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annotate src/luan/modules/Utils.java @ 1802:ca98dee04e08 default tip

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add Parsers.json_null
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 21 Apr 2024 21:25:15 -0600
parents 0ba144491a42
children
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rev   line source
167
4c0131c2b650 merge luan/lib into modules
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diff changeset
1 package luan.modules;
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2
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3 import java.io.Reader;
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4 import java.io.IOException;
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5 import java.io.ByteArrayOutputStream;
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6 import java.io.InputStream;
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7 import java.io.OutputStream;
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8 import java.io.File;
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9 import java.io.InputStreamReader;
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10 import java.net.URL;
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11 import java.net.MalformedURLException;
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12 import java.util.Map;
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13 import goodjava.io.IoUtils;
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14 import luan.Luan;
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15 import luan.LuanException;
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16 import luan.LuanTable;
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17 import luan.LuanFunction;
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18
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19
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20 public final class Utils {
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21 private Utils() {} // never
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22
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23 static final int bufSize = 8192;
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24
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25 private static void checkNotNull(Object v,String expected,int pos) throws LuanException {
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26 if( v == null )
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27 throw new LuanException("bad argument #"+pos+" ("+expected+" expected, got nil)");
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28 }
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29
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30 public static void checkNotNull(String s,int pos) throws LuanException {
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31 checkNotNull(s,"string",pos);
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32 }
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33
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34 public static void checkNotNull(String s) throws LuanException {
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35 checkNotNull(s,1);
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36 }
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37
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38 public static void checkNotNull(byte[] b,int pos) throws LuanException {
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39 checkNotNull(b,"binary",pos);
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40 }
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41
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42 public static void checkNotNull(byte[] b) throws LuanException {
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43 checkNotNull(b,1);
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44 }
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45
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46 public static void checkNotNull(LuanTable t,int pos) throws LuanException {
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47 checkNotNull(t,"table",pos);
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48 }
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49
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50 public static void checkNotNull(LuanTable t) throws LuanException {
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51 checkNotNull(t,1);
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52 }
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53
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54 public static void checkNotNull(Number n,int pos) throws LuanException {
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55 checkNotNull(n,"number",pos);
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56 }
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57
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58 public static void checkNotNull(Number n) throws LuanException {
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59 checkNotNull(n,1);
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60 }
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61
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62 public static void checkNotNull(LuanFunction fn,int pos) throws LuanException {
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63 checkNotNull(fn,"function",pos);
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64 }
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65
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66 public static void checkNotNull(LuanFunction fn) throws LuanException {
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67 checkNotNull(fn,1);
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68 }
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69
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70 public static byte[] readAll(InputStream in)
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71 throws IOException
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72 {
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73 ByteArrayOutputStream out = new ByteArrayOutputStream();
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74 IoUtils.copyAll(in,out);
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75 return out.toByteArray();
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76 }
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78
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79 public static String removeString(LuanTable options,String key) throws LuanException {
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80 Object val = options.remove(key);
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81 if( val!=null && !(val instanceof String) )
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82 throw new LuanException( "parameter '"+key+"' must be a string but is a "+Luan.type(val) );
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83 return (String)val;
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84 }
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85
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86 public static String removeRequiredString(LuanTable options,String key) throws LuanException {
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87 String s = removeString(options,key);
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88 if( s==null )
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89 throw new LuanException( "parameter '"+key+"' is required" );
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90 return s;
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91 }
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92
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93 public static Number removeNumber(LuanTable options,String key) throws LuanException {
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94 Object val = options.remove(key);
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95 if( val!=null && !(val instanceof Number) )
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96 throw new LuanException( "parameter '"+key+"' must be a string but is a "+Luan.type(val) );
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97 return (Number)val;
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98 }
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99
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100 public static Integer removeInteger(LuanTable options,String key) throws LuanException {
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101 Object val = options.remove(key);
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102 if( val==null )
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103 return null;
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104 Integer i = Luan.asInteger(val);
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105 if( i==null ) {
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106 String type = val instanceof Number ? val.getClass().getSimpleName().toLowerCase() : Luan.type(val);
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107 throw new LuanException( "parameter '"+key+"' must be an integer but is a "+type );
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108 }
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109 return i;
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110 }
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111
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112 public static LuanTable removeTable(LuanTable options,String key) throws LuanException {
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113 Object val = options.remove(key);
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114 if( val!=null && !(val instanceof LuanTable) )
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115 throw new LuanException( "parameter '"+key+"' must be a table but is a "+Luan.type(val) );
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116 return (LuanTable)val;
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117 }
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118
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119 public static Boolean removeBoolean(LuanTable options,String key) throws LuanException {
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120 Object val = options.remove(key);
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121 if( val!=null && !(val instanceof Boolean) )
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122 throw new LuanException( "parameter '"+key+"' must be a string but is a "+Luan.type(val) );
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123 return (Boolean)val;
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124 }
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125
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126 public static LuanFunction removeFunction(LuanTable options,String key) throws LuanException {
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127 Object val = options.remove(key);
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128 if( val!=null && !(val instanceof LuanFunction) )
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129 throw new LuanException( "parameter '"+key+"' must be a function but is a "+Luan.type(val) );
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130 return (LuanFunction)val;
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131 }
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132
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133 public static LuanFunction removeRequiredFunction(LuanTable options,String key) throws LuanException {
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134 LuanFunction fn = removeFunction(options,key);
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135 if( fn==null )
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136 throw new LuanException( "parameter '"+key+"' is required" );
002152af497a hosted postgres
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parents: 1389
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137 return fn;
002152af497a hosted postgres
Franklin Schmidt <fschmidt@gmail.com>
parents: 1389
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138 }
002152af497a hosted postgres
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139
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140 public static void checkEmpty(LuanTable options) throws LuanException {
225808b90cee options handling
Franklin Schmidt <fschmidt@gmail.com>
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141 if( !options.isEmpty() )
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142 throw new LuanException( "unrecognized options: "+options.asMap() );
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143 }
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144
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aa7538ae5fb6 can now load modules from classpath
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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145 }