Mercurial > jdk8-mips64-public > jaxws / file comparison
comparison: src/share/jaf_classes/javax/activation/URLDataSource.java
src/share/jaf_classes/javax/activation/URLDataSource.java
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| 1 /* | |
| 2 * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. Oracle designates this | |
| 8 * particular file as subject to the "Classpath" exception as provided | |
| 9 * by Oracle in the LICENSE file that accompanied this code. | |
| 10 * | |
| 11 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 * accompanied this code). | |
| 16 * | |
| 17 * You should have received a copy of the GNU General Public License version | |
| 18 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 * | |
| 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 * or visit www.oracle.com if you need additional information or have any | |
| 23 * questions. | |
| 24 */ | |
| 25 | |
| 26 package javax.activation; | |
| 27 | |
| 28 import java.net.URL; | |
| 29 import java.net.URLConnection; | |
| 30 import java.io.InputStream; | |
| 31 import java.io.OutputStream; | |
| 32 import java.io.IOException; | |
| 33 | |
| 34 /** | |
| 35 * The URLDataSource class provides an object that wraps a <code>URL</code> | |
| 36 * object in a DataSource interface. URLDataSource simplifies the handling | |
| 37 * of data described by URLs within the JavaBeans Activation Framework | |
| 38 * because this class can be used to create new DataHandlers. <i>NOTE: The | |
| 39 * DataHandler object creates a URLDataSource internally, | |
| 40 * when it is constructed with a URL.</i> | |
| 41 * | |
| 42 * @see javax.activation.DataSource | |
| 43 * @see javax.activation.DataHandler | |
| 44 * | |
| 45 * @since 1.6 | |
| 46 */ | |
| 47 public class URLDataSource implements DataSource { | |
| 48 private URL url = null; | |
| 49 private URLConnection url_conn = null; | |
| 50 | |
| 51 /** | |
| 52 * URLDataSource constructor. The URLDataSource class will | |
| 53 * not open a connection to the URL until a method requiring it | |
| 54 * to do so is called. | |
| 55 * | |
| 56 * @param url The URL to be encapsulated in this object. | |
| 57 */ | |
| 58 public URLDataSource(URL url) { | |
| 59 this.url = url; | |
| 60 } | |
| 61 | |
| 62 /** | |
| 63 * Returns the value of the URL content-type header field. | |
| 64 * It calls the URL's <code>URLConnection.getContentType</code> method | |
| 65 * after retrieving a URLConnection object. | |
| 66 * <i>Note: this method attempts to call the <code>openConnection</code> | |
| 67 * method on the URL. If this method fails, or if a content type is not | |
| 68 * returned from the URLConnection, getContentType returns | |
| 69 * "application/octet-stream" as the content type.</i> | |
| 70 * | |
| 71 * @return the content type. | |
| 72 */ | |
| 73 public String getContentType() { | |
| 74 String type = null; | |
| 75 | |
| 76 try { | |
| 77 if (url_conn == null) | |
| 78 url_conn = url.openConnection(); | |
| 79 } catch (IOException e) { } | |
| 80 | |
| 81 if (url_conn != null) | |
| 82 type = url_conn.getContentType(); | |
| 83 | |
| 84 if (type == null) | |
| 85 type = "application/octet-stream"; | |
| 86 | |
| 87 return type; | |
| 88 } | |
| 89 | |
| 90 /** | |
| 91 * Calls the <code>getFile</code> method on the URL used to | |
| 92 * instantiate the object. | |
| 93 * | |
| 94 * @return the result of calling the URL's getFile method. | |
| 95 */ | |
| 96 public String getName() { | |
| 97 return url.getFile(); | |
| 98 } | |
| 99 | |
| 100 /** | |
| 101 * The getInputStream method from the URL. Calls the | |
| 102 * <code>openStream</code> method on the URL. | |
| 103 * | |
| 104 * @return the InputStream. | |
| 105 */ | |
| 106 public InputStream getInputStream() throws IOException { | |
| 107 return url.openStream(); | |
| 108 } | |
| 109 | |
| 110 /** | |
| 111 * The getOutputStream method from the URL. First an attempt is | |
| 112 * made to get the URLConnection object for the URL. If that | |
| 113 * succeeds, the getOutputStream method on the URLConnection | |
| 114 * is returned. | |
| 115 * | |
| 116 * @return the OutputStream. | |
| 117 */ | |
| 118 public OutputStream getOutputStream() throws IOException { | |
| 119 // get the url connection if it is available | |
| 120 url_conn = url.openConnection(); | |
| 121 | |
| 122 if (url_conn != null) { | |
| 123 url_conn.setDoOutput(true); | |
| 124 return url_conn.getOutputStream(); | |
| 125 } else | |
| 126 return null; | |
| 127 } | |
| 128 | |
| 129 /** | |
| 130 * Return the URL used to create this DataSource. | |
| 131 * | |
| 132 * @return The URL. | |
| 133 */ | |
| 134 public URL getURL() { | |
| 135 return url; | |
| 136 } | |
| 137 } |
