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annotate src/luan/LuanTable.java @ 88:6ca02b188dba

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add LuanBit to clean up code; add repr(); git-svn-id: https://luan-java.googlecode.com/svn/trunk@89 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Wed, 27 Feb 2013 23:50:32 +0000
parents 6db8f286fa6c
children 3c404a296995
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1
2df768b926aa start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
1 package luan;
2df768b926aa start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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2
27
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
3 import java.util.Iterator;
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57054fa43189 implement table lib
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4 import java.util.ListIterator;
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2df768b926aa start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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5 import java.util.Map;
2df768b926aa start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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6 import java.util.HashMap;
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7 import java.util.List;
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8 import java.util.ArrayList;
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9 import java.util.Collections;
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10 import java.util.Comparator;
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11 import java.util.Set;
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12 import java.util.HashSet;
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cd9dbd7477ca prevent stack overflow when printing table with circular references
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13 import java.util.IdentityHashMap;
88
6ca02b188dba add LuanBit to clean up code;
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14 import java.util.regex.Pattern;
1
2df768b926aa start Luan
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15
2df768b926aa start Luan
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16
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6ca02b188dba add LuanBit to clean up code;
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diff changeset
17 public final class LuanTable implements DeepCloneable<LuanTable>, Iterable<Map.Entry<Object,Object>>, LuanRepr {
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18 private Map<Object,Object> map = null;
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19 private List<Object> list = null;
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20 private LuanTable metatable = null;
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21
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22 public LuanTable() {}
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24 public LuanTable(List<Object> list) {
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25 this.list = list;
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26 }
1
2df768b926aa start Luan
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28 public LuanTable(Map<Object,Object> map) {
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29 this.map = map;
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30 }
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31
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32 public LuanTable(Set<Object> set) {
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33 map = new HashMap<Object,Object>();
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34 for( Object obj : set ) {
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35 map.put(obj,Boolean.TRUE);
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36 }
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37 }
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38
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39 @Override public LuanTable shallowClone() {
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40 return new LuanTable();
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41 }
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42
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43 @Override public void deepenClone(LuanTable clone,DeepCloner cloner) {
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44 if( map != null ) {
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45 clone.map = new HashMap<Object,Object>();
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46 for( Map.Entry<Object,Object> entry : map.entrySet() ) {
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47 clone.map.put( cloner.get(entry.getKey()), cloner.get(entry.getValue()) );
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48 }
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49 }
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50 if( list != null ) {
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51 clone.list = new ArrayList<Object>();
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52 for( Object obj : list ) {
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53 clone.list.add( cloner.get(obj) );
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54 }
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55 }
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56 if( metatable != null )
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57 clone.metatable = cloner.deepClone(metatable);
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58 }
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59
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60 public boolean isList() {
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61 return map==null || map.isEmpty();
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62 }
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63
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64 public List<Object> asList() {
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65 return list!=null ? list : Collections.emptyList();
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66 }
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68 public Map<Object,Object> asMap() {
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69 if( list == null || list.isEmpty() )
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70 return map!=null ? map : Collections.emptyMap();
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71 Map<Object,Object> rtn = map!=null ? new HashMap<Object,Object>(map) : new HashMap<Object,Object>();
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72 for( ListIterator iter = list.listIterator(); iter.hasNext(); ) {
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73 int i = iter.nextIndex();
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74 rtn.put(i+1,iter.next());
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75 }
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76 return rtn;
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77 }
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78
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79 public boolean isSet() {
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80 if( list != null ) {
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81 for( Object obj : list ) {
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82 if( obj!=null && !obj.equals(Boolean.TRUE) )
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83 return false;
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84 }
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85 }
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86 if( map != null ) {
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87 for( Object obj : map.values() ) {
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88 if( !obj.equals(Boolean.TRUE) )
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89 return false;
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90 }
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91 }
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92 return true;
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93 }
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94
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95 public Set<Object> asSet() {
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96 if( list == null || list.isEmpty() )
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97 return map!=null ? map.keySet() : Collections.emptySet();
