Abstracted snapshot work into interface.

services/git-bridge/src/uk/ac/ic/wlgitbridge/application/WLGitBridgeApplication.java

@@ -22,7 +22,7 @@ public class WLGitBridgeApplication {
 
     /**
      * Constructs an instance of the WriteLatex-Git Bridge application.
-     * @param args args from main, which should be in the format "port root_git_directory_path"
+     * @param args args from main, which should be in the format [port, root_git_directory_path]
      */
     public WLGitBridgeApplication(String[] args) {
         try {

services/git-bridge/src/uk/ac/ic/wlgitbridge/git/handler/WLRepositoryResolver.java

@@ -12,6 +12,8 @@ import org.eclipse.jgit.transport.resolver.RepositoryResolver;
 import org.eclipse.jgit.transport.resolver.ServiceNotAuthorizedException;
 import org.eclipse.jgit.transport.resolver.ServiceNotEnabledException;
 import uk.ac.ic.wlgitbridge.git.exception.InvalidRootDirectoryPathException;
+import uk.ac.ic.wlgitbridge.writelatex.RepositorySource;
+import uk.ac.ic.wlgitbridge.writelatex.SnapshotRepositorySource;
 
 import javax.servlet.http.HttpServletRequest;
 import java.io.File;
@@ -23,25 +25,16 @@ import java.io.IOException;
 public class WLRepositoryResolver implements RepositoryResolver<HttpServletRequest> {
 
     private File rootGitDirectory;
+    private RepositorySource repositorySource;
 
     public WLRepositoryResolver(String rootGitDirectoryPath) throws InvalidRootDirectoryPathException {
         initRootGitDirectory(rootGitDirectoryPath);
+        repositorySource = new SnapshotRepositorySource();
     }
 
     @Override
     public Repository open(HttpServletRequest httpServletRequest, String name) throws RepositoryNotFoundException, ServiceNotAuthorizedException, ServiceNotEnabledException, ServiceMayNotContinueException {
-        File repositoryRoot = new File(rootGitDirectory.getAbsolutePath(), name);
-
-        Repository repository = null;
-        try {
-            repository = new FileRepositoryBuilder().setWorkTree(repositoryRoot).build();
-        } catch (IOException e) {
-            throw new RepositoryNotFoundException(name);
-        }
-        if (!repository.getObjectDatabase().exists()) {
-            throw new RepositoryNotFoundException(name);
-        }
-        return repository;
+        return repositorySource.getRepositoryWithNameAtRootDirectory(name, rootGitDirectory);
     }
 
     private void initRootGitDirectory(String rootGitDirectoryPath) throws InvalidRootDirectoryPathException {

services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/RepositorySource.java

@@ -0,0 +1,15 @@
+package uk.ac.ic.wlgitbridge.writelatex;
+
+import org.eclipse.jgit.errors.RepositoryNotFoundException;
+import org.eclipse.jgit.lib.Repository;
+
+import java.io.File;
+
+/**
+ * Created by Winston on 03/11/14.
+ */
+public interface RepositorySource {
+
+    public Repository getRepositoryWithNameAtRootDirectory(String name, File rootDirectory) throws RepositoryNotFoundException;
+
+}

services/git-bridge/src/uk/ac/ic/wlgitbridge/writelatex/SnapshotRepositorySource.java

@@ -0,0 +1,31 @@
+package uk.ac.ic.wlgitbridge.writelatex;
+
+import org.eclipse.jgit.errors.RepositoryNotFoundException;
+import org.eclipse.jgit.lib.Repository;
+import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * Created by Winston on 03/11/14.
+ */
+public class SnapshotRepositorySource implements RepositorySource {
+
+    @Override
+    public Repository getRepositoryWithNameAtRootDirectory(String name, File rootDirectory) throws RepositoryNotFoundException {
+        File repositoryRoot = new File(rootDirectory.getAbsolutePath(), name);
+
+        Repository repository = null;
+        try {
+            repository = new FileRepositoryBuilder().setWorkTree(repositoryRoot).build();
+        } catch (IOException e) {
+            throw new RepositoryNotFoundException(name);
+        }
+        if (!repository.getObjectDatabase().exists()) {
+            throw new RepositoryNotFoundException(name);
+        }
+        return repository;
+    }
+
+}