1 //
2 // ========================================================================
3 // Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.client.api;
20
21 import java.nio.ByteBuffer;
22
23 import org.eclipse.jetty.client.util.ByteBufferContentProvider;
24 import org.eclipse.jetty.client.util.PathContentProvider;
25
26 /**
27 * {@link ContentProvider} provides a repeatable source of request content.
28 * <p />
29 * Implementations should return a new "view" over the same content every time {@link #iterator()} is invoked.
30 * <p />
31 * Applications should rely on utility classes such as {@link ByteBufferContentProvider}
32 * or {@link PathContentProvider}.
33 */
34 public interface ContentProvider extends Iterable<ByteBuffer>
35 {
36 /**
37 * @return the content length, if known, or -1 if the content length is unknown
38 */
39 long getLength();
40 }