View Javadoc
1   /*
2    * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package com.sun.xml.internal.ws.client;
27  
28  /**
29   * Content negotiation enum.
30   * <p>
31   * A value of {@link #none} means no content negotation at level of the
32   * client transport will be performed to negotiate the encoding of XML infoset.
33   * The default encoding will always be used.
34   * <p>
35   * A value of {@link #pessimistic} means the client transport will assume
36   * the default encoding of XML infoset for an outbound message unless informed
37   * otherwise by a previously received inbound message.
38   * (The client transport initially and pessimistically assumes that a service
39   * does not support anything other than the default encoding of XML infoset.)
40   * <p>
41   * A value of {@link #optimistic} means the client transport will assume
42   * a non-default encoding of XML infoset for an outbound message.
43   * (The client transport optimistically assumes that a service
44   * supports the non-default encoding of XML infoset.)
45   *
46   * @author Paul.Sandoz@Sun.Com
47   */
48  public enum ContentNegotiation {
49      none,
50      pessimistic,
51      optimistic;
52  
53      /**
54       * Property name for content negotiation on {@link RequestContext}.
55       */
56      public static final String PROPERTY = "com.sun.xml.internal.ws.client.ContentNegotiation";
57  
58      /**
59       * Obtain the content negotiation value from a system property.
60       * <p>
61       * This method will never throw a runtime exception.
62       *
63       * @return the content negotiation value.
64       */
65      public static ContentNegotiation obtainFromSystemProperty() {
66          try {
67              String value = System.getProperty(PROPERTY);
68  
69              if (value == null) {
70                  return none;
71              }
72  
73              return valueOf(value);
74          } catch (Exception e) {
75              // Default to none for any unrecognized value or any other
76              // runtime exception thrown
77              return none;
78          }
79      }
80  }