--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.debug.core/src/org/chromium/debug/core/model/DestructingGuard.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,46 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.debug.core.model;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Helper class that destructs unfinished objects. It is needed when Java GC is not enough.
+ * It requires to be explicitly discharged if all went OK and destruction should be cancelled.
+ * Using this class may be more convenient that try/finally in Java.
+ */
+public class DestructingGuard {
+  /**
+   * Confirms that constructing has finished OKAY and no destruction is needed from now.
+   */
+  public void discharge() {
+    discharged = true;
+  }
+
+  /**
+   * This method is supposed to be called from finally clause. It performs destructing
+   * unless {@link #discharge()} has been called.
+   */
+  public void doFinally() {
+    if (discharged) {
+      return;
+    }
+    for (int i = destructables.size() - 1; i >= 0; i--) {
+      destructables.get(i).destruct();
+    }
+    discharged = true;
+  }
+
+  /**
+   * Adds another value that should be destructed. Added values are destructed in reversed order.
+   */
+  public void addValue(Destructable destructable) {
+    this.destructables.add(destructable);
+  }
+
+  private List<Destructable> destructables = new ArrayList<Destructable>(1);
+  private boolean discharged = false;
+}