Java URL Normalize normalize(URL url)

Description

normalize

License

Apache License

Declaration

public static URL normalize(URL url) 

Method Source Code

//package com.java2s;
/*//from w w w  .j a v a 2  s.c o  m
 * 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 java.io.File;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

public class Main {
    public static URL normalize(URL url) {
        // Make sure the trailing / is added to the file directory URL so that
        // URLClassLoader can load classes from that
        try {
            File file = toFile(url);
            if (file != null) {
                return file.toURI().toURL();
            } else {
                return toURI(url).toURL();
            }
        } catch (MalformedURLException e) {
            throw new IllegalArgumentException(e);
        }
    }

    /**
     * Returns the File object representing  the given URL.
     *
     * @param url
     * @return
     */
    public static File toFile(URL url) {
        if (url == null || !url.getProtocol().equals("file")) {
            return null;
        } else {
            String filename = url.getFile().replace('/', File.separatorChar);
            int pos = 0;
            while ((pos = filename.indexOf('%', pos)) >= 0) {
                if (pos + 2 < filename.length()) {
                    String hexStr = filename.substring(pos + 1, pos + 3);
                    char ch = (char) Integer.parseInt(hexStr, 16);
                    filename = filename.substring(0, pos) + ch + filename.substring(pos + 3);
                }
            }
            return new File(filename);
        }
    }

    public static URI toURI(URL url) {
        if (url == null) {
            return null;
        }
        return createURI(url.toString());
    }

    /**
     * Escape the space in URL string
     * @param uri
     * @return
     */
    public static URI createURI(String uri) {
        if (uri == null) {
            return null;
        }
        if (uri.indexOf('%') != -1) {
            // Avoid double-escaping
            return URI.create(uri);
        }
        int index = uri.indexOf(':');
        String scheme = null;
        String ssp = uri;
        if (index != -1) {
            scheme = uri.substring(0, index);
            ssp = uri.substring(index + 1);
        }
        try {
            return new URI(scheme, ssp, null);
        } catch (URISyntaxException e) {
            throw new IllegalArgumentException(e);
        }
    }
}

Related

1. normalize(String url)
2. normalize(String url)
3. normalize(String url)
4. normalize(String url_str)
5. normalize(URL u)
6. normalize(URL url)
7. normalizeBaseUrl(String networkUrl)
8. normalizeCapabilitiesUrl(String url)
9. normalizePrefix(String url)