Length of symbolic link is the number of bytes, not characters

Change-Id: I6b615f0d5da4339f1f23a29bcaeb80f0346f5764

org.eclipse.jgit.java7.test/src/org/eclipse/jgit/util/FSJava7Test.java

@@ -85,16 +85,16 @@ public class FSJava7Test {
 	@Test
 	public void testSymlinkAttributes() throws IOException, InterruptedException {
 		FS fs = FS.DETECTED;
-		File link = new File(trash, "x");
-		File target = new File(trash, "y");
-		fs.createSymLink(link, "y");
+		File link = new File(trash, "ä");
+		File target = new File(trash, "å");
+		fs.createSymLink(link, "å");
 		assertTrue(fs.exists(link));
 		String targetName = fs.readSymLink(link);
-		assertEquals("y", targetName);
+		assertEquals("å", targetName);
 		assertTrue(fs.lastModified(link) > 0);
 		assertTrue(fs.exists(link));
 		assertFalse(fs.canExecute(link));
-		assertEquals(1, fs.length(link));
+		assertEquals(2, fs.length(link));
 		assertFalse(fs.exists(target));
 		assertFalse(fs.isFile(target));
 		assertFalse(fs.isDirectory(target));

org.eclipse.jgit.java7/src/org/eclipse/jgit/util/FileUtil.java

@@ -52,7 +52,7 @@ import java.nio.file.attribute.FileTime;
 import java.text.Normalizer;
 import java.text.Normalizer.Form;
 
-import org.eclipse.jgit.util.SystemReader;
+import org.eclipse.jgit.lib.Constants;
 
 class FileUtil {
 
@@ -113,7 +113,8 @@ class FileUtil {
 	public static long getLength(File path) throws IOException {
 		Path nioPath = path.toPath();
 		if (Files.isSymbolicLink(nioPath))
-			return Files.readSymbolicLink(nioPath).toString().length();
+			return Files.readSymbolicLink(nioPath).toString()
+					.getBytes(Constants.CHARSET).length;
 		return Files.size(nioPath);
 	}