1 files changed, 64 insertions, 0 deletions
diff --git a/nouveau/src/main/java/org/apache/couchdb/nouveau/core/IOUtils.java b/nouveau/src/main/java/org/apache/couchdb/nouveau/core/IOUtils.java
new file mode 100644
index 000000000..ab2bb7e35
--- /dev/null
+++ b/nouveau/src/main/java/org/apache/couchdb/nouveau/core/IOUtils.java
@@ -0,0 +1,64 @@
+//
+// 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 org.apache.couchdb.nouveau.core;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+
+public class IOUtils {
+
+    // From https://www.baeldung.com/java-delete-directory
+    public static void rm(final Path path) throws IOException {
+        File[] allContents = path.toFile().listFiles();
+        if (allContents != null) {
+            for (final File file : allContents) {
+                rm(file.toPath());
+            }
+        }
+        if (!path.toFile().delete()) {
+            throw new IOException("failed to delete " + path);
+        }
+    }
+
+    @FunctionalInterface
+    public interface IORunnable {
+        public abstract void run() throws IOException;
+    }
+
+    public static void runAll(final IORunnable... runnables) throws IOException {
+        Throwable thrown = null;
+        for (final IORunnable r : runnables) {
+            try {
+                r.run();
+            } catch (final Throwable e) {
+                if (thrown == null) {
+                    thrown = e;
+                }
+            }
+        }
+        if (thrown != null) {
+            if (thrown instanceof IOException) {
+                throw (IOException) thrown;
+            }
+            if (thrown instanceof RuntimeException) {
+                throw (RuntimeException) thrown;
+            }
+            if (thrown instanceof Error) {
+                throw (Error) thrown;
+            }
+        }
+    }
+
+}