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.HashMap; |
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5 | import java.util.List; |
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6 | import java.util.Map; |
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7 | import java.util.TreeMap; |
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8 | import java.util.regex.Matcher; |
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9 | import java.util.regex.Pattern; |
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10 | |
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11 | import javax.annotation.Nonnull; |
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12 | |
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13 | // import org.apache.logging.log4j.Logger; |
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14 | // import org.apache.logging.log4j.LogManager; |
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15 | |
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16 | import com.framsticks.util.FramsticksException; |
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17 | import com.framsticks.util.lang.Numbers; |
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18 | |
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19 | |
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20 | import static com.framsticks.util.lang.Containers.filterInstanceof; |
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21 | |
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22 | /** |
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23 | * @author Piotr Sniegowski |
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24 | */ |
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25 | public abstract class ParamsUtil { |
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26 | // private final static Logger log = LogManager.getLogger(ParamsUtil.class.getName()); |
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27 | |
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28 | |
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29 | public static String readSourceToString(Source source) { |
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30 | StringBuilder result = new StringBuilder(); |
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31 | String line; |
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32 | while ((line = source.readLine()) != null) { |
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33 | result.append(line).append(" "); |
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34 | } |
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35 | source.close(); |
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36 | return result.toString(); |
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37 | } |
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38 | |
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39 | public static <T> List<T> stripAccess(List<Access> accesses, Class<T> type) { |
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40 | List<T> result = new ArrayList<T>(); |
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41 | for (Access a : accesses) { |
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42 | Object object = a.getSelected(); |
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43 | if (!type.isInstance(object)) { |
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44 | 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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45 | } |
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46 | result.add(type.cast(object)); |
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47 | } |
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48 | return result; |
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49 | } |
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50 | |
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51 | public static int takeAllNonNullValues(Access to, Access from) { |
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52 | int copied = 0; |
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53 | for (ValueParam f : filterInstanceof(from.getParams(), ValueParam.class)) { |
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54 | Object v = from.get(f, Object.class); |
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55 | if (v == null) { |
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56 | continue; |
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57 | } |
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58 | // if (to.get(f, Object.class) != null) { |
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59 | // continue; |
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60 | // } |
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61 | to.set(f, v); |
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62 | ++copied; |
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63 | } |
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64 | return copied; |
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65 | } |
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66 | |
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67 | public static int copyExistingParamsTypeSafe(Access to, Access from) { |
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68 | int copied = 0; |
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69 | for (ValueParam f : filterInstanceof(from.getParams(), ValueParam.class)) { |
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70 | Param t = from.getParam(f.getId()); |
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71 | if (!(t instanceof ValueParam)) { |
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72 | continue; |
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73 | } |
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74 | if (to.getClass() != f.getClass()) { |
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75 | continue; |
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76 | } |
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77 | to.set((ValueParam) t, from.get(f, Object.class)); |
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78 | ++copied; |
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79 | } |
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80 | return copied; |
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81 | } |
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82 | |
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83 | public static <T> T selectObjectForAccess(Access access, Object object, Class<T> type) { |
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84 | if (object == null) { |
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85 | return null; |
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86 | } |
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87 | if (!type.isInstance(object)) { |
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88 | 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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89 | } |
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90 | return type.cast(object); |
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91 | } |
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92 | |
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93 | public static int getNumberOfCompositeParamChild(Access access, Object child) { |
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94 | int count = access.getCompositeParamCount(); |
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95 | for (int i = 0; i < count; ++i) { |
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96 | if (access.get(i, Object.class) == child) { |
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97 | return i; |
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98 | } |
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99 | } |
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100 | return -1; |
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101 | } |
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102 | |
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103 | public static Object[] arguments(Object... args) { |
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104 | return args; |
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105 | } |
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106 | |
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107 | public static Param getParam(ParamCollection collection, int i) { |
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108 | return collection.getParam(i); |
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109 | } |
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110 | |
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111 | public static Param getParam(ParamCollection collection, String id) { |
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112 | return collection.getParam(id); |
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113 | } |
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114 | |
