Merge pull request #60 from lacerta-doc/model/public_path

PublicPathの追加

model/src/main/java/one/nem/lacerta/model/PublicPath.java

@@ -0,0 +1,68 @@
+package one.nem.lacerta.model;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class PublicPath {
+    /*
+     * ユーザーが扱うパス(内部パスの代替)
+     * (時間がないのでInjectされることは考慮しない)
+     *
+     * TODO-rca:
+     *  - こわれたパスを検知する
+     *  - バリデーション
+     */
+
+    List<String> path = new ArrayList<String>();
+
+    public PublicPath() {
+    }
+
+    public PublicPath(List<String> path) {
+        this.path = path;
+    }
+
+    private void add(String path) {
+        this.path.add(path);
+    }
+
+    private void resolveInternal(String path) {
+        if (path.equals("..")) {
+            this.path.remove(this.path.size() - 1);
+        } else {
+            add(path);
+        }
+    }
+
+    public PublicPath resolve(String path) {
+        resolveInternal(path);
+        return this;
+    }
+
+    public PublicPath resolve(List<String> path) {
+        for (String p : path) {
+            resolveInternal(p);
+        }
+        return this;
+    }
+
+    public PublicPath resolve(PublicPath path) {
+        for (String p : path.getPath()) {
+            resolveInternal(p);
+        }
+        return this;
+    }
+
+    public PublicPath parent() {
+        this.path.remove(this.path.size() - 1);
+        return this;
+    }
+
+    public List<String> getPath() {
+        return path;
+    }
+
+    public String getStringPath() {
+        return String.join("/", path);
+    }
+}