1 files changed, 186 insertions, 0 deletions
diff --git a/subsonic-main/src/main/java/net/sourceforge/subsonic/util/FileUtil.java b/subsonic-main/src/main/java/net/sourceforge/subsonic/util/FileUtil.java
new file mode 100644
index 00000000..e91758ef
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+++ b/subsonic-main/src/main/java/net/sourceforge/subsonic/util/FileUtil.java
@@ -0,0 +1,186 @@
+/*
+ This file is part of Subsonic.
+
+ Subsonic is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Subsonic is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Subsonic.  If not, see <http://www.gnu.org/licenses/>.
+
+ Copyright 2009 (C) Sindre Mehus
+ */
+package net.sourceforge.subsonic.util;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.util.Arrays;
+
+import net.sourceforge.subsonic.Logger;
+
+/**
+ * Miscellaneous file utility methods.
+ *
+ * @author Sindre Mehus
+ */
+public final class FileUtil {
+
+    private static final Logger LOG = Logger.getLogger(FileUtil.class);
+
+    /**
+     * Disallow external instantiation.
+     */
+    private FileUtil() {
+    }
+
+    public static boolean isFile(final File file) {
+        return timed(new FileTask<Boolean>("isFile", file) {
+            @Override
+            public Boolean execute() {
+                return file.isFile();
+            }
+        });
+    }
+
+    public static boolean isDirectory(final File file) {
+        return timed(new FileTask<Boolean>("isDirectory", file) {
+            @Override
+            public Boolean execute() {
+                return file.isDirectory();
+            }
+        });
+    }
+
+    public static boolean exists(final File file) {
+        return timed(new FileTask<Boolean>("exists", file) {
+            @Override
+            public Boolean execute() {
+                return file.exists();
+            }
+        });
+    }
+
+    public static long lastModified(final File file) {
+        return timed(new FileTask<Long>("lastModified", file) {
+            @Override
+            public Long execute() {
+                return file.lastModified();
+            }
+        });
+    }
+
+    public static long length(final File file) {
+        return timed(new FileTask<Long>("length", file) {
+            @Override
+            public Long execute() {
+                return file.length();
+            }
+        });
+    }
+
+    /**
+     * Similar to {@link File#listFiles()}, but never returns null.
+     * Instead a warning is logged, and an empty array is returned.
+     */
+    public static File[] listFiles(final File dir) {
+        File[] files = timed(new FileTask<File[]>("listFiles", dir) {
+            @Override
+            public File[] execute() {
+                return dir.listFiles();
+            }
+        });
+
+        if (files == null) {
+            LOG.warn("Failed to list children for " + dir.getPath());
+            return new File[0];
+        }
+        return files;
+    }
+
+    /**
+     * Similar to {@link File#listFiles(FilenameFilter)}, but never returns null.
+     * Instead a warning is logged, and an empty array is returned.
+     */
+    public static File[] listFiles(final File dir, final FilenameFilter filter, boolean sort) {
+        File[] files = timed(new FileTask<File[]>("listFiles2", dir) {
+            @Override
+            public File[] execute() {
+                return dir.listFiles(filter);
+            }
+        });
+        if (files == null) {
+            LOG.warn("Failed to list children for " + dir.getPath());
+            return new File[0];
+        }
+        if (sort) {
+            Arrays.sort(files);
+        }
+        return files;
+    }
+
+    /**
+     * Returns a short path for the given file.  The path consists of the name
+     * of the parent directory and the given file.
+     */
+    public static String getShortPath(File file) {
+        if (file == null) {
+            return null;
+        }
+        File parent = file.getParentFile();
+        if (parent == null) {
+            return file.getName();
+        }
+        return parent.getName() + File.separator + file.getName();
+    }
+
+    /**
+     * Closes the "closable", ignoring any excepetions.
+     *
+     * @param closeable The Closable to close, may be {@code null}.
+     */
+    public static void closeQuietly(Closeable closeable) {
+        if (closeable != null) {
+            try {
+                closeable.close();
+            } catch (IOException e) {
+                // Ignored
+            }
+        }
+    }
+
+    private static <T> T timed(FileTask<T> task) {
+//        long t0 = System.nanoTime();
+//        try {
+            return task.execute();
+//        } finally {
+//            long t1 = System.nanoTime();
+//            LOG.debug((t1 - t0) / 1000L + " microsec, " + task);
+//        }
+    }
+
+    private abstract static class FileTask<T> {
+
+        private final String name;
+        private final File file;
+
+        public FileTask(String name, File file) {
+            this.name = name;
+            this.file = file;
+        }
+
+        public abstract T execute();
+
+        @Override
+        public String toString() {
+            return name + ", " + file;
+        }
+    }
+}
+\ No newline at end of file