Java InetAddress createAbsoluteURL(InetAddress address, int localStreamPort, URI relativeOrNot)

Description

create Absolute URL

License

CDDL license

Declaration

public static URL createAbsoluteURL(InetAddress address, int localStreamPort, URI relativeOrNot)
            throws IllegalArgumentException 

Method Source Code

//package com.java2s;
/**// w  ww.  j av  a 2s .  c o  m
 * Copyright (C) 2014 4th Line GmbH, Switzerland and others
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License Version 1 or later
 * ("CDDL") (collectively, the "License"). You may not use this file
 * except in compliance with the License. See LICENSE.txt for more
 * information.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

import java.net.*;

public class Main {
    public static URL createAbsoluteURL(URL base, String uri) throws IllegalArgumentException {
        return createAbsoluteURL(base, URI.create(uri));
    }

    public static URL createAbsoluteURL(URL base, URI relativeOrNot) throws IllegalArgumentException {

        if (base == null && !relativeOrNot.isAbsolute()) {
            throw new IllegalArgumentException("Base URL is null and given URI is not absolute");
        } else if (base == null && relativeOrNot.isAbsolute()) {
            try {
                return relativeOrNot.toURL();
            } catch (Exception ex) {
                throw new IllegalArgumentException("Base URL was null and given URI can't be converted to URL");
            }
        } else {
            try {
                assert base != null;
                URI baseURI = base.toURI();
                URI absoluteURI = createAbsoluteURI(baseURI, relativeOrNot);
                return absoluteURI.toURL();
            } catch (Exception ex) {
                throw new IllegalArgumentException("Base URL is not an URI, or can't create absolute URI (null?), "
                        + "or absolute URI can not be converted to URL", ex);
            }
        }
    }

    public static URL createAbsoluteURL(URI base, URI relativeOrNot) throws IllegalArgumentException {
        try {
            return createAbsoluteURI(base, relativeOrNot).toURL();
        } catch (Exception ex) {
            throw new IllegalArgumentException("Absolute URI can not be converted to URL", ex);
        }
    }

    public static URL createAbsoluteURL(InetAddress address, int localStreamPort, URI relativeOrNot)
            throws IllegalArgumentException {
        try {
            if (address instanceof Inet6Address) {
                return createAbsoluteURL(new URL("http://[" + address.getHostAddress() + "]:" + localStreamPort),
                        relativeOrNot);
            } else if (address instanceof Inet4Address) {
                return createAbsoluteURL(new URL("http://" + address.getHostAddress() + ":" + localStreamPort),
                        relativeOrNot);
            } else {
                throw new IllegalArgumentException("InetAddress is neither IPv4 nor IPv6: " + address);
            }
        } catch (Exception ex) {
            throw new IllegalArgumentException("Address, port, and URI can not be converted to URL", ex);
        }
    }

    public static URL toURL(URI uri) {
        if (uri == null)
            return null;
        try {
            return uri.toURL();
        } catch (MalformedURLException ex) {
            throw new RuntimeException(ex);
        }
    }

    public static URI toURI(URL url) {
        if (url == null)
            return null;
        try {
            return url.toURI();
        } catch (URISyntaxException ex) {
            throw new RuntimeException(ex);
        }
    }

    /**
     * Guarantees that the returned URI is absolute, no matter what the argument is.
     *
     * @param base An absolute base URI, can be null!
     * @param uri  A string that either represents a relative or an already absolute URI
     * @return An absolute URI
     * @throws IllegalArgumentException If the base URI is null and the given URI string is not absolute
     */
    public static URI createAbsoluteURI(URI base, String uri) throws IllegalArgumentException {
        return createAbsoluteURI(base, URI.create(uri));
    }

    public static URI createAbsoluteURI(URI base, URI relativeOrNot) throws IllegalArgumentException {
        if (base == null && !relativeOrNot.isAbsolute()) {
            throw new IllegalArgumentException("Base URI is null and given URI is not absolute");
        } else if (base == null && relativeOrNot.isAbsolute()) {
            return relativeOrNot;
        } else {
            assert base != null;
            // If the given base URI has no path we give it a root path
            if (base.getPath().length() == 0) {
                try {
                    base = new URI(base.getScheme(), base.getAuthority(), "/", base.getQuery(), base.getFragment());
                } catch (Exception ex) {
                    throw new IllegalArgumentException(ex);
                }
            }
            return base.resolve(relativeOrNot);
        }
    }
}

Related

1. CompareIP(InetAddress ip1, InetAddress ip2)
2. contains(InetAddress network, InetAddress netmask, InetAddress ip)
3. convertInetAddressToLong(InetAddress addr)
4. convertInetAddressToLong(InetAddress address)
5. convertLongToInetAddress(long address)
6. createDatagramSocket(InetAddress addr, int port)
7. createInetSocketAddress(final InetAddress address)
8. createResolved(InetAddress address, int port)
9. createSocket(InetAddress address, int port, boolean fixedPort)