1 | package com.framsticks.params; |
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2 | |
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3 | import com.framsticks.params.types.UniqueListParam; |
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4 | import com.framsticks.util.FramsticksException; |
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5 | import com.framsticks.util.UnimplementedException; |
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6 | import com.framsticks.util.FramsticksUnsupportedOperationException; |
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7 | import com.framsticks.util.lang.Casting; |
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8 | import com.framsticks.util.lang.Numbers; |
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9 | import org.apache.logging.log4j.Logger; |
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10 | import org.apache.logging.log4j.LogManager; |
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11 | |
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12 | import java.util.*; |
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13 | |
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14 | /** |
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15 | * @author Piotr Sniegowski |
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16 | */ |
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17 | public class UniqueListAccess extends ListAccess { |
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18 | |
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19 | private static final Logger log = LogManager.getLogger(UniqueListAccess.class); |
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20 | |
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21 | Map<String, Object> map; |
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22 | |
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23 | protected final String uidName; |
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24 | protected final Access uidAccess; |
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25 | |
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26 | public UniqueListAccess(Access elementAccess, String uidName) { |
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27 | super(elementAccess); |
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28 | this.uidName = uidName; |
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29 | uidAccess = elementAccess.cloneAccess(); |
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30 | } |
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31 | |
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32 | public static Integer getUidNumber(String uid) { |
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33 | try { |
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34 | return Integer.valueOf(uid.substring(1)); |
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35 | } catch (NumberFormatException e) { |
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36 | return null; |
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37 | } |
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38 | } |
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39 | |
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40 | /** |
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41 | * @return the uidName |
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42 | */ |
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43 | public String getUidName() { |
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44 | return uidName; |
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45 | } |
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46 | |
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47 | public static class UidComparator implements Comparator<String> { |
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48 | |
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49 | protected Object description; |
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50 | |
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51 | |
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52 | /** |
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53 | * @param description |
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54 | */ |
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55 | public UidComparator(Object description) { |
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56 | this.description = description; |
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57 | } |
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58 | |
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59 | @Override |
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60 | public int compare(String a, String b) { |
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61 | if (a.equals(b)) { |
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62 | return 0; |
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63 | } |
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64 | int diff = a.length() - b.length(); |
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65 | if (diff != 0) { |
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66 | return diff; |
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67 | } |
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68 | Integer au = getUidNumber(a); |
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69 | Integer bu = getUidNumber(b); |
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70 | if (au == null || bu == null) { |
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71 | throw new FramsticksException().msg("comparator failure").arg("left", a).arg("right", b).arg("in", this); |
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72 | } |
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73 | return au - bu; |
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74 | } |
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75 | |
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76 | @Override |
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77 | public String toString() { |
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78 | return "comparator " + description; |
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79 | } |
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80 | |
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81 | |
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82 | } |
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83 | |
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84 | public static <T> Map<String, T> createMap(Class<T> type, Object description) { |
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85 | return new TreeMap<String, T>(new UidComparator(description)); |
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86 | } |
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87 | |
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88 | public static <M, T extends M> int getNumberInMap(Map<String, M> map, T object) { |
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89 | Iterator<Map.Entry<String, M>> iterator = map.entrySet().iterator(); |
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90 | int number = 0; |
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91 | while (iterator.hasNext()) { |
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92 | if (iterator.next().getValue() == object) { |
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93 | return number; |
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94 | } |
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95 | ++number; |
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96 | } |
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97 | return -1; |
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98 | } |
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99 | |
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100 | @Override |
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101 | public Map<String, Object> createAccessee() { |
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102 | return createMap(Object.class, elementAccess); |
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103 | } |
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104 | |
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105 | @Override |
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106 | public CompositeParam getParam(int i) { |
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107 | if ((i < 0) || (i >= map.size())) { |
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108 | return null; |
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109 | } |
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110 | Iterator<Map.Entry<String, Object>> iterator = map.entrySet().iterator(); |
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111 | while (i > 0 && iterator.hasNext()) { |
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112 | iterator.next(); |
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113 | --i; |
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114 | } |
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115 | if (i > 0) { |
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116 | return null; |
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117 | } |
