archetype-common/src/main/java/org/apache/maven/archetype/common/util/PathUtils.java

package org.apache.maven.archetype.common.util;

/*
 * 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.
 */

import org.codehaus.plexus.util.StringUtils;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

/** @author rafale */
public class PathUtils
{
    /**
     * This method converts all \ or / chars to File.separatorChar.
     *
     * @param path
     * @return converted path
     */
    public static String convertPathForOS( String path )
    {
        path = StringUtils.replace( path, "/", File.separator );
        return StringUtils.replace( path, "\\", File.separator );
    }

    public static String getDirectory( String file, int level )
    {
        file = convertPathForOS( file );

        String[] fileAsArray = StringUtils.split( file, File.separator );
        List<String> directoryAsArray = new ArrayList<>();

        for ( int i = 0; ( i < level ) && ( i < ( fileAsArray.length - 1 ) ); i++ )
        {
            directoryAsArray.add( fileAsArray[i] );
        }

        return StringUtils.join( directoryAsArray.iterator(), File.separator );
    }
}