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annotate core/src/luan/modules/TableLuan.java @ 574:6cc2f047019b

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remove LuanState.call()
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 13 Jul 2015 12:31:53 -0600
parents f1601a4ce1aa
children 7c3ad6db8ac3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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4c0131c2b650 merge luan/lib into modules
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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.LuanException;
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12 import luan.LuanRuntimeException;
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13 import luan.LuanMethod;
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14 import luan.LuanPropertyMeta;
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16
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ebe9db183eb7 rename *Lib.java to *Luan.java
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17 public final class TableLuan {
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18
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19 public static String concat(LuanState luan,LuanTable list,String sep,Integer i,Integer j) throws LuanException {
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20 int first = i==null ? 1 : i;
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21 int last = j==null ? list.length(luan.JAVA) : j;
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22 StringBuilder buf = new StringBuilder();
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23 for( int k=first; k<=last; k++ ) {
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24 Object val = list.get(luan.JAVA,k);
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25 if( val==null )
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26 break;
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27 if( sep!=null && k > first )
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28 buf.append(sep);
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29 String s = luan.JAVA.toString(val);
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30 buf.append(s);
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31 }
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32 return buf.toString();
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33 }
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34
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35 public static void insert(LuanState luan,LuanTable list,int pos,Object value) throws LuanException {
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36 if( list.getMetatable() != null )
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37 throw luan.exception("can't insert into a table with a metatable");
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38 list.rawInsert(pos,value);
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39 }
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41 public static Object remove(LuanState luan,LuanTable list,int pos) throws LuanException {
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42 if( list.getMetatable() != null )
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43 throw luan.exception("can't remove from a table with a metatable");
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44 return list.rawRemove(pos);
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45 }
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47 private static interface LessThan {
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48 public boolean isLessThan(Object o1,Object o2);
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49 }
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50
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51 public static void sort(final LuanState luan,LuanTable list,final LuanFunction comp) throws LuanException {
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52 if( list.getMetatable() != null )
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53 throw luan.exception("can't sort a table with a metatable");
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54 final LessThan lt;
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55 if( comp==null ) {
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56 lt = new LessThan() {
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57 public boolean isLessThan(Object o1,Object o2) {
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58 try {
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59 return luan.isLessThan(o1,o2);
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60 } catch(LuanException e) {
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61 throw new LuanRuntimeException(e);
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62 }
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63 }
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64 };
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65 } else {
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66 lt = new LessThan() {
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67 public boolean isLessThan(Object o1,Object o2) {
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68 try {
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69 return luan.checkBoolean(Luan.first(comp.call(luan,new Object[]{o1,o2})));
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70 } catch(LuanException e) {
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71 throw new LuanRuntimeException(e);
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72 }
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73 }
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74 };
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75 }
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76 try {
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77 list.rawSort( new Comparator<Object>() {
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78 public int compare(Object o1,Object o2) {
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79 return lt.isLessThan(o1,o2) ? -1 : lt.isLessThan(o2,o1) ? 1 : 0;
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80 }
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81 } );
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82 } catch(LuanRuntimeException e) {
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83 throw (LuanException)e.getCause();
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84 }
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85 }
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86
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87 public static LuanTable pack(Object... args) {
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88 LuanTable tbl = new LuanTable(Arrays.asList(args));
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89 tbl.rawPut( "n", args.length );
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90 return tbl;
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91 }
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92
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93 @LuanMethod public static Object[] unpack(LuanState luan,LuanTable tbl,Integer iFrom,Integer iTo) throws LuanException {
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94 int from = iFrom!=null ? iFrom : 1;
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95 int to = iTo!=null ? iTo : tbl.length(luan.JAVA);
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96 List<Object> list = new ArrayList<Object>();
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97 for( int i=from; i<=to; i++ ) {
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98 list.add( tbl.get(luan.JAVA,i) );
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99 }
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100 return list.toArray();
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101 }
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102
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103 public static LuanTable copy(LuanTable list,Integer from,Integer to) {
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104 if( from == null )
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105 return new LuanTable(list);
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106 if( to == null )
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107 to = list.rawLength();
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108 return list.rawSubList(from,to);
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109 }
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110
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111 public static LuanTable new_property_table() {
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112 return LuanPropertyMeta.INSTANCE.newTable();
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57054fa43189 implement table lib
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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