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118 | if (!iterator.hasNext()) { |
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119 | return null; |
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120 | } |
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121 | return paramBuilder.id(iterator.next().getKey()).finish(CompositeParam.class); |
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122 | } |
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123 | |
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124 | @Override |
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125 | public CompositeParam getParam(String id) { |
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126 | Integer i = Numbers.parse(id, Integer.class); |
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127 | if (i != null) { |
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128 | return getParam(i); |
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129 | } |
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130 | Integer uidNumber = getUidNumber(id); |
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131 | if (uidNumber == null) { |
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132 | return null; |
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133 | } |
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134 | if (!map.containsKey(id)) { |
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135 | return null; |
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136 | } |
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137 | return paramBuilder.id(id).finish(CompositeParam.class); |
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138 | } |
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139 | |
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140 | |
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141 | @Override |
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142 | public String getTypeId() { |
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143 | return "l " + elementAccess.getTypeId() + " " + uidName; |
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144 | } |
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145 | |
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146 | @Override |
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147 | public int getParamCount() { |
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148 | return map.size(); |
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149 | } |
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150 | |
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151 | @Override |
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152 | public <T> T get(int i, Class<T> type) { |
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153 | Iterator<Map.Entry<String, Object>> iterator = map.entrySet().iterator(); |
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154 | while (i > 0 && iterator.hasNext()) { |
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155 | iterator.next(); |
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156 | --i; |
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157 | } |
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158 | if (i > 0) { |
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159 | return null; |
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160 | } |
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161 | if (!iterator.hasNext()) { |
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162 | return null; |
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163 | } |
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164 | return Casting.tryCast(type, iterator.next().getValue()); |
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165 | } |
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166 | |
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167 | @Override |
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168 | public <T> T get(String id, Class<T> type) { |
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169 | Integer i = Numbers.parse(id, Integer.class); |
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170 | if (i != null) { |
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171 | return get(i, type); |
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172 | } |
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173 | Integer uidNumber = getUidNumber(id); |
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174 | if (uidNumber == null) { |
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175 | return null; |
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176 | } |
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177 | return Casting.tryCast(type, map.get(id)); |
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178 | } |
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179 | |
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180 | @Override |
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181 | public <T> T get(ValueParam param, Class<T> type) { |
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182 | return get(param.getId(), type); |
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183 | } |
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184 | |
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185 | public String getUidOf(Object value) { |
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186 | return uidAccess.select(value).get(uidName, String.class); |
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187 | } |
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188 | |
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189 | public int setUidOf(Object value, String uid) { |
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190 | return uidAccess.select(value).set(uidName, uid); |
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191 | } |
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192 | |
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193 | protected int uidCounter = 1; |
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194 | |
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195 | public String generateNextUid() { |
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196 | return containedTypeName.substring(0, 1).toUpperCase() + Integer.toString(uidCounter++); |
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197 | } |
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198 | |
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199 | public String findNextFreeUid() { |
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200 | String uid; |
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201 | do { |
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202 | uid = generateNextUid(); |
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203 | } while (get(uid, Object.class) != null); |
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204 | return uid; |
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205 | } |
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206 | |
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207 | protected int setByUid(Object object, String uid) { |
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208 | if (uid == null) { |
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209 | uid = getUidOf(object); |
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210 | if (uid == null) { |
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211 | uid = findNextFreeUid(); |
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212 | setUidOf(object, uid); |
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213 | } |
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214 | } |
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215 | if (object == null) { |
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216 | map.remove(uid); |
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217 | } else { |
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218 | map.put(uid, object); |
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219 | } |
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220 | return 0; |
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221 | } |
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222 | |
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223 | @Override |
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224 | public <T> int set(int i, T value) { |
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225 | if (value != null) { |
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226 | if (i != map.size()) { |
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227 | throw new FramsticksUnsupportedOperationException().msg("setting element in unique list through index is available only for addition"); |
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228 | } |
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229 | set(getUidOf(value), value); |
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230 | return 0; |
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231 | } |
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232 | if (i >= map.size()) { |
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233 | throw new FramsticksUnsupportedOperationException().msg("invalid index for removal"); |
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234 | } |
