src/main/java/org/apache/sling/testing/junit/rules/instance/util/DirectoryAllocator.java

/*
 * 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.sling.testing.junit.rules.instance.util;

import java.io.File;
import java.util.concurrent.atomic.AtomicInteger;

public class DirectoryAllocator {

    private static AtomicInteger counter;

    static {
        counter = new AtomicInteger(1);
    }

    public File allocateDirectory(File root, String basename) {
        while (true) {
            File folder = new File(root, basename + "-" + counter.getAndIncrement());

            if (folder.exists()) {
                continue;
            }

            folder.mkdirs();

            return folder;
        }
    }
}