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115 | 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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116 | if (param == null) { |
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117 | // return null; |
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118 | throw new FramsticksException().msg("param is missing").arg("name", name).arg("in", collection); |
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119 | } |
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120 | if (!type.isInstance(param)) { |
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121 | // return null; |
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122 | throw new FramsticksException().msg("wrong type of param").arg("actual", param.getClass()).arg("requested", type).arg("in", collection); |
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123 | } |
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124 | return type.cast(param); |
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125 | } |
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126 | |
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127 | /** |
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128 | * Gets the param entry. |
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129 | * |
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130 | * @param i |
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131 | * the offset of parameter |
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132 | * @return the param entry |
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133 | */ |
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134 | public static @Nonnull <T extends Param> T getParam(ParamCollection collection, final int i, @Nonnull final Class<T> type) { |
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135 | return castedParam(collection, collection.getParam(i), type, i); |
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136 | } |
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137 | |
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138 | /** |
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139 | * Gets the param entry. |
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140 | * |
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141 | * @param id |
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142 | * the getId of parameter |
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143 | * @return the param entry |
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144 | */ |
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145 | public static @Nonnull <T extends Param> T getParam(ParamCollection collection, @Nonnull final String id, @Nonnull final Class<T> type) { |
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146 | return castedParam(collection, collection.getParam(id), type, id); |
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147 | } |
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148 | |
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149 | public static final String SERIALIZED = "@Serialized:"; |
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150 | |
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151 | public static class SerializationContext { |
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152 | protected final StringBuilder builder = new StringBuilder(); |
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153 | protected final ArrayList<Object> objects = new ArrayList<>(); |
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154 | |
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155 | protected void appendString(String value) { |
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156 | builder.append('"').append(value).append('"'); |
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157 | } |
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158 | |
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159 | protected boolean serializeInternal(Object value) { |
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160 | if (value == null) { |
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161 | builder.append("null"); |
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162 | return true; |
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163 | } |
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164 | /** indexOf is not used here, because it uses equals() internally, which results in StackOverflowError */ |
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165 | Class<?> type = value.getClass(); |
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166 | if (type.equals(String.class)) { |
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167 | String stringValue = (String) value; |
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168 | appendString(stringValue); |
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169 | return stringValue.startsWith(SERIALIZED); |
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170 | } |
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171 | if (type.equals(Boolean.class)) { |
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172 | builder.append(((Boolean) value) ? "1" : "0"); |
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173 | return false; |
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174 | } |
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175 | if (type.equals(Double.class) || type.equals(Integer.class)) { |
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176 | builder.append(value.toString()); |
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177 | return false; |
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178 | } |
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179 | |
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180 | for (int i = 0; i < objects.size(); ++i) { |
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181 | if (objects.get(i) == value) { |
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182 | builder.append("^").append(i); |
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183 | return true; |
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184 | } |
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185 | } |
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186 | |
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187 | if (List.class.isAssignableFrom(type)) { |
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188 | objects.add(value); |
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189 | List<?> list = (List<?>) value; |
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190 | boolean placeComma = false; |
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191 | builder.append("["); |
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192 | for (Object element : list) { |
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193 | if (placeComma) { |
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194 | builder.append(","); |
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195 | } else { |
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196 | placeComma = true; |
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197 | } |
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198 | serializeInternal(element); |
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199 | } |
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200 | builder.append("]"); |
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201 | return true; |
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202 | } |
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203 | if (Map.class.isAssignableFrom(type)) { |
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204 | objects.add(value); |
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205 | Map<?, ?> map = (Map<?, ?>) value; |
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206 | boolean placeComma = false; |
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207 | builder.append("{"); |
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208 | for (Map.Entry<?, ?> entry : map.entrySet()) { |
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209 | if (placeComma) { |
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210 | builder.append(","); |
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211 | } else { |
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212 | placeComma = true; |
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213 | } |
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214 | if (!(entry.getKey() instanceof String)) { |
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215 | throw new FramsticksException().msg("non string keys are not allowed in serialization").arg("key type", entry.getKey().getClass()); |
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216 | } |
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217 | appendString((String) entry.getKey()); |
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218 | builder.append(":"); |
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219 | serializeInternal(entry.getValue()); |
