Support EditorConfig for online browser/editor.

src/main/java/editorconfig/JGitResourcePath.java

@@ -0,0 +1,84 @@
+package editorconfig;
+
+import org.ec4j.core.Resource;
+import org.ec4j.core.ResourcePath;
+import org.ec4j.core.model.Ec4jPath;
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.lib.Repository;
+
+public class JGitResourcePath implements ResourcePath {
+    private final Repository repo;
+    private final String revStr;
+    private final Ec4jPath path;
+
+    public JGitResourcePath(Repository repo, String revStr, Ec4jPath path){
+        this.repo= repo;
+        this.revStr = revStr;
+        this.path = path;
+    }
+
+    public static JGitResourcePath RootDirectory(Git git, String revStr){
+        return new JGitResourcePath(git.getRepository(), revStr, Ec4jPath.Ec4jPaths.of("/"));
+    }
+
+    @Override
+    public ResourcePath getParent() {
+        Ec4jPath parent = path.getParentPath();
+        return parent == null ? null : new JGitResourcePath(repo, revStr, parent);
+    }
+
+    @Override
+    public Ec4jPath getPath() {
+        return path;
+    }
+
+    @Override
+    public boolean hasParent() {
+        return path.getParentPath() != null;
+    }
+
+    @Override
+    public Resource relativize(Resource resource) {
+        if (resource instanceof JGitResource) {
+            JGitResource jgitResource = (JGitResource) resource;
+            return new JGitResource(repo, revStr, path.relativize(jgitResource.path).toString());
+        } else {
+            throw new IllegalArgumentException(
+                this.getClass().getName() + ".relativize(Resource resource) can handle only instances of "
+                    + JGitResource.class.getName());
+        }
+    }
+
+    @Override
+    public Resource resolve(String name) {
+        if(path == null){
+            return new JGitResource(repo, revStr, name);
+        }
+        else {
+            return new JGitResource(repo, revStr, path.resolve(name));
+        }
+    }
+
+    @Override
+    public boolean equals(Object obj){
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        JGitResourcePath other = (JGitResourcePath) obj;
+        if (!repo.equals(other.repo) || !revStr.equals(other.revStr) || !path.equals(other.path)){
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString(){
+        return "JGitResoucePath(Repo:" + repo.getDirectory() + ", revStr:" + revStr + ", path:" + path.toString() + ")";
+    }
+}