Github user klopfdreh commented on a diff in the pull request:
https://github.com/apache/wicket/pull/283#discussion_r239994141
--- Diff:
wicket-core/src/main/java/org/apache/wicket/pageStore/disk/NestedFolders.java
---
@@ -0,0 +1,123 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.wicket.pageStore.disk;
+
+import java.io.File;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.apache.wicket.util.file.Files;
+import org.apache.wicket.util.lang.Args;
+
+/**
+ * Helps creating nested folders.
+ *
+ * @author svenmeier
+ */
+public class NestedFolders
+{
+ private final File base;
+
+ /**
+ * Create folders in the given base folder.
+ *
+ * @param base base has to be a folder
+ */
+ public NestedFolders(File base) {
+ this.base = Args.notNull(base, "base");
+ }
+
+ public File getBase()
+ {
+ return base;
+ }
+
+ /**
+ * Get a nested folder for the given name.
+ *
+ * @param name name
+ * @param create
+ * @return
+ */
+ public File get(String name, final boolean create) {
+ name = name.replace('*', '_');
+ name = name.replace('/', '_');
--- End diff --
What about \ in windows?
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