1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaf_classes/javax/activation/URLDataSource.java Wed Apr 27 01:27:09 2016 +0800
1.3 @@ -0,0 +1,137 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package javax.activation;
1.30 +
1.31 +import java.net.URL;
1.32 +import java.net.URLConnection;
1.33 +import java.io.InputStream;
1.34 +import java.io.OutputStream;
1.35 +import java.io.IOException;
1.36 +
1.37 +/**
1.38 + * The URLDataSource class provides an object that wraps a <code>URL</code>
1.39 + * object in a DataSource interface. URLDataSource simplifies the handling
1.40 + * of data described by URLs within the JavaBeans Activation Framework
1.41 + * because this class can be used to create new DataHandlers. <i>NOTE: The
1.42 + * DataHandler object creates a URLDataSource internally,
1.43 + * when it is constructed with a URL.</i>
1.44 + *
1.45 + * @see javax.activation.DataSource
1.46 + * @see javax.activation.DataHandler
1.47 + *
1.48 + * @since 1.6
1.49 + */
1.50 +public class URLDataSource implements DataSource {
1.51 + private URL url = null;
1.52 + private URLConnection url_conn = null;
1.53 +
1.54 + /**
1.55 + * URLDataSource constructor. The URLDataSource class will
1.56 + * not open a connection to the URL until a method requiring it
1.57 + * to do so is called.
1.58 + *
1.59 + * @param url The URL to be encapsulated in this object.
1.60 + */
1.61 + public URLDataSource(URL url) {
1.62 + this.url = url;
1.63 + }
1.64 +
1.65 + /**
1.66 + * Returns the value of the URL content-type header field.
1.67 + * It calls the URL's <code>URLConnection.getContentType</code> method
1.68 + * after retrieving a URLConnection object.
1.69 + * <i>Note: this method attempts to call the <code>openConnection</code>
1.70 + * method on the URL. If this method fails, or if a content type is not
1.71 + * returned from the URLConnection, getContentType returns
1.72 + * "application/octet-stream" as the content type.</i>
1.73 + *
1.74 + * @return the content type.
1.75 + */
1.76 + public String getContentType() {
1.77 + String type = null;
1.78 +
1.79 + try {
1.80 + if (url_conn == null)
1.81 + url_conn = url.openConnection();
1.82 + } catch (IOException e) { }
1.83 +
1.84 + if (url_conn != null)
1.85 + type = url_conn.getContentType();
1.86 +
1.87 + if (type == null)
1.88 + type = "application/octet-stream";
1.89 +
1.90 + return type;
1.91 + }
1.92 +
1.93 + /**
1.94 + * Calls the <code>getFile</code> method on the URL used to
1.95 + * instantiate the object.
1.96 + *
1.97 + * @return the result of calling the URL's getFile method.
1.98 + */
1.99 + public String getName() {
1.100 + return url.getFile();
1.101 + }
1.102 +
1.103 + /**
1.104 + * The getInputStream method from the URL. Calls the
1.105 + * <code>openStream</code> method on the URL.
1.106 + *
1.107 + * @return the InputStream.
1.108 + */
1.109 + public InputStream getInputStream() throws IOException {
1.110 + return url.openStream();
1.111 + }
1.112 +
1.113 + /**
1.114 + * The getOutputStream method from the URL. First an attempt is
1.115 + * made to get the URLConnection object for the URL. If that
1.116 + * succeeds, the getOutputStream method on the URLConnection
1.117 + * is returned.
1.118 + *
1.119 + * @return the OutputStream.
1.120 + */
1.121 + public OutputStream getOutputStream() throws IOException {
1.122 + // get the url connection if it is available
1.123 + url_conn = url.openConnection();
1.124 +
1.125 + if (url_conn != null) {
1.126 + url_conn.setDoOutput(true);
1.127 + return url_conn.getOutputStream();
1.128 + } else
1.129 + return null;
1.130 + }
1.131 +
1.132 + /**
1.133 + * Return the URL used to create this DataSource.
1.134 + *
1.135 + * @return The URL.
1.136 + */
1.137 + public URL getURL() {
1.138 + return url;
1.139 + }
1.140 +}
