/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package javax.activation; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; import java.net.URLConnection; /** * @version $Rev$ $Date$ */ public class URLDataSource implements DataSource { private final static String DEFAULT_CONTENT_TYPE = "application/octet-stream"; private final URL url; /** * Creates a URLDataSource from a URL object. */ public URLDataSource(URL url) { this.url = url; } /** * Returns the value of the URL content-type header field. * This method calls URL.openConnection() to obtain a connection * from which to obtain the content type. If this fails or * a getContentType() returns null then "application/octet-stream" * is returned. */ public String getContentType() { try { URLConnection connection = url.openConnection(); String type = connection.getContentType(); return type == null ? DEFAULT_CONTENT_TYPE : type; } catch (IOException e) { return DEFAULT_CONTENT_TYPE; } } /** * Returns the file name of the URL object. * @return the name as returned by URL.getFile() */ public String getName() { return url.getFile(); } /** * Returns an InputStream obtained from the URL. * @return the InputStream from URL.openStream() */ public InputStream getInputStream() throws IOException { return url.openStream(); } /** * Returns an OutputStream obtained from the URL. */ public OutputStream getOutputStream() throws IOException { URLConnection connection = url.openConnection(); connection.setDoOutput(true); return connection.getOutputStream(); } /** * Returns the URL of the data source. */ public URL getURL() { return url; } }