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org.apache.torque.manager.MethodCacheKey$Factory |
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1 | package org.apache.torque.manager; |
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2 | ||
3 | /* |
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4 | * Copyright 2001-2005 The Apache Software Foundation. |
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5 | * |
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6 | * Licensed under the Apache License, Version 2.0 (the "License") |
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7 | * you may not use this file except in compliance with the License. |
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8 | * You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | ||
19 | import java.io.Serializable; |
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20 | import org.apache.commons.lang.ObjectUtils; |
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21 | import org.apache.commons.pool.BasePoolableObjectFactory; |
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22 | import org.apache.torque.TorqueException; |
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23 | ||
24 | /** |
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25 | * @version $Id: MethodCacheKey.java 239630 2005-08-24 12:25:32Z henning $ |
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26 | */ |
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27 | public class MethodCacheKey implements Serializable |
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28 | { |
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29 | //private static final Category log = |
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30 | // Category.getInstance("org.apache.torque"); |
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31 | ||
32 | int n; |
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33 | private Serializable instanceOrClass; |
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34 | private String method; |
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35 | private Serializable arg1; |
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36 | private Serializable arg2; |
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37 | private Serializable arg3; |
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38 | private Serializable[] moreThanThree; |
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39 | private String groupKey; |
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40 | ||
41 | public MethodCacheKey() |
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42 | { |
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43 | } |
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44 | ||
45 | public MethodCacheKey(Serializable instanceOrClass, String method) |
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46 | { |
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47 | init(instanceOrClass, method); |
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48 | } |
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49 | ||
50 | public MethodCacheKey(Serializable instanceOrClass, String method, |
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51 | Serializable arg1) |
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52 | { |
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53 | init(instanceOrClass, method, arg1); |
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54 | } |
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55 | ||
56 | public MethodCacheKey(Serializable instanceOrClass, String method, |
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57 | Serializable arg1, Serializable arg2) |
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58 | { |
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59 | init(instanceOrClass, method, arg1, arg2); |
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60 | } |
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61 | ||
62 | public MethodCacheKey(Serializable instanceOrClass, String method, |
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63 | Serializable arg1, Serializable arg2, |
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64 | Serializable arg3) |
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65 | { |
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66 | init(instanceOrClass, method, arg1, arg2, arg3); |
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67 | } |
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68 | ||
69 | public MethodCacheKey(Serializable[] moreThanThree) |
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70 | { |
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71 | init(moreThanThree); |
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72 | } |
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73 | ||
74 | /** |
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75 | * Initialize key for method with no arguments. |
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76 | * |
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77 | * @param instanceOrClass the Object on which the method is invoked. if |
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78 | * the method is static, a String representing the class name is used. |
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79 | * @param method the method name |
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80 | */ |
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81 | public void init(Serializable instanceOrClass, String method) |
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82 | { |
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83 | n = 0; |
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84 | this.instanceOrClass = instanceOrClass; |
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85 | this.method = method; |
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86 | groupKey = instanceOrClass.toString() + method; |
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87 | } |
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88 | ||
89 | /** |
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90 | * Initialize key for method with one argument. |
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91 | * |
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92 | * @param instanceOrClass the Object on which the method is invoked. if |
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93 | * the method is static, a String representing the class name is used. |
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94 | * @param method the method name |
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95 | * @param arg1 first method arg, may be null |
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96 | */ |
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97 | public void init(Serializable instanceOrClass, String method, |
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98 | Serializable arg1) |
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99 | { |
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100 | init(instanceOrClass, method); |
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101 | n = 1; |
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102 | this.arg1 = arg1; |
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103 | } |
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104 | ||
105 | /** |
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106 | * Initialize key for method with two arguments. |
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107 | * |
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108 | * @param instanceOrClass the Object on which the method is invoked. if |
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109 | * the method is static, a String representing the class name is used. |
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110 | * @param method the method name |
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111 | * @param arg1 first method arg, may be null |
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112 | * @param arg2 second method arg, may be null |
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113 | */ |
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114 | public void init(Serializable instanceOrClass, String method, |
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115 | Serializable arg1, Serializable arg2) |
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116 | { |
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117 | init(instanceOrClass, method); |
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118 | n = 2; |
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119 | this.arg1 = arg1; |
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120 | this.arg2 = arg2; |
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121 | } |
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122 | ||
123 | ||
124 | /** |
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125 | * Initialize key for method with two arguments. |
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126 | * |
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127 | * @param instanceOrClass the Object on which the method is invoked. if |
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128 | * the method is static, a String representing the class name is used. |
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129 | * @param method the method name |
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130 | * @param arg1 first method arg, may be null |
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131 | * @param arg2 second method arg, may be null |
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132 | */ |
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133 | public void init(Serializable instanceOrClass, String method, |
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134 | Serializable arg1, Serializable arg2, |
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135 | Serializable arg3) |
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136 | { |
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137 | init(instanceOrClass, method); |
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138 | n = 3; |
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139 | this.arg1 = arg1; |
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140 | this.arg2 = arg2; |
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141 | this.arg3 = arg3; |
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142 | } |
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143 | ||
144 | /** |
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145 | * Initialize key for method with more than two arguments. |
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146 | * |
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147 | * @param keys Serializable[] where |
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148 | * [0]=>the Object on which the method is invoked |
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149 | * if the method is static, a String representing the class name is used. |
