svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.api / src / main / java / org / gvsig / expressionevaluator / spi / AbstractFunction.java @ 43983
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1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.spi; |
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2 | |||
3 | import java.util.ArrayList; |
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4 | import java.util.List; |
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5 | import java.util.Objects; |
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6 | 43939 | jjdelcerro | import org.apache.commons.lang3.BooleanUtils; |
7 | 43512 | jjdelcerro | import org.apache.commons.lang3.Range; |
8 | 43939 | jjdelcerro | import org.apache.commons.math.util.MathUtils; |
9 | import org.gvsig.expressionevaluator.Code; |
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10 | import org.gvsig.expressionevaluator.Code.Caller.Arguments; |
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11 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
12 | 43939 | jjdelcerro | import org.gvsig.expressionevaluator.Interpreter; |
13 | 43512 | jjdelcerro | import org.gvsig.fmap.geom.Geometry; |
14 | 43520 | jjdelcerro | import org.gvsig.fmap.geom.primitive.Point; |
15 | 43512 | jjdelcerro | |
16 | public abstract class AbstractFunction implements Function { |
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17 | 43521 | jjdelcerro | |
18 | 43512 | jjdelcerro | private final String name; |
19 | private final String group; |
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20 | private final Range argc; |
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21 | private final String description; |
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22 | private final String[] descriptionArgs; |
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23 | private List<String> alias; |
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24 | 43521 | jjdelcerro | private String template; |
25 | 43939 | jjdelcerro | private String returnType; |
26 | 43512 | jjdelcerro | |
27 | 43939 | jjdelcerro | protected AbstractFunction(String group, String name, Range argc, String description, String template, String[] descriptionArgs, String returnType) { |
28 | 43512 | jjdelcerro | this.name = name;
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29 | this.group = group;
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30 | this.argc = argc;
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31 | this.description = description;
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32 | 43521 | jjdelcerro | this.template = template;
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33 | 43512 | jjdelcerro | this.descriptionArgs = descriptionArgs;
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34 | 43939 | jjdelcerro | this.returnType = returnType;
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35 | 43512 | jjdelcerro | } |
36 | |||
37 | 43939 | jjdelcerro | protected AbstractFunction(String group, String name, Range argc, String description, String template, String[] descriptionArgs) { |
38 | this(group, name, argc, description, template, null, null); |
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39 | 43521 | jjdelcerro | } |
40 | |||
41 | 43939 | jjdelcerro | protected AbstractFunction(String group, String name, Range argc, String description, String template) { |
42 | this(group, name, argc, description, template, null, null); |
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43 | } |
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44 | |||
45 | 43512 | jjdelcerro | protected AbstractFunction(String group, String name, Range argc) { |
46 | 43939 | jjdelcerro | this(group, name, argc, null, null, null, null); |
47 | 43512 | jjdelcerro | } |
48 | |||
49 | @Override
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50 | public String name() { |
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51 | return this.name; |
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52 | } |
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53 | |||
54 | @Override
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55 | 43939 | jjdelcerro | public String returnType() { |
56 | return this.returnType; |
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57 | } |
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58 | |||
59 | @Override
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60 | 43512 | jjdelcerro | public String group() { |
61 | return this.group; |
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62 | } |
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63 | |||
64 | @Override
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65 | public Range argc() {
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66 | return argc;
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67 | } |
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68 | |||
69 | @Override
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70 | public String description() { |
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71 | return description;
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72 | } |
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73 | |||
74 | @Override
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75 | public String[] descriptionArgs() { |
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76 | return descriptionArgs;
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77 | } |
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78 | |||
79 | @Override
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80 | public void addAlias(String name) { |
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81 | if( this.alias == null ) { |
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82 | this.alias = new ArrayList<>(); |
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83 | } |
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84 | this.alias.add(name);
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85 | } |
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86 | |||
87 | @Override
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88 | public List<String> alias() { |
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89 | return this.alias; |
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90 | } |
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91 | |||
92 | 43521 | jjdelcerro | @Override
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93 | public String template() { |
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94 | return this.template; |
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95 | } |
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96 | |||
97 | @Override
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98 | public boolean isOperator() { |
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99 | return false; |
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100 | } |
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101 | 43939 | jjdelcerro | |
102 | @Override
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103 | public boolean useArgumentsInsteadObjects() { |
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104 | return false; |
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105 | } |
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106 | |||
107 | @Override
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108 | public Object call(Interpreter interpreter, Arguments args) throws Exception { |
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109 | return null; |
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110 | } |
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111 | 43521 | jjdelcerro | |
112 | 43512 | jjdelcerro | protected int getInt(Object args[], int n) { |
113 | if( args.length < n ) {
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114 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.length +" arguments in call to '"+name()+"'."); |
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115 | } |
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116 | if( !(args[n] instanceof Number) ) { |
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117 | String type = (args[n]==null)? "null" : args[n].getClass().getCanonicalName(); |
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118 | throw new IllegalArgumentException("Type not allowed for argument " + n + " in '" + name() + "' function, expected Number and got " + type + "."); |
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119 | } |
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120 | return ((Number)args[n]).intValue(); |
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121 | } |
