Cleanup Attributes and remove obsoleted Java7BasicAttributes class

After jgit moved to Java 7 there is no need in an extra
Java7BasicAttributes class. Also all fields of Attributes can be made
final now.

Change-Id: I0be6daf7758189b0eecc4e26294bd278ed8bf7a0
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>

org.eclipse.jgit/src/org/eclipse/jgit/util/FS.java

@@ -1067,28 +1067,28 @@ public abstract class FS {
 			return lastModifiedTime;
 		}
 
-		private boolean isDirectory;
+		private final boolean isDirectory;
 
-		private boolean isSymbolicLink;
+		private final boolean isSymbolicLink;
 
-		private boolean isRegularFile;
+		private final boolean isRegularFile;
 
-		private long creationTime;
+		private final long creationTime;
 
-		private long lastModifiedTime;
+		private final long lastModifiedTime;
 
-		private boolean isExecutable;
+		private final boolean isExecutable;
 
-		private File file;
+		private final File file;
 
-		private boolean exists;
+		private final boolean exists;
 
 		/**
 		 * file length
 		 */
 		protected long length = -1;
 
-		FS fs;
+		final FS fs;
 
 		Attributes(FS fs, File file, boolean exists, boolean isDirectory,
 				boolean isExecutable, boolean isSymbolicLink,
@@ -1107,14 +1107,14 @@ public abstract class FS {
 		}
 
 		/**
-		 * Constructor when there are issues with reading
+		 * Constructor when there are issues with reading. All attributes except
+		 * given will be set to the default values.
 		 *
 		 * @param fs
 		 * @param path
 		 */
 		public Attributes(File path, FS fs) {
-			this.file = path;
+			this(fs, path, false, false, false, false, false, 0L, 0L, 0L);
-			this.fs = fs;
 		}
 
 		/**

org.eclipse.jgit/src/org/eclipse/jgit/util/FileUtil.java

@@ -47,7 +47,6 @@ import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.LinkOption;
-import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.nio.file.attribute.BasicFileAttributeView;
 import java.nio.file.attribute.BasicFileAttributes;
@@ -66,17 +65,6 @@ import org.eclipse.jgit.util.FS.Attributes;
  */
 public class FileUtil {
 
-	static class Java7BasicAttributes extends Attributes {
-
-		Java7BasicAttributes(FS fs, File fPath, boolean exists,
-				boolean isDirectory, boolean isExecutable,
-				boolean isSymbolicLink, boolean isRegularFile,
-				long creationTime, long lastModifiedTime, long length) {
-			super(fs, fPath, exists, isDirectory, isExecutable, isSymbolicLink,
-					isRegularFile, creationTime, lastModifiedTime, length);
-		}
-	}
-
 	/**
 	 * @param path
 	 * @return target path of the symlink
@@ -230,7 +218,7 @@ public class FileUtil {
 					.getFileAttributeView(nioPath,
 							BasicFileAttributeView.class,
 							LinkOption.NOFOLLOW_LINKS).readAttributes();
-			Attributes attributes = new FileUtil.Java7BasicAttributes(fs, path,
+			Attributes attributes = new Attributes(fs, path,
 					true,
 					readAttributes.isDirectory(),
 					fs.supportsExecute() ? path.canExecute() : false,
@@ -242,9 +230,6 @@ public class FileUtil {
 							.encode(FileUtils.readSymLink(path)).length
 							: readAttributes.size());
 			return attributes;
-		} catch (NoSuchFileException e) {
-			return new FileUtil.Java7BasicAttributes(fs, path, false, false,
-					false, false, false, 0L, 0L, 0L);
 		} catch (IOException e) {
 			return new Attributes(path, fs);
 		}
@@ -264,7 +249,7 @@ public class FileUtil {
 					.getFileAttributeView(nioPath,
 							PosixFileAttributeView.class,
 							LinkOption.NOFOLLOW_LINKS).readAttributes();
-			Attributes attributes = new FileUtil.Java7BasicAttributes(
+			Attributes attributes = new Attributes(
 					fs,
 					path,
 					true, //
@@ -277,9 +262,6 @@ public class FileUtil {
 					readAttributes.lastModifiedTime().toMillis(),
 					readAttributes.size());
 			return attributes;
-		} catch (NoSuchFileException e) {
-			return new FileUtil.Java7BasicAttributes(fs, path, false, false,
-					false, false, false, 0L, 0L, 0L);
 		} catch (IOException e) {
 			return new Attributes(path, fs);
 		}