80 lines
2.8 KiB
Plaintext
80 lines
2.8 KiB
Plaintext
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.ByteArrayInputStream;
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import java.io.InputStream;
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import java.net.ContentHandlerFactory;
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import java.net.URL;
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import java.net.URLConnection;
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import java.net.URLStreamHandler;
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import java.net.URLStreamHandlerFactory;
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public class Test {
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public static void main(String[] args) throws Exception {
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if (args.length > 0) {
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String fqn = args[0];
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@SuppressWarnings("unchecked")
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Class<? extends ContentHandlerFactory> c =
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(Class<? extends ContentHandlerFactory>) Class.forName(fqn);
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ContentHandlerFactory f = c.newInstance();
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URLConnection.setContentHandlerFactory(f);
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}
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// One does not simply use a ContentHandler...
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// From an end user perspective ContentHandler is used indirectly
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// and it's more like SPI rather than API. So there's a certain amount
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// of preparations needs to be done beforehand.
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URLStreamHandlerFactory streamHandlerFactory =
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(protocol) ->
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new URLStreamHandler() {
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@Override
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protected URLConnection openConnection(URL u) {
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return newUrlConnection(u);
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}
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};
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URL.setURLStreamHandlerFactory(streamHandlerFactory);
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// Finally
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Object content = new URL("whatever:").getContent();
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System.out.println("Content class is: " + content.getClass());
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}
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private static URLConnection newUrlConnection(URL u) {
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return new URLConnection(u) {
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@Override public void connect() { }
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@Override
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public InputStream getInputStream() { return null; }
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@Override public String getContentType() { return "text/plain"; }
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};
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}
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}
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