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122 | |||
123 | protected long getLong(Object args[], int n) { |
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124 | if( args.length < n ) {
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125 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.length +" arguments in call to '"+name()+"'."); |
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126 | } |
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127 | if( !(args[n] instanceof Number) ) { |
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128 | String type = (args[n]==null)? "null" : args[n].getClass().getCanonicalName(); |
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129 | throw new IllegalArgumentException("Type not allowed for argument " + n + " in '" + name() + "' function, expected Number and got " + type + "."); |
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130 | } |
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131 | return ((Number)args[n]).longValue(); |
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132 | } |
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133 | |||
134 | protected double getDouble(Object args[], int n) { |
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135 | if( args.length < n ) {
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136 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.length +" arguments in call to '"+name()+"'."); |
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137 | } |
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138 | if( !(args[n] instanceof Number) ) { |
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139 | String type = (args[n]==null)? "null" : args[n].getClass().getCanonicalName(); |
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140 | throw new IllegalArgumentException("Type not allowed for argument " + n + " in '" + name() + "' function, expected Number and got " + type + "."); |
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141 | } |
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142 | return ((Number)args[n]).doubleValue(); |
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143 | } |
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144 | |||
145 | protected String getStr(Object args[], int n) { |
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146 | if( args.length < n ) {
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147 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.length +" arguments in call to '"+name()+"'."); |
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148 | } |
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149 | return Objects.toString(args[n], ""); |
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150 | } |
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151 | |||
152 | 43939 | jjdelcerro | protected Object getObject(Object args[], int n) { |
153 | if( args.length < n ) {
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154 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.length +" arguments in call to '"+name()+"'."); |
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155 | } |
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156 | return args[n];
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157 | } |
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158 | |||
159 | protected Object getObject(Interpreter interpreter, Arguments args, int n) { |
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160 | if( args.count() < n ) {
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161 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.count() +" arguments in call to '"+name()+"'."); |
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162 | } |
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163 | Code arg = args.get(n); |
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164 | Object value = interpreter.run(arg);
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165 | return value;
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166 | } |
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167 | |||
168 | 43512 | jjdelcerro | protected Geometry getGeom(Object[] args, int n) { |
169 | if( args.length < n ) {
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170 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.length +" arguments in call to '"+name()+"'."); |
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171 | } |
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172 | if( !(args[n] instanceof Geometry) ) { |
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173 | String type = (args[n]==null)? "null" : args[n].getClass().getCanonicalName(); |
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174 | throw new IllegalArgumentException("Type not allowed for argument " + n + " in '" + name() + "' function, expected Geometry and got " + type + "."); |
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175 | } |
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176 | return (Geometry)args[n];
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177 | } |
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178 | 43520 | jjdelcerro | |
179 | protected Point getPoint(Object[] args, int n) { |
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180 | if( args.length < n ) {
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181 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.length +" arguments in call to '"+name()+"'."); |
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182 | } |
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183 | if( !(args[n] instanceof Point) ) { |
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184 | String type = (args[n]==null)? "null" : args[n].getClass().getCanonicalName(); |
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185 | throw new IllegalArgumentException("Type not allowed for argument " + n + " in '" + name() + "' function, expected Point and got " + type + "."); |
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186 | } |
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187 | return (Point)args[n]; |
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188 | } |
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189 | 43939 | jjdelcerro | |
190 | protected boolean getBoolean(Object args[], int n, Double accuracy) { |
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191 | if( args.length < n ) {
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192 | throw new IllegalArgumentException("Required argument "+n+" and only found " + args.length +" arguments in call to '"+name()+"'."); |
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193 | } |
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194 | Object value = args[n];
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195 | return toBoolean(value, accuracy);
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196 | } |
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197 | |||
198 | protected boolean getBoolean(Interpreter interpreter, Arguments args, int n) { |
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199 | Object value = getObject(interpreter, args, n);
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200 | return toBoolean(value, interpreter.getAccuracy());
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201 | } |
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202 | |||
203 | protected boolean toBoolean(Object value, Double accuracy) { |
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204 | if( value == null ) { |
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205 | return false; |
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206 | } |
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207 | if( value instanceof Boolean ) { |
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208 | return (Boolean)value; |
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209 | } |
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210 | if( value instanceof Number ) { |
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211 | return MathUtils.compareTo(
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212 | ((Number) value).doubleValue(),
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213 | 0,
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214 | accuracy==null? MathUtils.EPSILON:accuracy
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215 | ) == 0;
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216 | } |
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217 | return BooleanUtils.toBoolean(value.toString());
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218 | } |
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219 | 43512 | jjdelcerro | } |