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220 | } |
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221 | builder.append("}"); |
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222 | return true; |
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223 | } |
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224 | if (type.equals(OpaqueObject.class)) { |
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225 | builder.append(value.toString()); |
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226 | return true; |
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227 | } |
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228 | throw new FramsticksException().msg("invalid type for serialization").arg("type", type); |
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229 | } |
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230 | |
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231 | public String serialize(Object value) { |
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232 | if (value instanceof String) { |
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233 | String stringValue = (String) value; |
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234 | if (!stringValue.startsWith(SERIALIZED)) { |
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235 | return stringValue; |
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236 | } |
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237 | } |
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238 | boolean complex = serializeInternal(value); |
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239 | return (complex ? SERIALIZED : "") + builder.toString(); |
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240 | } |
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241 | |
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242 | } |
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243 | |
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244 | |
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245 | public static <T> String serialize(T value) { |
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246 | return new SerializationContext().serialize(value); |
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247 | } |
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248 | |
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249 | public static class DeserializationContext { |
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250 | |
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251 | public static final Pattern OPAQUE_OBJECT_PATTERN = Pattern.compile("^(\\w+)<0x([a-fA-F0-9]+)>$"); |
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252 | |
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253 | @SuppressWarnings("serial") |
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254 | public static class Exception extends FramsticksException { |
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255 | } |
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256 | |
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257 | protected final ArrayList<Object> objects = new ArrayList<>(); |
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258 | protected int cursor = 0; |
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259 | protected final String input; |
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260 | |
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261 | /** |
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262 | * @param input |
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263 | */ |
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264 | public DeserializationContext(String input) { |
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265 | this.input = input; |
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266 | cursor = 0; |
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267 | } |
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268 | |
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269 | protected boolean isFinished() { |
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270 | return cursor == input.length(); |
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271 | } |
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272 | |
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273 | protected boolean is(char value) { |
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274 | if (isFinished()) { |
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275 | throw fail().msg("input ended"); |
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276 | } |
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277 | return input.charAt(cursor) == value; |
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278 | } |
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279 | |
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280 | protected boolean isOneOf(String values) { |
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281 | if (isFinished()) { |
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282 | throw fail().msg("input ended"); |
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283 | } |
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284 | return values.indexOf(input.charAt(cursor)) != -1; |
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285 | } |
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286 | |
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287 | protected char at() { |
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288 | return input.charAt(cursor); |
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289 | } |
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290 | |
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291 | protected char at(int pos) { |
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292 | return input.charAt(pos); |
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293 | } |
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294 | |
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295 | protected FramsticksException fail() { |
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296 | return new Exception().arg("at", cursor).arg("input", input); |
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297 | } |
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298 | |
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299 | protected void force(char value) { |
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300 | if (!is(value)) { |
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301 | throw fail().msg("invalid character").arg("expected", value).arg("found", at()); |
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302 | } |
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303 | next(); |
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304 | } |
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305 | |
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306 | protected boolean isAndNext(char value) { |
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307 | if (!is(value)) { |
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308 | return false; |
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309 | } |
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310 | next(); |
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311 | return true; |
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312 | } |
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313 | |
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314 | protected void next() { |
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315 | ++cursor; |
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316 | // log.info("at: {}|{}", input.substring(0, cursor), input.substring(cursor)); |
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317 | } |
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318 | |
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319 | protected void goToNext(char value) { |
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320 | while (cursor < input.length()) { |
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321 | if (is(value)) { |
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322 | return; |
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323 | } |
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324 | next(); |
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325 | } |
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326 | throw fail().msg("passed end").arg("searching", value); |
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327 | } |
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328 | |
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329 | |
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330 | protected String forceStringRemaining() { |
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331 | int start = cursor; |
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332 | while (true) { |
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333 | goToNext('"'); |
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334 | if (at(cursor - 1) != '\\') { |
