01: /*
02: * Copyright 2002-2006 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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.core;
18:
19: /**
20: * Helper class for implementing exception classes which are capable of
21: * holding nested exceptions. Necessary because we can't share a base
22: * class among different exception types.
23: *
24: * <p>Mainly for use within the framework.
25: *
26: * @author Juergen Hoeller
27: * @since 2.0
28: * @see NestedRuntimeException
29: * @see NestedCheckedException
30: * @see NestedIOException
31: * @see org.springframework.web.util.NestedServletException
32: */
33: public abstract class NestedExceptionUtils {
34:
35: /**
36: * Build a message for the given base message and root cause.
37: * @param message the base message
38: * @param cause the root cause
39: * @return the full exception message
40: */
41: public static String buildMessage(String message, Throwable cause) {
42: if (cause != null) {
43: StringBuffer buf = new StringBuffer();
44: if (message != null) {
45: buf.append(message).append("; ");
46: }
47: buf.append("nested exception is ").append(cause);
48: return buf.toString();
49: } else {
50: return message;
51: }
52: }
53:
54: }
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