Mercurial Hosting > luan
annotate src/luan/modules/TableLuan.java @ 1333:25746915a241
merge Luan and LuanState
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 12 Feb 2019 22:33:40 -0700 |
parents | f41919741100 |
children | c88b486a9511 |
rev | line source |
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1 package luan.modules; |
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2 |
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3 import java.util.Comparator; |
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4 import java.util.List; |
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5 import java.util.ArrayList; |
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6 import java.util.Arrays; |
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7 import luan.Luan; |
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8 import luan.LuanTable; |
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9 import luan.LuanFunction; |
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10 import luan.LuanException; |
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11 import luan.LuanRuntimeException; |
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12 import luan.LuanMethod; |
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13 |
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14 |
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15 public final class TableLuan { |
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16 |
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17 public static String concat(Luan luan,LuanTable list,String sep,Integer i,Integer j) throws LuanException { |
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18 int first = i==null ? 1 : i; |
1267 | 19 int last = j==null ? list.length() : j; |
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20 StringBuilder buf = new StringBuilder(); |
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21 for( int k=first; k<=last; k++ ) { |
1267 | 22 Object val = list.get(k); |
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23 if( val==null ) |
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24 break; |
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25 if( sep!=null && k > first ) |
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26 buf.append(sep); |
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27 String s = luan.toString(val); |
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28 buf.append(s); |
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29 } |
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30 return buf.toString(); |
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31 } |
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32 |
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33 public static void insert(LuanTable list,int pos,Object value) throws LuanException { |
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34 Utils.checkNotNull(list); |
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35 if( list.getMetatable() != null ) |
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36 throw new LuanException("can't insert into a table with a metatable"); |
431 | 37 list.rawInsert(pos,value); |
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38 } |
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39 |
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40 public static Object remove(LuanTable list,int pos) throws LuanException { |
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41 if( list.getMetatable() != null ) |
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42 throw new LuanException("can't remove from a table with a metatable"); |
431 | 43 return list.rawRemove(pos); |
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44 } |
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45 |
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46 private static interface LessThan { |
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47 public boolean isLessThan(Object o1,Object o2); |
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48 } |
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49 |
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50 public static void sort(final Luan luan,LuanTable list,final LuanFunction comp) throws LuanException { |
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51 if( list.getMetatable() != null ) |
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52 throw new LuanException("can't sort a table with a metatable"); |
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53 final LessThan lt; |
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54 if( comp==null ) { |
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55 lt = new LessThan() { |
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56 public boolean isLessThan(Object o1,Object o2) { |
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57 try { |
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58 return luan.isLessThan(o1,o2); |
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59 } catch(LuanException e) { |
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60 throw new LuanRuntimeException(e); |
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61 } |
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62 } |
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63 }; |
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64 } else { |
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65 lt = new LessThan() { |
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66 public boolean isLessThan(Object o1,Object o2) { |
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67 try { |
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68 return Luan.checkBoolean(Luan.first(comp.call(luan,new Object[]{o1,o2}))); |
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69 } catch(LuanException e) { |
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70 throw new LuanRuntimeException(e); |
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71 } |
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72 } |
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73 }; |
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74 } |
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75 try { |
431 | 76 list.rawSort( new Comparator<Object>() { |
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77 public int compare(Object o1,Object o2) { |
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78 return lt.isLessThan(o1,o2) ? -1 : lt.isLessThan(o2,o1) ? 1 : 0; |
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79 } |
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80 } ); |
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81 } catch(LuanRuntimeException e) { |
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82 throw (LuanException)e.getCause(); |
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83 } |
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84 } |
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85 |
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86 public static LuanTable pack(Luan luan,Object... args) throws LuanException { |
1267 | 87 LuanTable tbl = new LuanTable(luan,Arrays.asList(args)); |
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88 tbl.rawPut( "n", args.length ); |
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89 return tbl; |
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90 } |
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91 |
1267 | 92 @LuanMethod public static Object[] unpack(LuanTable tbl,Integer iFrom,Integer iTo) throws LuanException { |
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93 int from = iFrom!=null ? iFrom : 1; |
1277 | 94 int to; |
95 if( iTo != null ) { | |
96 to = iTo; | |
97 } else { | |
98 Integer n = Luan.asInteger( tbl.get("n") ); | |
99 to = n!=null ? n : tbl.length(); | |
100 } | |
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101 List<Object> list = new ArrayList<Object>(); |
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102 for( int i=from; i<=to; i++ ) { |
1267 | 103 list.add( tbl.get(i) ); |
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104 } |
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105 return list.toArray(); |
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106 } |
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107 |
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108 public static LuanTable copy(Luan luan,LuanTable list,Integer from,Integer to) { |
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109 if( from == null ) |
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110 return new LuanTable(list); |
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111 if( to == null ) |
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112 to = list.rawLength(); |
431 | 113 return list.rawSubList(from,to); |
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114 } |
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115 |
580 | 116 public static void clear(LuanTable tbl) { |
117 tbl.rawClear(); | |
118 } | |
119 | |
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120 public static int hash_value(LuanTable tbl) throws LuanException { |
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121 return tbl.hashValue(); |
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122 } |
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123 |
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124 public static boolean is_empty(LuanTable tbl) throws LuanException { |
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125 return tbl.rawIsEmpty(); |
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126 } |
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127 |
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128 public static int size(LuanTable tbl) throws LuanException { |
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129 return tbl.rawSize(); |
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130 } |
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131 |
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132 public static LuanTable toTable(Luan luan,Object obj) { |
1267 | 133 return luan.toTable(obj); |
134 } | |
135 | |
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136 } |