1 | package com.framsticks.params; |
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2 | |
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3 | import java.util.ArrayList; |
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4 | import java.util.List; |
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5 | import java.util.Map; |
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6 | |
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7 | import javax.annotation.Nonnull; |
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8 | |
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9 | import com.framsticks.util.FramsticksException; |
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10 | |
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11 | |
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12 | import static com.framsticks.util.lang.Containers.filterInstanceof; |
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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 abstract class ParamsUtil { |
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18 | |
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19 | public static String readSourceToString(Source source) { |
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20 | StringBuilder result = new StringBuilder(); |
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21 | String line; |
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22 | while ((line = source.readLine()) != null) { |
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23 | result.append(line).append(" "); |
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24 | } |
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25 | source.close(); |
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26 | return result.toString(); |
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27 | } |
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28 | |
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29 | public static <T> List<T> stripAccess(List<Access> accesses, Class<T> type) { |
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30 | List<T> result = new ArrayList<T>(); |
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31 | for (Access a : accesses) { |
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32 | Object object = a.getSelected(); |
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33 | if (!type.isInstance(object)) { |
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34 | throw new FramsticksException().msg("extracted object is of invalid type").arg("object", object).arg("desired", type).arg("actual", object.getClass()).arg("access", a); |
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35 | } |
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36 | result.add(type.cast(object)); |
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37 | } |
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38 | return result; |
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39 | } |
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40 | |
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41 | public static int takeAllNonNullValues(Access to, Access from) { |
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42 | int copied = 0; |
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43 | for (ValueParam f : filterInstanceof(from.getParams(), ValueParam.class)) { |
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44 | Object v = from.get(f, Object.class); |
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45 | if (v == null) { |
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46 | continue; |
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47 | } |
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48 | // if (to.get(f, Object.class) != null) { |
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49 | // continue; |
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50 | // } |
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51 | to.set(f, v); |
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52 | ++copied; |
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53 | } |
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54 | return copied; |
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55 | } |
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56 | |
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57 | public static int copyExistingParamsTypeSafe(Access to, Access from) { |
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58 | int copied = 0; |
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59 | for (ValueParam f : filterInstanceof(from.getParams(), ValueParam.class)) { |
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60 | Param t = from.getParam(f.getId()); |
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61 | if (!(t instanceof ValueParam)) { |
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62 | continue; |
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63 | } |
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64 | if (to.getClass() != f.getClass()) { |
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65 | continue; |
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66 | } |
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67 | to.set((ValueParam) t, from.get(f, Object.class)); |
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68 | ++copied; |
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69 | } |
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70 | return copied; |
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71 | } |
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72 | |
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73 | public static <T> T selectObjectForAccess(Access access, Object object, Class<T> type) { |
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74 | if (object == null) { |
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75 | return null; |
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76 | } |
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77 | if (!type.isInstance(object)) { |
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78 | throw new FramsticksException().msg("trying to select object of wrong type").arg("object", object).arg("type", object.getClass()).arg("in", access); |
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79 | } |
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80 | return type.cast(object); |
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81 | } |
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82 | |
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83 | public static int getNumberOfCompositeParamChild(Access access, Object child) { |
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84 | int count = access.getCompositeParamCount(); |
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85 | for (int i = 0; i < count; ++i) { |
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86 | if (access.get(i, Object.class) == child) { |
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87 | return i; |
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88 | } |
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89 | } |
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90 | return -1; |
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91 | } |
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92 | |
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93 | public static Object[] arguments(Object... args) { |
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94 | return args; |
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95 | } |
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96 | |
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97 | public static Param getParam(ParamCollection collection, int i) { |
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98 | return collection.getParam(i); |
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99 | } |
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100 | |
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101 | public static Param getParam(ParamCollection collection, String id) { |
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102 | return collection.getParam(id); |
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103 | } |
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104 | |
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105 | public static @Nonnull <T extends Param> T castedParam(ParamCollection collection, @Nonnull final Param param, @Nonnull final Class<T> type, Object name) { |
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106 | if (param == null) { |
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107 | // return null; |
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108 | throw new FramsticksException().msg("param is missing").arg("name", name).arg("in", collection); |
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109 | } |
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110 | if (!type.isInstance(param)) { |
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111 | // return null; |
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112 | throw new FramsticksException().msg("wrong type of param").arg("actual", param.getClass()).arg("requested", type).arg("in", collection); |
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113 | } |
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114 | return type.cast(param); |
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115 | } |
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116 | |
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117 | /** |
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118 | * Gets the param entry. |
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119 | * |
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120 | * @param i |
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121 | * the offset of parameter |
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122 | * @return the param entry |