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235 | Object current = get(i, Object.class); |
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236 | return setByUid(null, getUidOf(current)); |
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237 | } |
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238 | |
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239 | @Override |
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240 | public <T> int set(String id, T value) { |
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241 | if (id == null) { |
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242 | return setByUid(value, null); |
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243 | } |
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244 | Integer i = Numbers.parse(id, Integer.class); |
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245 | if (i != null) { |
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246 | return set(i, value); |
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247 | } |
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248 | if (value == null) { |
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249 | return setByUid(null, id); |
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250 | } |
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251 | String uid = getUidOf(value); |
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252 | if (uid != null && id != null) { |
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253 | if (!id.equals(uid)) { |
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254 | log.error("uid mismatch with set key"); |
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255 | return 0; |
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256 | } |
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257 | setByUid(value, uid); |
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258 | return 0; |
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259 | } |
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260 | if (uid != null) { |
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261 | setByUid(value, uid); |
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262 | return 0; |
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263 | } |
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264 | if (id != null) { |
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265 | setByUid(value, id); |
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266 | return 0; |
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267 | } |
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268 | log.error("missing both uid and id - failed to set"); |
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269 | return 0; |
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270 | } |
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271 | |
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272 | @Override |
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273 | public <T> int set(ValueParam param, T value) { |
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274 | return set(param.getId(), value); |
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275 | } |
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276 | |
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277 | @Override |
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278 | public void clearValues() { |
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279 | map.clear(); |
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280 | } |
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281 | |
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282 | @SuppressWarnings("unchecked") |
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283 | @Override |
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284 | public UniqueListAccess select(Object object) { |
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285 | map = ParamsUtil.selectObjectForAccess(this, object, Map.class); |
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286 | return this; |
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287 | } |
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288 | |
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289 | @Override |
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290 | public Object getSelected() { |
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291 | return map; |
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292 | } |
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293 | |
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294 | @Override |
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295 | public UniqueListAccess cloneAccess() { |
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296 | return new UniqueListAccess(elementAccess.cloneAccess(), uidName); |
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297 | } |
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298 | |
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299 | // public String computeIdentifierFor(Object selected) { |
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300 | // String uid = getUidOf(selected); |
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301 | // if (uid == null) { |
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302 | // log.error("missing uid field"); |
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303 | // return null; |
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304 | // } |
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305 | // return uid; |
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306 | // } |
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307 | |
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308 | @Override |
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309 | public Iterable<Param> getParams() { |
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310 | return new Iterable<Param>() { |
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311 | |
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312 | @Override |
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313 | public Iterator<Param> iterator() { |
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314 | return new Iterator<Param>() { |
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315 | |
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316 | protected Iterator<Map.Entry<String, Object>> internal = map.entrySet().iterator(); |
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317 | |
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318 | @Override |
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319 | public boolean hasNext() { |
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320 | return internal.hasNext(); |
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321 | } |
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322 | |
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323 | @Override |
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324 | public Param next() { |
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325 | return paramBuilder.id(internal.next().getKey()).finish(); |
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326 | } |
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327 | |
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328 | @Override |
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329 | public void remove() { |
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330 | throw new UnimplementedException().msg("remove element from list").arg("list", UniqueListAccess.this); |
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331 | |
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332 | } |
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333 | }; |
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334 | } |
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335 | }; |
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336 | } |
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337 | |
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338 | @Override |
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339 | public int getCompositeParamCount() { |
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340 | return map.size(); |
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341 | } |
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342 | |
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343 | @Override |
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344 | public CompositeParam getCompositeParam(int number) { |
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345 | return getParam(number); |
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346 | } |
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347 | |
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348 | @Override |
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349 | public ParamBuilder buildParam(ParamBuilder builder) { |
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350 | return builder.name(containedTypeName + " list").type(UniqueListParam.class).containedTypeName(containedTypeName).uid(uidName); |
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351 | } |
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352 | |
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353 | } |
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