1 /*
2 * Copyright 2006 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.springframework.oxm.xstream;
18
19 import com.thoughtworks.xstream.alias.CannotResolveClassException;
20 import com.thoughtworks.xstream.converters.ConversionException;
21 import com.thoughtworks.xstream.io.StreamException;
22 import org.springframework.oxm.XmlMappingException;
23
24 /**
25 * Generic utility methods for working with XStream. Mainly for internal use within the framework.
26 *
27 * @author Arjen Poutsma
28 * @since 1.0.0
29 */
30 public abstract class XStreamUtils {
31
32 /**
33 * Converts the given XStream exception to an appropriate exception from the <code>org.springframework.oxm</code>
34 * hierarchy.
35 * <p/>
36 * A boolean flag is used to indicate whether this exception occurs during marshalling or unmarshalling, since
37 * XStream itself does not make this distinction in its exception hierarchy.
38 *
39 * @param ex XStream exception that occured
40 * @param marshalling indicates whether the exception occurs during marshalling (<code>true</code>), or
41 * unmarshalling (<code>false</code>)
42 * @return the corresponding <code>XmlMappingException</code>
43 */
44 public static XmlMappingException convertXStreamException(Exception ex, boolean marshalling) {
45 if (ex instanceof StreamException) {
46 if (marshalling) {
47 return new XStreamMarshallingFailureException((StreamException) ex);
48 }
49 else {
50 return new XStreamUnmarshallingFailureException((StreamException) ex);
51 }
52 }
53 else if (ex instanceof CannotResolveClassException) {
54 if (marshalling) {
55 return new XStreamMarshallingFailureException((CannotResolveClassException) ex);
56 }
57 else {
58 return new XStreamUnmarshallingFailureException((CannotResolveClassException) ex);
59 }
60 }
61 else if (ex instanceof ConversionException) {
62 if (marshalling) {
63 return new XStreamMarshallingFailureException((ConversionException) ex);
64 }
65 else {
66 return new XStreamUnmarshallingFailureException((ConversionException) ex);
67 }
68 }
69 // fallback
70 return new XStreamSystemException("Unknown XStream exception: " + ex.getMessage(), ex);
71 }
72
73 }