Wed, 27 Apr 2016 15:32:20 -0700
Added tag jdk8u102-b05 for changeset 1f512419ae33
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | package javax.activation; |
aoqi@0 | 27 | |
aoqi@0 | 28 | import java.net.URL; |
aoqi@0 | 29 | import java.net.URLConnection; |
aoqi@0 | 30 | import java.io.InputStream; |
aoqi@0 | 31 | import java.io.OutputStream; |
aoqi@0 | 32 | import java.io.IOException; |
aoqi@0 | 33 | |
aoqi@0 | 34 | /** |
aoqi@0 | 35 | * The URLDataSource class provides an object that wraps a <code>URL</code> |
aoqi@0 | 36 | * object in a DataSource interface. URLDataSource simplifies the handling |
aoqi@0 | 37 | * of data described by URLs within the JavaBeans Activation Framework |
aoqi@0 | 38 | * because this class can be used to create new DataHandlers. <i>NOTE: The |
aoqi@0 | 39 | * DataHandler object creates a URLDataSource internally, |
aoqi@0 | 40 | * when it is constructed with a URL.</i> |
aoqi@0 | 41 | * |
aoqi@0 | 42 | * @see javax.activation.DataSource |
aoqi@0 | 43 | * @see javax.activation.DataHandler |
aoqi@0 | 44 | * |
aoqi@0 | 45 | * @since 1.6 |
aoqi@0 | 46 | */ |
aoqi@0 | 47 | public class URLDataSource implements DataSource { |
aoqi@0 | 48 | private URL url = null; |
aoqi@0 | 49 | private URLConnection url_conn = null; |
aoqi@0 | 50 | |
aoqi@0 | 51 | /** |
aoqi@0 | 52 | * URLDataSource constructor. The URLDataSource class will |
aoqi@0 | 53 | * not open a connection to the URL until a method requiring it |
aoqi@0 | 54 | * to do so is called. |
aoqi@0 | 55 | * |
aoqi@0 | 56 | * @param url The URL to be encapsulated in this object. |
aoqi@0 | 57 | */ |
aoqi@0 | 58 | public URLDataSource(URL url) { |
aoqi@0 | 59 | this.url = url; |
aoqi@0 | 60 | } |
aoqi@0 | 61 | |
aoqi@0 | 62 | /** |
aoqi@0 | 63 | * Returns the value of the URL content-type header field. |
aoqi@0 | 64 | * It calls the URL's <code>URLConnection.getContentType</code> method |
aoqi@0 | 65 | * after retrieving a URLConnection object. |
aoqi@0 | 66 | * <i>Note: this method attempts to call the <code>openConnection</code> |
aoqi@0 | 67 | * method on the URL. If this method fails, or if a content type is not |
aoqi@0 | 68 | * returned from the URLConnection, getContentType returns |
aoqi@0 | 69 | * "application/octet-stream" as the content type.</i> |
aoqi@0 | 70 | * |
aoqi@0 | 71 | * @return the content type. |
aoqi@0 | 72 | */ |
aoqi@0 | 73 | public String getContentType() { |
aoqi@0 | 74 | String type = null; |
aoqi@0 | 75 | |
aoqi@0 | 76 | try { |
aoqi@0 | 77 | if (url_conn == null) |
aoqi@0 | 78 | url_conn = url.openConnection(); |
aoqi@0 | 79 | } catch (IOException e) { } |
aoqi@0 | 80 | |
aoqi@0 | 81 | if (url_conn != null) |
aoqi@0 | 82 | type = url_conn.getContentType(); |
aoqi@0 | 83 | |
aoqi@0 | 84 | if (type == null) |
aoqi@0 | 85 | type = "application/octet-stream"; |
aoqi@0 | 86 | |
aoqi@0 | 87 | return type; |
aoqi@0 | 88 | } |
aoqi@0 | 89 | |
aoqi@0 | 90 | /** |
aoqi@0 | 91 | * Calls the <code>getFile</code> method on the URL used to |
aoqi@0 | 92 | * instantiate the object. |
aoqi@0 | 93 | * |
aoqi@0 | 94 | * @return the result of calling the URL's getFile method. |
aoqi@0 | 95 | */ |
aoqi@0 | 96 | public String getName() { |
aoqi@0 | 97 | return url.getFile(); |
aoqi@0 | 98 | } |
aoqi@0 | 99 | |
aoqi@0 | 100 | /** |
aoqi@0 | 101 | * The getInputStream method from the URL. Calls the |
aoqi@0 | 102 | * <code>openStream</code> method on the URL. |
aoqi@0 | 103 | * |
aoqi@0 | 104 | * @return the InputStream. |
aoqi@0 | 105 | */ |
aoqi@0 | 106 | public InputStream getInputStream() throws IOException { |
aoqi@0 | 107 | return url.openStream(); |
aoqi@0 | 108 | } |
aoqi@0 | 109 | |
aoqi@0 | 110 | /** |
aoqi@0 | 111 | * The getOutputStream method from the URL. First an attempt is |
aoqi@0 | 112 | * made to get the URLConnection object for the URL. If that |
aoqi@0 | 113 | * succeeds, the getOutputStream method on the URLConnection |
aoqi@0 | 114 | * is returned. |
aoqi@0 | 115 | * |
aoqi@0 | 116 | * @return the OutputStream. |
aoqi@0 | 117 | */ |
aoqi@0 | 118 | public OutputStream getOutputStream() throws IOException { |
aoqi@0 | 119 | // get the url connection if it is available |
aoqi@0 | 120 | url_conn = url.openConnection(); |
aoqi@0 | 121 | |
aoqi@0 | 122 | if (url_conn != null) { |
aoqi@0 | 123 | url_conn.setDoOutput(true); |
aoqi@0 | 124 | return url_conn.getOutputStream(); |
aoqi@0 | 125 | } else |
aoqi@0 | 126 | return null; |
aoqi@0 | 127 | } |
aoqi@0 | 128 | |
aoqi@0 | 129 | /** |
aoqi@0 | 130 | * Return the URL used to create this DataSource. |
aoqi@0 | 131 | * |
aoqi@0 | 132 | * @return The URL. |
aoqi@0 | 133 | */ |
aoqi@0 | 134 | public URL getURL() { |
aoqi@0 | 135 | return url; |
aoqi@0 | 136 | } |
aoqi@0 | 137 | } |