Adds the MoreCloseables utility file.

- This has methods for closing objects iff they are not-null, in
  exactly the same way as Closeables, but for objects that don't
  implement the Closeable interface.
- Specifically at the moment this involves Cursor and
  AssetFileDescriptor objects.

Change-Id: I92e8719e6deab7652f940d129594cdee3c8f3061

1 files changed, 46 insertions, 0 deletions

diff --git a/common/java/com/android/common/io/MoreCloseables.java b/common/java/com/android/common/io/MoreCloseables.java
new file mode 100644
index 0000000..2044499
--- /dev/null
+++ b/common/java/com/android/common/io/MoreCloseables.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * 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.android.common.io;
+
+import android.content.res.AssetFileDescriptor;
+import android.database.Cursor;
+
+import java.io.IOException;
+
+public class MoreCloseables {
+    /**
+     * Closes the supplied cursor iff it is not null.
+     */
+    public static void closeQuietly(Cursor cursor) {
+        if (cursor != null) {
+            cursor.close();
+        }
+    }
+
+    /**
+     * Closes the given file descriptor iff it is not null, ignoring exceptions.
+     */
+    public static void closeQuietly(AssetFileDescriptor assetFileDescriptor) {
+        if (assetFileDescriptor != null) {
+            try {
+                assetFileDescriptor.close();
+            } catch (IOException e) {
+                // Ignore exceptions when closing.
+            }
+        }
+    }
+}