| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hivetranse.exception; |
| 16 | |
| 17 | import java.sql.SQLException; |
| 18 | import java.util.HashMap; |
| 19 | import java.util.List; |
| 20 | import java.util.Map; |
| 21 | import java.util.StringTokenizer; |
| 22 | |
| 23 | import org.apache.commons.logging.Log; |
| 24 | import org.apache.commons.logging.LogFactory; |
| 25 | import org.apache.hivemind.Location; |
| 26 | import org.apache.hivemind.util.ConstructorUtils; |
| 27 | |
| 28 | import net.sourceforge.hiveutils.service.ExceptionMapper; |
| 29 | |
| 30 | /** |
| 31 | * |
| 32 | * @author Jean-Francois Poilpret |
| 33 | */ |
| 34 | public class SqlExceptionMapper implements ExceptionMapper |
| 35 | { |
| 36 | public SqlExceptionMapper(List<SqlCodesMappingContribution> config) |
| 37 | { |
| 38 | this(LogFactory.getLog(SqlExceptionMapper.class), config); |
| 39 | } |
| 40 | |
| 41 | public SqlExceptionMapper(Log logger, List<SqlCodesMappingContribution> config) |
| 42 | { |
| 43 | _logger = logger; |
| 44 | for (SqlCodesMappingContribution contrib: config) |
| 45 | { |
| 46 | // Add codes list to _classes |
| 47 | addMapping(contrib); |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | public Throwable translate(Throwable t) |
| 52 | { |
| 53 | if (t instanceof SQLException) |
| 54 | { |
| 55 | SQLException e = (SQLException) t; |
| 56 | Class clazz; |
| 57 | // First check if a specific mapping exists (by a subclass) |
| 58 | clazz = preTranslate(e); |
| 59 | if (clazz != null) |
| 60 | { |
| 61 | return buildException(e, clazz); |
| 62 | } |
| 63 | // Then check if a mapping exists for the ErrorCode |
| 64 | clazz = findCode(e.getErrorCode()); |
| 65 | if (clazz != null) |
| 66 | { |
| 67 | return buildException(e, clazz); |
| 68 | } |
| 69 | // Then check if a mapping exists for the SqlState or a part of it |
| 70 | clazz = findState(e.getSQLState()); |
| 71 | if (clazz != null) |
| 72 | { |
| 73 | return buildException(e, clazz); |
| 74 | } |
| 75 | return buildException(e, UnknownDataAccessException.class); |
| 76 | } |
| 77 | else |
| 78 | { |
| 79 | return t; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | protected void addMapping(SqlCodesMappingContribution contrib) |
| 84 | { |
| 85 | if (contrib.getCodes() != null) |
| 86 | { |
| 87 | addCodesMapping(contrib.getClazz(), contrib.getCodes(), contrib.getLocation()); |
| 88 | } |
| 89 | if (contrib.getStates() != null) |
| 90 | { |
| 91 | addStatesMapping(contrib.getClazz(), contrib.getStates()); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | protected void addCodesMapping(Class clazz, String codes, Location location) |
| 96 | { |
| 97 | // Parse codes list |
| 98 | StringTokenizer tokenize = new StringTokenizer(codes, ", \t\n\r"); |
| 99 | int i = 0; |
| 100 | String token = null; |
| 101 | while (tokenize.hasMoreTokens()) |
| 102 | { |
| 103 | try |
| 104 | { |
| 105 | i++; |
| 106 | token = tokenize.nextToken(); |
| 107 | // Also allow ranges min:max |
| 108 | int index = token.indexOf(':'); |
| 109 | if (index == -1) |
| 110 | { |
| 111 | Integer code = Integer.valueOf(token); |
| 112 | _codes.put(code, clazz); |
| 113 | } |
| 114 | else if (index == 0 || index == token.length() - 1) |
| 115 | { |
| 116 | _logger.warn( "addCodesMapping() could not add item[" + i + |
| 117 | "] (" + token + ") from configuration " + |
| 118 | location); |
| 119 | } |
| 120 | else |
| 121 | { |
| 122 | int min = Integer.parseInt(token.substring(0, index)); |
| 123 | int max = Integer.parseInt(token.substring(index + 1)); |
| 124 | if (min < max) |
| 125 | { |
| 126 | for (int code = min; code <= max; code++) |
| 127 | { |
| 128 | _codes.put(code, clazz); |
| 129 | } |
| 130 | } |
| 131 | else |
| 132 | { |
| 133 | _logger.warn( "addCodesMapping() could not add item[" + i + |
| 134 | "] (" + token + ") from configuration " + |
| 135 | location + " [min=" + min + ",max=" + max); |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | catch (NumberFormatException e) |
| 140 | { |
| 141 | _logger.warn( "addCodesMapping() could not add item[" + i + |
| 142 | "] (" + token + ") from configuration " + |
| 143 | location, e); |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | protected void addStatesMapping(Class clazz, String states) |
| 149 | { |
| 150 | // Parse status list |
| 151 | StringTokenizer tokenize = new StringTokenizer(states, ", \t\n\r"); |
| 152 | while (tokenize.hasMoreTokens()) |
| 153 | { |
| 154 | String state = tokenize.nextToken(); |
| 155 | _states.put(state, clazz); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | protected Class findCode(int code) |
| 160 | { |
| 161 | return _codes.get(code); |
| 162 | } |
| 163 | |
| 164 | protected Class findState(String state) |
| 165 | { |
| 166 | if (state == null) |
| 167 | { |
| 168 | return null; |
| 169 | } |
| 170 | |
| 171 | // Search exact state, then partial state |
| 172 | for (int i = state.length(); i > 0; i--) |
| 173 | { |
| 174 | Class clazz = _states.get(state.substring(0, i)); |
| 175 | if (clazz != null) |
| 176 | { |
| 177 | return clazz; |
| 178 | } |
| 179 | } |
| 180 | return null; |
| 181 | } |
| 182 | |
| 183 | protected Throwable buildException(SQLException e, Class clazz) |
| 184 | { |
| 185 | return (Throwable) ConstructorUtils.invokeConstructor( |
| 186 | clazz, new Object[]{e.getMessage(), e}); |
| 187 | } |
| 188 | |
| 189 | // Can be overridden |
| 190 | protected Class preTranslate(SQLException e) |
| 191 | { |
| 192 | return null; |
| 193 | } |
| 194 | |
| 195 | private final Log _logger; |
| 196 | // Map ErrorCode -> class |
| 197 | protected final Map<Integer, Class> _codes = new HashMap<Integer, Class>(); |
| 198 | // Map SQLState -> class |
| 199 | protected final Map<String, Class> _states = new HashMap<String, Class>(); |
| 200 | } |