jaxws/src/share/classes/javax/activation/URLDataSource.java
changeset 8 474761f14bca
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxws/src/share/classes/javax/activation/URLDataSource.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,137 @@
+/*
+ * Copyright 1997-2005 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package javax.activation;
+
+import java.net.URL;
+import java.net.URLConnection;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+/**
+ * The URLDataSource class provides an object that wraps a <code>URL</code>
+ * object in a DataSource interface. URLDataSource simplifies the handling
+ * of data described by URLs within the JavaBeans Activation Framework
+ * because this class can be used to create new DataHandlers. <i>NOTE: The
+ * DataHandler object creates a URLDataSource internally,
+ * when it is constructed with a URL.</i>
+ *
+ * @see javax.activation.DataSource
+ * @see javax.activation.DataHandler
+ *
+ * @since 1.6
+ */
+public class URLDataSource implements DataSource {
+    private URL url = null;
+    private URLConnection url_conn = null;
+
+    /**
+     * URLDataSource constructor. The URLDataSource class will
+     * not open a connection to the URL until a method requiring it
+     * to do so is called.
+     *
+     * @param url The URL to be encapsulated in this object.
+     */
+    public URLDataSource(URL url) {
+        this.url = url;
+    }
+
+    /**
+     * Returns the value of the URL content-type header field.
+     * It calls the URL's <code>URLConnection.getContentType</code> method
+     * after retrieving a URLConnection object.
+     * <i>Note: this method attempts to call the <code>openConnection</code>
+     * method on the URL. If this method fails, or if a content type is not
+     * returned from the URLConnection, getContentType returns
+     * "application/octet-stream" as the content type.</i>
+     *
+     * @return the content type.
+     */
+    public String getContentType() {
+        String type = null;
+
+        try {
+            if (url_conn == null)
+                url_conn = url.openConnection();
+        } catch (IOException e) { }
+
+        if (url_conn != null)
+            type = url_conn.getContentType();
+
+        if (type == null)
+            type = "application/octet-stream";
+
+        return type;
+    }
+
+    /**
+     * Calls the <code>getFile</code> method on the URL used to
+     * instantiate the object.
+     *
+     * @return the result of calling the URL's getFile method.
+     */
+    public String getName() {
+        return url.getFile();
+    }
+
+    /**
+     * The getInputStream method from the URL. Calls the
+     * <code>openStream</code> method on the URL.
+     *
+     * @return the InputStream.
+     */
+    public InputStream getInputStream() throws IOException {
+        return url.openStream();
+    }
+
+    /**
+     * The getOutputStream method from the URL. First an attempt is
+     * made to get the URLConnection object for the URL. If that
+     * succeeds, the getOutputStream method on the URLConnection
+     * is returned.
+     *
+     * @return the OutputStream.
+     */
+    public OutputStream getOutputStream() throws IOException {
+        // get the url connection if it is available
+        url_conn = url.openConnection();
+
+        if (url_conn != null) {
+            url_conn.setDoOutput(true);
+            return url_conn.getOutputStream();
+        } else
+            return null;
+    }
+
+    /**
+     * Return the URL used to create this DataSource.
+     *
+     * @return The URL.
+     */
+    public URL getURL() {
+        return url;
+    }
+}