1 | package com.framsticks.params; |
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2 | |
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3 | import java.lang.reflect.Field; |
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4 | import java.lang.reflect.InvocationTargetException; |
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5 | import java.util.List; |
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6 | |
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7 | import com.framsticks.params.types.ListParam; |
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8 | import org.apache.log4j.Logger; |
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9 | |
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10 | |
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11 | /** |
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12 | * The Class ReflectionAccess. Stores data in provided object using reflection. |
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13 | * |
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14 | * @author Mateusz Jarus <name.surname@gmail.com> (please replace name and |
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15 | * surname with my personal data) |
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16 | * |
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17 | * @author Piotr Sniegowski |
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18 | */ |
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19 | public class ReflectionAccess extends SimpleAbstractAccess { |
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20 | private final static Logger LOGGER = Logger.getLogger(ReflectionAccess.class |
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21 | .getName()); |
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22 | |
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23 | |
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24 | protected final Class reflectedClass; |
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25 | private Object object; |
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26 | |
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27 | public ReflectionAccess(Class reflectedClass, FramsClass framsClass) { |
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28 | this.reflectedClass = reflectedClass; |
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29 | setFramsClass(framsClass); |
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30 | } |
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31 | |
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32 | private static String accessorName(boolean get, String id) { |
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33 | return (get ? "get" : "set") + id.substring(0, 1).toUpperCase() + id.substring(1); |
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34 | } |
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35 | |
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36 | @Override |
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37 | public <T> T get(Param param, Class<T> type) { |
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38 | if (object == null) { |
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39 | return null; |
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40 | } |
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41 | try { |
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42 | //TODO: use internal id, if present |
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43 | String id = param.getId(); |
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44 | try { |
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45 | return type.cast(object.getClass().getField(id).get(object)); |
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46 | } catch (NoSuchFieldException ignored) { |
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47 | } |
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48 | try { |
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49 | return type.cast(object.getClass().getMethod(accessorName(true, id)).invoke(object)); |
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50 | } catch (NoSuchMethodException ex) { |
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51 | //ex.printStackTrace(); |
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52 | } catch (InvocationTargetException e) { |
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53 | //e.printStackTrace(); |
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54 | } |
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55 | |
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56 | } catch (IllegalAccessException ex) { |
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57 | LOGGER.warn("illegal access error occurred while trying to access returnedObject"); |
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58 | ex.printStackTrace(); |
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59 | } catch (ClassCastException ignored) { |
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60 | |
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61 | } |
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62 | return null; |
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63 | } |
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64 | |
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65 | @Override |
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66 | protected <T> void internalSet(Param param, T value) { |
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67 | setValue(param, value); |
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68 | } |
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69 | |
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70 | private <T> void setValue(Param param, T val) { |
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71 | if (object == null) { |
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72 | return; |
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73 | } |
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74 | try { |
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75 | String id = param.getId(); |
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76 | try { |
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77 | object.getClass().getField(id).set(object, val); |
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78 | return; |
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79 | } catch (NoSuchFieldException ignored) { |
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80 | } |
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81 | try { |
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82 | object.getClass().getMethod(accessorName(false, id), new Class[]{val.getClass()}).invoke(object, val); |
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83 | } catch (InvocationTargetException e) { |
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84 | //e.printStackTrace(); |
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85 | } catch (NoSuchMethodException ignored) { |
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86 | } |
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87 | } catch (IllegalAccessException ex) { |
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88 | LOGGER.warn("illegal access error occurred while trying to access returnedObject"); |
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89 | ex.printStackTrace(); |
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90 | } |
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91 | } |
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92 | |
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93 | void resetErrors() { |
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94 | //TODO this replaces returnedObject.resetErrors(); |
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95 | } |
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96 | |
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97 | @Override |
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98 | public void clearValues() { |
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99 | if (object == null) { |
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100 | return; |
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101 | } |
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102 | |
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103 | resetErrors(); |
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104 | |
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105 | Field[] fields; |
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106 | try { |
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107 | // TODO: conceptually invalid - should clean only fields that are specified in FramsClass |
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108 | fields = object.getClass().getFields(); |
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109 | |
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110 | for (Field field : fields) { |
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111 | field.set(object, null); |
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112 | } |
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113 | } catch (IllegalAccessException ex) { |
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114 | LOGGER.warn("IllegalAccessException thrown while trying to reset object values"); |
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115 | ex.printStackTrace(); |
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116 | } |
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117 | } |
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118 | |
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119 | /** |
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120 | * Sets the new object to operate on. |
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121 | * |
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122 | * @param object |
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123 | * new object to operate on |
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124 | */ |
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125 | @Override |
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126 | public void select(Object object) { |
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127 | this.object = object; |
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128 | } |
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129 | |
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130 | @Override |
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131 | public Object getSelected() { |
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132 | return object; |
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133 | } |
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134 | |
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135 | // TODO: find a better place for it |
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136 | public static String objectToString(Object object) { |
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137 | StringBuilder b = new StringBuilder(); |
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138 | for (Field f : object.getClass().getFields()) { |
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139 | b.append(f.getName()); |
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140 | b.append(":"); |
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141 | try { |
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142 | Object value = f.get(object); |
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143 | b.append((value != null) ? value.toString() : "<null>"); |
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144 | } catch (IllegalAccessException e) { |
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145 | e.printStackTrace(); |
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146 | } |
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147 | b.append("\n"); |
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148 | } |
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149 | return b.toString(); |
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150 | } |
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151 | |
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152 | |
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153 | @Override |
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154 | public ReflectionAccess cloneAccess() { |
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155 | return new ReflectionAccess(reflectedClass, framsClass); |
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156 | } |
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157 | |
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158 | @Override |
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159 | public Object createAccessee() { |
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160 | try { |
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161 | return reflectedClass.newInstance(); |
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162 | } catch (InstantiationException e) { |
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163 | e.printStackTrace(); |
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164 | } catch (IllegalAccessException e) { |
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165 | e.printStackTrace(); |
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166 | } |
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167 | LOGGER.fatal("failed to create reflected object of class " + reflectedClass.getCanonicalName() + " for frams type " + framsClass.getId()); |
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168 | |
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169 | return null; |
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170 | } |
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171 | } |
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