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335 | next(); |
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336 | return input.substring(start, cursor - 1); |
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337 | } |
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338 | next(); |
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339 | // it is finishing that loop, because of throwing in goToNext() |
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340 | } |
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341 | // throw fail(); |
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342 | } |
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343 | |
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344 | public Object deserialize() { |
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345 | if (isAndNext('[')) { |
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346 | List<Object> list = new ArrayList<>(); |
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347 | objects.add(list); |
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348 | while (!isAndNext(']')) { |
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349 | if (!list.isEmpty()) { |
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350 | force(','); |
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351 | } |
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352 | Object child = deserialize(); |
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353 | list.add(child); |
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354 | } |
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355 | return list; |
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356 | } |
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357 | |
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358 | if (isAndNext('{')) { |
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359 | Map<String, Object> map = new TreeMap<>(); |
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360 | objects.add(map); |
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361 | while (!isAndNext('}')) { |
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362 | if (!map.isEmpty()) { |
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363 | force(','); |
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364 | } |
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365 | force('"'); |
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366 | String key = forceStringRemaining(); |
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367 | force(':'); |
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368 | Object value = deserialize(); |
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369 | map.put(key, value); |
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370 | } |
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371 | return map; |
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372 | } |
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373 | |
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374 | if (isAndNext('"')) { |
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375 | return forceStringRemaining(); |
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376 | } |
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377 | int start = cursor; |
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378 | while (!isFinished() && !isOneOf("]},")) { |
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379 | next(); |
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380 | } |
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381 | if (start == cursor) { |
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382 | throw fail().msg("empty value"); |
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383 | } |
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384 | |
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385 | String value = input.substring(start, cursor); |
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386 | if (value.equals("null")) { |
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387 | //TODO: add this to list? |
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388 | return null; |
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389 | } |
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390 | |
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391 | Matcher matcher = OPAQUE_OBJECT_PATTERN.matcher(value); |
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392 | if (matcher.matches()) { |
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393 | return new OpaqueObject(matcher.group(1), Long.parseLong(matcher.group(2), 16)); |
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394 | } |
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395 | |
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396 | |
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397 | Object number = DeserializationContext.tryParseNumber(value); |
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398 | if (number != null) { |
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399 | return number; |
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400 | } |
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401 | |
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402 | if (value.charAt(0) == '^') { |
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403 | Integer reference = Numbers.parse(value.substring(1), Integer.class); |
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404 | if (reference == null) { |
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405 | throw fail().msg("invalid reference").arg("reference", reference); |
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406 | } |
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407 | return objects.get(reference); |
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408 | } |
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409 | //TODO: parse ^ |
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410 | //TODO: parse opaque object |
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411 | throw fail().msg("unknown entity"); |
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412 | |
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413 | } |
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414 | |
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415 | public static Object tryParseNumber(String value) { |
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416 | Integer i = Numbers.parse(value, Integer.class); |
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417 | if (i != null) { |
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418 | return i; |
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419 | } |
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420 | |
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421 | Double d = Numbers.parse(value, Double.class); |
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422 | if (d != null) { |
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423 | return d; |
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424 | } |
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425 | |
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426 | return null; |
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427 | } |
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428 | } |
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429 | |
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430 | |
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431 | public static Object deserialize(String value) { |
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432 | Object number = DeserializationContext.tryParseNumber(value); |
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433 | if (number != null) { |
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434 | return number; |
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435 | } |
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436 | |
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437 | if (!value.startsWith(SERIALIZED)) { |
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438 | return value; |
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439 | } |
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440 | return new DeserializationContext(value.substring(SERIALIZED.length())).deserialize(); |
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441 | } |
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442 | |
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443 | public static <T> T deserialize(String value, Class<T> type) { |
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444 | Object object = deserialize(value); |
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445 | |
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446 | return type.cast(object); |
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447 | } |
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448 | |
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449 | } |
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