DD-1492 dd-manage-deposits improvemnets fixes for DD-1419 - Part 2 di…

…rectory search depth limit

src/main/java/nl/knaw/dans/managedeposit/core/service/DepthFileFilter.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2023 DANS - Data Archiving and Networked Services ([email protected])
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package nl.knaw.dans.managedeposit.core.service;
+
+import org.apache.commons.io.filefilter.AbstractFileFilter;
+
+import java.io.File;
+import java.nio.file.Path;
+
+public class DepthFileFilter extends AbstractFileFilter {
+    private final Path baseFolder;
+    private final int depthLimit;
+
+    public DepthFileFilter(Path baseFolder, int depthLimit) {
+        this.baseFolder = baseFolder;
+        this.depthLimit = depthLimit;
+
+    }
+
+    public boolean accept(File file) {
+        Path parent = file.toPath();
+        for (int depth = 0; depth < this.depthLimit; depth++)
+            parent = parent.getParent();
+        if (parent.endsWith(this.baseFolder))
+            return true;
+
+        return false;
+    }
+}