add(item);
+  }
+
+  List<T> asList() {
+    return mBuffer;
+  }
+}