Add FileUtils.

Not tested or used yet :)

Change-Id: If34cc6520c3d05ed33c6d82eac2e2fbcba99a688
Reviewed-on: http://gerrit.dmdirc.com/4042
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

src/com/dmdirc/util/io/FileUtils.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2006-2014 DMDirc Developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.util.io;
+
+import java.io.IOException;
+import java.net.URL;
+import java.nio.file.CopyOption;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+
+/**
+ * Utility class to deal with files.
+ */
+public final class FileUtils {
+
+    private FileUtils() {
+        // Shouldn't be instansiated.
+    }
+
+    /**
+     * Recursively copies the resources specified by the given URL to the destination folder.
+     * Existing files will be replaced.
+     *
+     * @param source The resource to be copied (file or folder).
+     * @param destination The destination folder to copy the resource to.
+     * @throws IOException If the resource couldn't be copied.
+     */
+    public static void copyResources(final URL source, final Path destination) throws IOException {
+        final Path sourcePath = Paths.get(source.toString());
+
+        copyRecursively(sourcePath, destination, StandardCopyOption.REPLACE_EXISTING);
+    }
+
+    /**
+     * Recursively copies one path to another. Once complete, a deep copy of the source file or
+     * folder will be present in the destination directory.
+     *
+     * @param source The path that should be copied.
+     * @param destination The directory to place copied files in.
+     * @param options Options to use when copying.
+     * @throws IOException If any files couldn't be copied.
+     */
+    public static void copyRecursively(final Path source, final Path destination,
+            final CopyOption... options) throws IOException {
+        final Path destinationPath = destination.resolve(source.getFileName());
+
+        if (Files.isDirectory(source)) {
+            Files.createDirectories(destinationPath);
+            try (DirectoryStream<Path> directoryStream = Files.newDirectoryStream(source)) {
+                for (Path path : directoryStream) {
+                    copyRecursively(path, destinationPath, options);
+                }
+            }
+        } else {
+            Files.copy(source, destinationPath, options);
+        }
+    }
+
+}