1 files changed, 25 insertions, 0 deletions
diff --git a/dozentenmodulserver/src/main/java/util/FileSystem.java b/dozentenmodulserver/src/main/java/util/FileSystem.java
new file mode 100644
index 00000000..5f5a1e08
--- /dev/null
+++ b/dozentenmodulserver/src/main/java/util/FileSystem.java
@@ -0,0 +1,25 @@
+package util;
+
+import java.io.File;
+
+import org.apache.log4j.Logger;
+
+public class FileSystem {
+
+	private static final Logger LOGGER = Logger.getLogger(FileSystem.class);
+
+	public static String getRelativePath(File absolutePath, File parentDir) {
+		String file;
+		String dir;
+		try {
+			file = absolutePath.getCanonicalPath();
+			dir = parentDir.getCanonicalPath() + File.separator;
+		} catch (Exception e) {
+			LOGGER.error("Could not get relative path for " + absolutePath.toString(), e);
+			return null;
+		}
+		if (!file.startsWith(dir))
+			return null;
+		return file.substring(dir.length());
+	}
+}