Mercurial Hosting > luan
annotate core/src/luan/modules/TableLuan.java @ 222:b76fcb72d97d
add AbstractLuanTable and improve HttpLuan
git-svn-id: https://luan-java.googlecode.com/svn/trunk@223 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Mon, 21 Jul 2014 02:23:05 +0000 |
parents | ec016471c6eb |
children | 8afe9f2fdfec |
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.LuanState; |
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9 import luan.LuanTable; |
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10 import luan.LuanFunction; |
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11 import luan.LuanJavaFunction; |
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12 import luan.LuanElement; |
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13 import luan.LuanException; |
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14 import luan.LuanRuntimeException; |
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15 |
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16 |
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17 public final class TableLuan { |
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18 |
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19 public static final LuanFunction LOADER = new LuanFunction() { |
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20 @Override public Object call(LuanState luan,Object[] args) { |
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21 LuanTable module = Luan.newTable(); |
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22 try { |
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23 add( module, "concat", LuanState.class, LuanTable.class, String.class, Integer.class, Integer.class ); |
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24 add( module, "insert", LuanTable.class, Integer.TYPE, Object.class ); |
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25 add( module, "pack", new Object[0].getClass() ); |
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26 add( module, "remove", LuanTable.class, Integer.TYPE ); |
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27 add( module, "sort", LuanState.class, LuanTable.class, LuanFunction.class ); |
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28 add( module, "sub_list", LuanTable.class, Integer.TYPE, Integer.TYPE ); |
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29 add( module, "unpack", LuanTable.class, Integer.class, Integer.class ); |
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30 } catch(NoSuchMethodException e) { |
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31 throw new RuntimeException(e); |
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32 } |
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33 return module; |
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34 } |
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35 }; |
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36 |
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37 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { |
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38 t.put( method, new LuanJavaFunction(TableLuan.class.getMethod(method,parameterTypes),null) ); |
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39 } |
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40 |
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41 public static String concat(LuanState luan,LuanTable list,String sep,Integer i,Integer j) throws LuanException { |
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42 int first = i==null ? 1 : i; |
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43 int last = j==null ? list.length() : j; |
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44 StringBuilder buf = new StringBuilder(); |
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45 for( int k=first; k<=last; k++ ) { |
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46 Object val = list.get(k); |
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47 if( val==null ) |
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48 break; |
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49 if( sep!=null && k > first ) |
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50 buf.append(sep); |
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51 String s = Luan.asString(val); |
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52 if( s==null ) |
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53 throw luan.exception( "invalid value ("+Luan.type(val)+") at index "+k+" in table for 'concat'" ); |
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54 buf.append(val); |
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55 } |
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56 return buf.toString(); |
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57 } |
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58 |
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59 public static void insert(LuanTable list,int pos,Object value){ |
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60 list.insert(pos,value); |
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61 } |
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62 |
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63 public static Object remove(LuanTable list,int pos) { |
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64 return list.remove(pos); |
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65 } |
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66 |
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67 private static interface LessThan { |
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68 public boolean isLessThan(Object o1,Object o2); |
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69 } |
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70 |
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71 public static void sort(final LuanState luan,LuanTable list,final LuanFunction comp) throws LuanException { |
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72 final LessThan lt; |
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73 if( comp==null ) { |
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74 lt = new LessThan() { |
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75 public boolean isLessThan(Object o1,Object o2) { |
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76 try { |
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77 return luan.isLessThan(o1,o2); |
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78 } catch(LuanException e) { |
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79 throw new LuanRuntimeException(e); |
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80 } |
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81 } |
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82 }; |
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83 } else { |
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84 lt = new LessThan() { |
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85 public boolean isLessThan(Object o1,Object o2) { |
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86 try { |
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87 return Luan.toBoolean(Luan.first(luan.call(comp,"comp-arg",new Object[]{o1,o2}))); |
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88 } catch(LuanException e) { |
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89 throw new LuanRuntimeException(e); |
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90 } |
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91 } |
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92 }; |
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93 } |
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94 try { |
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95 list.sort( new Comparator<Object>() { |
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96 public int compare(Object o1,Object o2) { |
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97 return lt.isLessThan(o1,o2) ? -1 : lt.isLessThan(o2,o1) ? 1 : 0; |
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98 } |
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99 } ); |
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100 } catch(LuanRuntimeException e) { |
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101 throw (LuanException)e.getCause(); |
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102 } |
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103 } |
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104 |
118
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105 public static LuanTable pack(Object... args) { |
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106 LuanTable tbl = Luan.newTable(); |
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107 boolean hasNull = false; |
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108 for( int i=0; i<args.length; i++ ) { |
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109 Object v = args[i]; |
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110 if( v==null ) { |
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111 hasNull = true; |
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112 } else if( !hasNull ) { |
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113 tbl.add(v); |
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114 } else { |
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115 tbl.put(i+1,v); |
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116 } |
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117 } |
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118 tbl.put( "n", args.length ); |
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119 return tbl; |
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120 } |
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121 |
118
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122 public static Object[] unpack(LuanTable tbl,Integer iFrom,Integer iTo) { |
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123 int from = iFrom!=null ? iFrom : 1; |
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124 int to = iTo!=null ? iTo : tbl.length(); |
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125 List<Object> list = new ArrayList<Object>(); |
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126 for( int i=from; i<=to; i++ ) { |
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127 list.add( tbl.get(i) ); |
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128 } |
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129 return list.toArray(); |
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130 } |
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131 |
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132 public static LuanTable sub_list(LuanTable list,int from,int to) { |
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133 return list.subList(from,to); |
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134 } |
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135 |
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136 } |