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Database migration tool for Cassandra

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/**
 * Copyright 2010-2015 Axel Fontaine
 * 
 * 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 com.builtamont.cassandra.migration.internal.util;

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLDecoder;

/**
 * Collection of utility methods for working with URLs.
 */
public class UrlUtils {
    /**
     * Prevent instantiation.
     */
    private UrlUtils() {
        // Do nothing
    }

    /**
     * Retrieves the file path of this URL, with any trailing slashes removed.
     *
     * @param url The URL to get the file path for.
     * @return The file path.
     */
    public static String toFilePath(URL url) {
        try {
            String filePath = new File(URLDecoder.decode(url.getPath().replace("+", "%2b"), "UTF-8")).getAbsolutePath();
            if (filePath.endsWith("/")) {
                return filePath.substring(0, filePath.length() - 1);
            }
            return filePath;
        } catch (UnsupportedEncodingException e) {
            throw new IllegalStateException("Can never happen", e);
        }
    }
}