| 1 | /** |
| 2 | * BSD-style license; for more info see http://xradar.sourceforge.net/license.html |
| 3 | */ |
| 4 | package org.sourceforge.xradar.util; |
| 5 | |
| 6 | import java.io.IOException; |
| 7 | import java.io.InputStream; |
| 8 | import java.net.MalformedURLException; |
| 9 | import java.net.URL; |
| 10 | import java.net.URLConnection; |
| 11 | |
| 12 | import org.sourceforge.xradar.XRadarException; |
| 13 | |
| 14 | /** |
| 15 | * @author Romain PELISSE <belaran@gmail.com> |
| 16 | * |
| 17 | */ |
| 18 | public final class URLUtils { |
| 19 | |
| 20 | /** |
| 21 | * <p>Handy method to create an {@link URLConnection} instance that |
| 22 | * wraps any exception in an {@link XRadarException}.</p> |
| 23 | * |
| 24 | * @param urlAsString |
| 25 | * @return the {@link URLConnection} instance or <code>null</code>. |
| 26 | * @throws XRadarException |
| 27 | */ |
| 28 | public static URLConnection openConnection(String urlAsString) throws XRadarException { |
| 29 | try { |
| 30 | return URLUtils.createURL(urlAsString).openConnection(); |
| 31 | } catch (IOException e) { |
| 32 | throw new XRadarException(e); |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | /** |
| 37 | * <p>Handy method to create an {@link URL} that wraps any exception |
| 38 | * in an {@link XRadarException}. |
| 39 | * |
| 40 | * @param url, a {@link String} that describs the URL. |
| 41 | * @return the {@link URL} instance or <code>null</code>. |
| 42 | * @throws XRadarException |
| 43 | */ |
| 44 | public static URL createURL(String url) throws XRadarException { |
| 45 | try |
| 46 | { |
| 47 | return new URL(url); |
| 48 | } |
| 49 | catch (MalformedURLException e) |
| 50 | { |
| 51 | throw new XRadarException(e); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * <p>An handy method that create an {@link InputStream} and that wraps |
| 57 | * any exception in an {@link XRadarException} instance.</p> |
| 58 | * |
| 59 | * @param url, a {@link String} that describs the URL. |
| 60 | * @return the {@link InputStream} instance of <code>null</code>. |
| 61 | * @throws XRadarException |
| 62 | */ |
| 63 | public static InputStream openStream(String url) throws XRadarException { |
| 64 | try { |
| 65 | return URLUtils.createURL(url).openStream(); |
| 66 | } catch (IOException e) { |
| 67 | throw new XRadarException(e); |
| 68 | } |
| 69 | } |
| 70 | } |