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org.apache.torque.util.VillageUtils |
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1 | package org.apache.torque.util; |
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2 | ||
3 | /* |
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4 | * Licensed to the Apache Software Foundation (ASF) under one |
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5 | * or more contributor license agreements. See the NOTICE file |
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6 | * distributed with this work for additional information |
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7 | * regarding copyright ownership. The ASF licenses this file |
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8 | * to you under the Apache License, Version 2.0 (the |
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9 | * "License"); you may not use this file except in compliance |
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10 | * with the License. You may obtain a copy of the License at |
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11 | * |
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12 | * http://www.apache.org/licenses/LICENSE-2.0 |
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13 | * |
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14 | * Unless required by applicable law or agreed to in writing, |
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15 | * software distributed under the License is distributed on an |
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16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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17 | * KIND, either express or implied. See the License for the |
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18 | * specific language governing permissions and limitations |
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19 | * under the License. |
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20 | */ |
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21 | ||
22 | import java.io.BufferedOutputStream; |
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23 | import java.io.ByteArrayOutputStream; |
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24 | import java.io.ObjectOutputStream; |
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25 | import java.io.OutputStream; |
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26 | import java.io.Serializable; |
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27 | import java.math.BigDecimal; |
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28 | import java.util.Hashtable; |
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29 | import java.util.Iterator; |
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30 | import java.util.Map; |
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31 | ||
32 | import org.apache.commons.logging.Log; |
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33 | import org.apache.commons.logging.LogFactory; |
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34 | import org.apache.torque.om.SimpleKey; |
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35 | ||
36 | import com.workingdogs.village.QueryDataSet; |
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37 | import com.workingdogs.village.Record; |
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38 | import com.workingdogs.village.TableDataSet; |
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39 | ||
40 | /** |
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41 | * Some Village related code factored out of the BasePeer. |
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42 | * |
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43 | * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> |
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44 | * @version $Id: VillageUtils.java 476550 2006-11-18 16:08:37Z tfischer $ |
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45 | */ |
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46 | public final class VillageUtils |
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47 | { |
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48 | /** The log. */ |
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49 | 0 | private static Log log = LogFactory.getLog(VillageUtils.class); |
50 | ||
51 | /** |
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52 | * Private constructor to prevent instantiation. |
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53 | * |
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54 | * Class contains only static method ans should therefore not be |
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55 | * instantiated. |
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56 | */ |
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57 | private VillageUtils() |
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58 | 0 | { |
59 | 0 | } |
60 | ||
61 | /** |
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62 | * Convenience Method to close a Table Data Set without |
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63 | * Exception check. |
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64 | * |
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65 | * @param tds A TableDataSet |
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66 | */ |
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67 | public static final void close(class="keyword">final TableDataSet tds) |
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68 | { |
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69 | 0 | if (tds != null) |
70 | { |
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71 | try |
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72 | { |
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73 | 0 | tds.close(); |
74 | } |
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75 | 0 | catch (Exception ignored) |
76 | { |
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77 | 0 | log.debug("Caught exception when closing a TableDataSet", |
78 | ignored); |
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79 | 0 | } |
80 | } |
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81 | 0 | } |
82 | ||
83 | /** |
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84 | * Convenience Method to close a Table Data Set without |
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85 | * Exception check. |
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86 | * |
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87 | * @param qds A TableDataSet |
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88 | */ |
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89 | public static final void close(class="keyword">final QueryDataSet qds) |
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90 | { |
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91 | 0 | if (qds != null) |
92 | { |
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93 | try |
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94 | { |
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95 | 0 | qds.close(); |
96 | } |
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97 | 0 | catch (Exception ignored) |
98 | { |
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99 | 0 | log.debug("Caught exception when closing a QueryDataSet", |
100 | ignored); |
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101 | 0 | } |
102 | } |
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103 | 0 | } |
104 | ||
105 | /** |
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106 | * Convenience Method to close an Output Stream without |
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107 | * Exception check. |
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108 | * |
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109 | * @param os An OutputStream |
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110 | */ |