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123 | */ |
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124 | public static @Nonnull <T extends Param> T getParam(ParamCollection collection, final int i, @Nonnull final Class<T> type) { |
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125 | return castedParam(collection, collection.getParam(i), type, i); |
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126 | } |
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127 | |
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128 | /** |
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129 | * Gets the param entry. |
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130 | * |
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131 | * @param id |
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132 | * the getId of parameter |
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133 | * @return the param entry |
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134 | */ |
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135 | public static @Nonnull <T extends Param> T getParam(ParamCollection collection, @Nonnull final String id, @Nonnull final Class<T> type) { |
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136 | return castedParam(collection, collection.getParam(id), type, id); |
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137 | } |
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138 | |
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139 | public static final String SERIALIZED = "@Serialized:"; |
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140 | |
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141 | public static class SerializationContext { |
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142 | protected final StringBuilder builder = new StringBuilder(); |
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143 | protected final ArrayList<Object> objects = new ArrayList<>(); |
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144 | |
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145 | protected void appendString(String value) { |
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146 | builder.append('"').append(value).append('"'); |
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147 | } |
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148 | |
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149 | protected boolean serializeInternal(Object value) { |
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150 | if (value == null) { |
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151 | builder.append("null"); |
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152 | return true; |
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153 | } |
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154 | /** indexOf is not used here, because it uses equals() internally, which results in StackOverflowError */ |
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155 | Class<?> type = value.getClass(); |
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156 | if (type.equals(String.class)) { |
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157 | String stringValue = (String) value; |
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158 | appendString(stringValue); |
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159 | return stringValue.startsWith(SERIALIZED); |
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160 | } |
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161 | if (type.equals(Boolean.class)) { |
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162 | builder.append(((Boolean) value) ? "1" : "0"); |
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163 | return false; |
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164 | } |
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165 | if (type.equals(Double.class) || type.equals(Integer.class)) { |
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166 | builder.append(value.toString()); |
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167 | return false; |
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168 | } |
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169 | |
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170 | for (int i = 0; i < objects.size(); ++i) { |
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171 | if (objects.get(i) == value) { |
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172 | builder.append("^").append(i); |
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173 | return true; |
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174 | } |
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175 | } |
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176 | |
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177 | if (List.class.isAssignableFrom(type)) { |
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178 | objects.add(value); |
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179 | List<?> list = (List<?>) value; |
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180 | boolean placeComma = false; |
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181 | builder.append("["); |
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182 | for (Object element : list) { |
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183 | if (placeComma) { |
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184 | builder.append(","); |
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185 | } else { |
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186 | placeComma = true; |
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187 | } |
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188 | serializeInternal(element); |
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189 | } |
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190 | builder.append("]"); |
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191 | return true; |
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192 | } |
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193 | if (Map.class.isAssignableFrom(type)) { |
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194 | objects.add(value); |
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195 | Map<?, ?> map = (Map<?, ?>) value; |
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196 | boolean placeComma = false; |
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197 | builder.append("{"); |
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198 | for (Map.Entry<?, ?> entry : map.entrySet()) { |
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199 | if (placeComma) { |
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200 | builder.append(","); |
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201 | } else { |
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202 | placeComma = true; |
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203 | } |
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204 | if (!(entry.getKey() instanceof String)) { |
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205 | throw new FramsticksException().msg("non string keys are not allowed in serialization").arg("key type", entry.getKey().getClass()); |
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206 | } |
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207 | appendString((String) entry.getKey()); |
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208 | builder.append(":"); |
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209 | serializeInternal(entry.getValue()); |
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210 | } |
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211 | builder.append("}"); |
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212 | return true; |
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213 | } |
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214 | throw new FramsticksException().msg("invalid type for serialization").arg("type", type); |
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215 | } |
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216 | |
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217 | public String serialize(Object value) { |
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218 | if (value instanceof String) { |
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219 | String stringValue = (String) value; |
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220 | if (!stringValue.startsWith(SERIALIZED)) { |
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221 | return stringValue; |
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222 | } |
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223 | } |
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224 | boolean complex = serializeInternal(value); |
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225 | return (complex ? SERIALIZED : "") + builder.toString(); |
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226 | } |
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227 | |
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228 | } |
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229 | |
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230 | |
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231 | public static <T> String serialize(T value) { |
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232 | return new SerializationContext().serialize(value); |
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233 | } |
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234 | |
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235 | public static <T> T deserialize(String value, Class<T> type) { |
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236 | return null; |
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237 | } |
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238 | |
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239 | } |
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