From 846e51f6df6b29222d5d83372705cb694db22ad7 Mon Sep 17 00:00:00 2001
From: Mathieu Baudier <mbaudier@argeo.org>
Date: Sat, 21 Jan 2017 15:53:27 +0100
Subject: [PATCH] Fix issue with self relativize

---
 .../org/argeo/jcr/fs/JcrFileSystemTest.java    | 13 +++++++++++--
 .../src/org/argeo/jcr/fs/JcrPath.java          | 18 +++++++++++++++++-
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/org.argeo.jcr/ext/test/org/argeo/jcr/fs/JcrFileSystemTest.java b/org.argeo.jcr/ext/test/org/argeo/jcr/fs/JcrFileSystemTest.java
index 1cf7ef70e..2ad75a2aa 100644
--- a/org.argeo.jcr/ext/test/org/argeo/jcr/fs/JcrFileSystemTest.java
+++ b/org.argeo.jcr/ext/test/org/argeo/jcr/fs/JcrFileSystemTest.java
@@ -29,7 +29,18 @@ public class JcrFileSystemTest extends TestCase {
 		FileSystemProvider fsProvider = new JackrabbitMemoryFsProvider();
 
 		// Simple file
+		Path rootPath = fsProvider.getPath(new URI("jcr+memory:/"));
+		log.debug("Got root " + rootPath);
 		Path testPath = fsProvider.getPath(new URI("jcr+memory:/test.txt"));
+		log.debug("Test path");
+		assertEquals("test.txt", testPath.getFileName().toString());
+		assertEquals(rootPath, testPath.getParent());
+		assertEquals(testPath.getFileName(), rootPath.relativize(testPath));
+		// relativize self should be empty path
+		Path selfRelative = testPath.relativize(testPath);
+		assertEquals("", selfRelative.toString());
+
+		log.debug("Create file " + testPath);
 		Files.createFile(testPath);
 		BasicFileAttributes bfa = Files.readAttributes(testPath, BasicFileAttributes.class);
 		FileTime ft = bfa.creationTime();
@@ -46,8 +57,6 @@ public class JcrFileSystemTest extends TestCase {
 		assertTrue(Arrays.equals(arr, read));
 		assertEquals(txt, new String(read));
 		log.debug("Read " + testPath);
-		Path rootPath = fsProvider.getPath(new URI("jcr+memory:/"));
-		log.debug("Got root " + rootPath);
 		Path testDir = rootPath.resolve("testDir");
 		log.debug("Resolved " + testDir);
 		// Copy
diff --git a/org.argeo.jcr/src/org/argeo/jcr/fs/JcrPath.java b/org.argeo.jcr/src/org/argeo/jcr/fs/JcrPath.java
index 6a0c7adfe..1f7943484 100644
--- a/org.argeo.jcr/src/org/argeo/jcr/fs/JcrPath.java
+++ b/org.argeo.jcr/src/org/argeo/jcr/fs/JcrPath.java
@@ -41,6 +41,11 @@ public class JcrPath implements Path {
 			this.absolute = true;
 			this.hashCode = 0;
 			return;
+		} else if (path.equals("")) {// empty path
+			this.path = new String[] { "" };
+			this.absolute = false;
+			this.hashCode = "".hashCode();
+			return;
 		}
 		this.absolute = path.charAt(0) == delimChar ? true : false;
 		String trimmedPath = path.substring(absolute ? 1 : 0,
@@ -234,7 +239,7 @@ public class JcrPath implements Path {
 			String p2 = other.toString();
 			return new JcrPath(fs, p2.substring(p1.length(), p2.length()));
 		}
-		throw new UnsupportedOperationException();
+		throw new IllegalArgumentException(other + " cannot be realtivized against " + this);
 	}
 
 	@Override
@@ -296,6 +301,17 @@ public class JcrPath implements Path {
 		if (!(obj instanceof JcrPath))
 			return false;
 		JcrPath other = (JcrPath) obj;
+
+		if (path == null) {// root
+			if (other.path == null)// root
+				return true;
+			else
+				return false;
+		} else {
+			if (other.path == null)// root
+				return false;
+		}
+		// non root
 		if (path.length != other.path.length)
 			return false;
 		for (int i = 0; i < path.length; i++) {
-- 
2.30.2