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111 | public static final void close(class="keyword">final OutputStream os) |
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112 | { |
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113 | try |
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114 | { |
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115 | 0 | if (os != null) |
116 | { |
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117 | 0 | os.close(); |
118 | } |
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119 | } |
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120 | 0 | catch (Exception ignored) |
121 | { |
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122 | 0 | log.debug("Caught exception when closing an OutputStream", |
123 | ignored); |
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124 | 0 | } |
125 | 0 | } |
126 | ||
127 | /** |
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128 | * Converts a hashtable to a byte array for storage/serialization. |
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129 | * |
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130 | * @param hash The Hashtable to convert. |
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131 | * @return A byte[] with the converted Hashtable. |
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132 | * @throws Exception If an error occurs. |
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133 | */ |
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134 | public static final byte[] hashtableToByteArray(class="keyword">final Hashtable hash) |
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135 | throws Exception |
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136 | { |
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137 | 0 | Hashtable saveData = new Hashtable(hash.size()); |
138 | 0 | byte[] byteArray = null; |
139 | ||
140 | 0 | Iterator keys = hash.entrySet().iterator(); |
141 | 0 | while (keys.hasNext()) |
142 | { |
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143 | 0 | Map.Entry entry = (Map.Entry) keys.next(); |
144 | 0 | if (entry.getValue() instanceof Serializable) |
145 | { |
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146 | 0 | saveData.put(entry.getKey(), entry.getValue()); |
147 | } |
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148 | 0 | } |
149 | ||
150 | 0 | ByteArrayOutputStream baos = null; |
151 | 0 | BufferedOutputStream bos = null; |
152 | 0 | ObjectOutputStream out = null; |
153 | try |
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154 | { |
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155 | // These objects are closed in the finally. |
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156 | 0 | baos = new ByteArrayOutputStream(); |
157 | 0 | bos = new BufferedOutputStream(baos); |
158 | 0 | out = new ObjectOutputStream(bos); |
159 | ||
160 | 0 | out.writeObject(saveData); |
161 | ||
162 | 0 | out.flush(); |
163 | 0 | bos.flush(); |
164 | 0 | baos.flush(); |
165 | 0 | byteArray = baos.toByteArray(); |
166 | } |
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167 | finally |
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168 | { |
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169 | 0 | close(out); |
170 | 0 | close(bos); |
171 | 0 | close(baos); |
172 | 0 | } |
173 | 0 | return byteArray; |
174 | } |
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175 | ||
176 | /** |
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177 | * Factored out setting of a Village Record column from a Criteria Key |
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178 | * |
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179 | * @param crit The Criteria |
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180 | * @param key The Criterion Key |
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181 | * @param rec The Village Record |
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182 | * @param colName The name of the Column in the Record |
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183 | */ |
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184 | public static final void setVillageValue(class="keyword">final Criteria crit, |
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185 | final String key, |
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186 | final Record rec, |
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187 | final String colName) |
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188 | throws Exception |
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189 | { |
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190 | // A village Record.setValue( String, Object ) would |
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191 | // be nice here. |
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192 | 0 | Object obj = crit.getValue(key); |
193 | 0 | if (obj instanceof SimpleKey) |
194 | { |
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195 | 0 | obj = ((SimpleKey) obj).getValue(); |
196 | } |
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197 | 0 | if (obj == null) |
198 | { |
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199 | 0 | rec.setValueNull(colName); |
200 | 0 | } |
201 | 0 | else if (obj instanceof String) |
202 | { |
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203 | 0 | rec.setValue(colName, (String) obj); |
204 | 0 | } |
205 | 0 | else if (obj instanceof Integer) |
206 | { |
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207 | 0 | rec.setValue(colName, |
208 | crit.getInt(key)); |
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209 | 0 | } |
210 | 0 | else if (obj instanceof BigDecimal) |
211 | { |
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212 | 0 | rec.setValue(colName, (BigDecimal) obj); |
213 | 0 | } |
214 | 0 | else if (obj instanceof Boolean) |
215 | { |
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216 | 0 | rec.setValue(colName, |
217 | ((Boolean) obj).booleanValue()); |
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218 | 0 | } |
219 | 0 | else if (obj instanceof java.util.Date) |
220 | { |
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221 | 0 | rec.setValue(colName, |
222 | (java.util.Date) obj); |
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223 | 0 | } |
224 | 0 | else if (obj instanceof Float) |
225 | { |
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226 | 0 | rec.setValue(colName, |
227 | crit.getFloat(key)); |
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228 | 0 | } |
229 | 0 | else if (obj instanceof Double) |
230 | { |
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231 | 0 | rec.setValue(colName, |
232 | crit.getDouble(key)); |
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233 | 0 | } |
234 | 0 | else if (obj instanceof Byte) |
235 | { |
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236 | 0 | rec.setValue(colName, |
237 | ((Byte) obj).byteValue()); |
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238 | 0 | } |
239 | 0 | else if (obj instanceof Long) |
240 | { |
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241 | 0 | rec.setValue(colName, |
242 | crit.getLong(key)); |
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243 | 0 | } |
244 | 0 | else if (obj instanceof Short) |
245 | { |
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246 | 0 | rec.setValue(colName, |
247 | ((Short) obj).shortValue()); |
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248 | 0 | } |
249 | 0 | else if (obj instanceof Hashtable) |
250 | { |
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251 | 0 | rec.setValue(colName, |
252 | hashtableToByteArray((Hashtable) obj)); |
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253 | 0 | } |
254 | 0 | else if (obj instanceof byte[]) |
255 | { |
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256 | 0 | rec.setValue(colName, (byte[]) obj); |
257 | } |
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258 | 0 | } |
259 | } |
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