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150 | * [1]=>the method name |
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151 | * [n] where n>1 are the method arguments |
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152 | */ |
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153 | public void init(Serializable[] keys) |
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154 | { |
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155 | init(keys[0], (String) keys[1]); |
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156 | n = keys.length - 2; |
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157 | if (n > 0) |
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158 | { |
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159 | this.arg1 = keys[2]; |
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160 | if (n > 1) |
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161 | { |
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162 | this.arg2 = keys[3]; |
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163 | if (n > 2) |
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164 | { |
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165 | this.arg2 = keys[4]; |
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166 | if (n > 3) |
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167 | { |
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168 | this.moreThanThree = keys; |
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169 | } |
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170 | } |
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171 | } |
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172 | } |
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173 | } |
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174 | ||
175 | public String getGroupKey() |
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176 | { |
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177 | return groupKey; |
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178 | } |
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179 | ||
180 | public boolean equals(Object obj) |
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181 | { |
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182 | boolean equal = false; |
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183 | if (obj instanceof MethodCacheKey) |
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184 | { |
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185 | MethodCacheKey sck = (MethodCacheKey) obj; |
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186 | equal = (sck.n == n); |
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187 | equal &= ObjectUtils.equals(sck.method, method); |
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188 | equal &= ObjectUtils.equals(sck.instanceOrClass, instanceOrClass); |
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189 | if (equal && n > 0) |
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190 | { |
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191 | equal &= ObjectUtils.equals(sck.arg1, arg1); |
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192 | if (equal && n > 1) |
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193 | { |
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194 | equal &= ObjectUtils.equals(sck.arg2, arg2); |
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195 | if (equal && n > 2) |
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196 | { |
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197 | equal &= ObjectUtils.equals(sck.arg3, arg3); |
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198 | if (equal && n > 3) |
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199 | { |
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200 | for (int i = 5; i < n + 2; i++) |
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201 | { |
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202 | equal &= ObjectUtils.equals( |
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203 | sck.moreThanThree[i], moreThanThree[i]); |
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204 | } |
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205 | } |
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206 | } |
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207 | } |
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208 | } |
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209 | } |
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210 | ||
211 | return equal; |
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212 | } |
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213 | ||
214 | public int hashCode() |
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215 | { |
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216 | int h = instanceOrClass.hashCode(); |
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217 | h += method.hashCode(); |
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218 | if (n > 0) |
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219 | { |
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220 | h += (arg1 == null ? 0 : arg1.hashCode()); |
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221 | if (n > 1) |
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222 | { |
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223 | h += (arg2 == null ? 0 : arg2.hashCode()); |
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224 | if (n > 2) |
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225 | { |
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226 | h += (arg3 == null ? 0 : arg3.hashCode()); |
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227 | if (n > 3) |
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228 | { |
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229 | for (int i = 5; i < n + 2; i++) |
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230 | { |
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231 | h += (moreThanThree[i] == null ? 0 |
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232 | : moreThanThree[i].hashCode()); |
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233 | } |
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234 | } |
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235 | } |
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236 | } |
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237 | } |
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238 | return h; |
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239 | } |
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240 | ||
241 | public String toString() |
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242 | { |
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243 | StringBuffer sb = new StringBuffer(50); |
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244 | sb.append(instanceOrClass); |
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245 | sb.append("::"); |
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246 | sb.append(method).append('('); |
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247 | if (n > 0) |
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248 | { |
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249 | sb.append(arg1); |
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250 | if (n > 1) |
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251 | { |
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252 | sb.append(", ").append(arg2); |
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253 | if (n > 2) |
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254 | { |
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255 | sb.append(", ").append(arg3); |
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256 | if (n > 3) |
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257 | { |
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258 | for (int i = 5; i < n + 2; i++) |
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259 | { |
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260 | sb.append(", ").append(moreThanThree[i]); |
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261 | } |
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262 | } |
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263 | } |
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264 | } |
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265 | } |
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266 | sb.append(')'); |
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267 | return sb.toString(); |
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268 | } |
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269 | ||
270 | // ************* PoolableObjectFactory implementation ******************* |
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271 | ||
272 | 0 | public static class Factory |
273 | extends BasePoolableObjectFactory |
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274 | { |
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275 | /** |
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276 | * Creates an instance that can be returned by the pool. |
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277 | * @return an instance that can be returned by the pool. |
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278 | */ |
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279 | public Object makeObject() |
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280 | throws Exception |
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281 | { |
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282 | 0 | return new MethodCacheKey(); |
283 | } |
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284 | ||
285 | /** |
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286 | * Uninitialize an instance to be returned to the pool. |
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287 | * @param obj the instance to be passivated |
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288 | */ |
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289 | public void passivateObject(Object obj) |
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290 | throws Exception |
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291 | { |
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292 | 0 | MethodCacheKey key = (MethodCacheKey) obj; |
293 | 0 | if (key.instanceOrClass == null && key.method == class="keyword">null) |
294 | { |
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295 | 0 | throw new TorqueException( |
296 | "Attempted to return key to pool twice."); |
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297 | } |
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298 | 0 | key.instanceOrClass = null; |
299 | 0 | key.method = null; |
300 | 0 | key.arg1 = null; |
301 | 0 | key.arg2 = null; |
302 | 0 | key.arg3 = null; |
303 | 0 | key.moreThanThree = null; |
304 | 0 | key.groupKey = null; |
305 | 0 | } |
306 | } |
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307 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |