01: /* Copyright (c) 2001-2007, The HSQL Development Group
02: * All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, are permitted provided that the following conditions are met:
06: *
07: * Redistributions of source code must retain the above copyright notice, this
08: * list of conditions and the following disclaimer.
09: *
10: * Redistributions in binary form must reproduce the above copyright notice,
11: * this list of conditions and the following disclaimer in the documentation
12: * and/or other materials provided with the distribution.
13: *
14: * Neither the name of the HSQL Development Group nor the names of its
15: * contributors may be used to endorse or promote products derived from this
16: * software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
22: * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30:
31: package org.hsqldb.util;
32:
33: import java.util.ArrayList;
34: import java.util.List;
35:
36: /**
37: * Allows additional messages to be appended.
38: *
39: * It often makes for better (and more efficient) design to add context
40: * details to an exception at intermediate points in the thread.
41: * This class makes it easy and efficient to catch and rethrow for that purpose.
42: */
43: public class AppendableException extends Exception {
44:
45: static final long serialVersionUID = -1002629580611098803L;
46: public static String LS = System.getProperty("line.separator");
47: public List appendages = null;
48:
49: public String getMessage() {
50:
51: String message = super .getMessage();
52:
53: if (appendages == null) {
54: return message;
55: }
56:
57: StringBuffer sb = new StringBuffer();
58:
59: if (message != null) {
60: sb.append(message);
61: }
62:
63: for (int i = 0; i < appendages.size(); i++) {
64: if (sb.length() > 0) {
65: sb.append(LS);
66: }
67:
68: sb.append(appendages.get(i));
69: }
70:
71: return sb.toString();
72: }
73:
74: public void appendMessage(String s) {
75:
76: if (appendages == null) {
77: appendages = new ArrayList();
78: }
79:
80: appendages.add(s);
81: }
82:
83: public AppendableException() {
84: }
85:
86: public AppendableException(String s) {
87: super (s);
88: }
89:
90: public AppendableException(Throwable cause) {
91: super (cause);
92: }
93:
94: public AppendableException(String string, Throwable cause) {
95: super(string, cause);
96: }
97: }
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