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98 Set<Object> rtn = map!=null ? new HashSet<Object>(map.keySet()) : new HashSet<Object>();
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99 for( int i=1; i<=list.size(); i++ ) {
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100 rtn.add(i);
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101 }
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102 return rtn;
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103 }
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104
1
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105 @Override public String toString() {
81
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106 return "table: " + Integer.toHexString(hashCode());
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107 }
84
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108
88
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diff changeset
109 public String repr() {
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110 return repr( Collections.newSetFromMap(new IdentityHashMap<LuanTable,Boolean>()) );
72
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111 }
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112
88
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113 private String repr(Set<LuanTable> set) {
72
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114 if( !set.add(this) ) {
88
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115 return "\"<circular reference>\"";
72
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116 }
47
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117 StringBuilder sb = new StringBuilder();
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diff changeset
118 sb.append('{');
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119 boolean isFirst = true;
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120 if( list != null ) {
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121 boolean gotNull = false;
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122 for( int i=0; i<list.size(); i++ ) {
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123 Object obj = list.get(i);
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124 if( obj==null ) {
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125 gotNull = true;
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126 } else {
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127 if( isFirst ) {
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128 isFirst = false;
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129 } else {
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130 sb.append(", ");
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131 }
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132 if( gotNull )
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diff changeset
133 sb.append(i+1).append('=');
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134 sb.append(repr(set,obj));
47
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135 }
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136 }
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137 }
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diff changeset
138 if( map != null ) {
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139 for( Map.Entry<Object,Object> entry : map.entrySet() ) {
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diff changeset
140 if( isFirst ) {
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diff changeset
141 isFirst = false;
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142 } else {
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diff changeset
143 sb.append(", ");
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144 }
88
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diff changeset
145 sb.append(reprKey(set,entry.getKey())).append('=').append(repr(set,entry.getValue()));
47
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146 }
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147 }
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diff changeset
148 sb.append('}');
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diff changeset
149 return sb.toString();
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150 }
2df768b926aa start Luan
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151
88
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152 private static final Pattern namePtn = Pattern.compile("[a-zA-Z_][a-zA-Z_0-9]*");
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153
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diff changeset
154 private static String reprKey(Set<LuanTable> set,Object obj) {
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diff changeset
155 if( obj instanceof String ) {
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diff changeset
156 String s = (String)obj;
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diff changeset
157 if( namePtn.matcher(s).matches() )
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diff changeset
158 return s;
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diff changeset
159 }
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diff changeset
160 return "[" + repr(set,obj) + "]";
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diff changeset
161 }
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diff changeset
162
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diff changeset
163 private static String repr(Set<LuanTable> set,Object obj) {
72
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diff changeset
164 if( obj instanceof LuanTable ) {
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diff changeset
165 LuanTable t = (LuanTable)obj;
88
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diff changeset
166 return t.repr(set);
72
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diff changeset
167 } else {
88
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diff changeset
168 String s = Luan.repr(obj);
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diff changeset
169 if( s == null )
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diff changeset
170 s = "\"<couldn't repr: " + Luan.stringEncode(Luan.toString(obj)) + ">\"";
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diff changeset
171 return s;
72
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diff changeset
172 }
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173 }
84
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diff changeset
174
1
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175 public Object get(Object key) {
46
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diff changeset
176 if( list != null ) {
48
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diff changeset
177 Integer iT = Luan.asInteger(key);
46
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diff changeset
178 if( iT != null ) {
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diff changeset
179 int i = iT - 1;
44
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diff changeset
180 if( i>=0 && i<list.size() )
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181 return list.get(i);
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182 }
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183 }
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diff changeset
184 if( map==null )
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diff changeset
185 return null;
1
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diff changeset
186 return map.get(key);
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187 }
2df768b926aa start Luan
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188
35
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diff changeset
189 public Object put(Object key,Object val) {
48
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diff changeset
190 Integer iT = Luan.asInteger(key);
46
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diff changeset
191 if( iT != null ) {
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diff changeset
192 int i = iT - 1;
47
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diff changeset
193 if( list != null || i == 0 ) {
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diff changeset
194 if( i == list().size() ) {
46
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diff changeset
195 if( val != null ) {
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diff changeset
196 list.add(val);
47
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diff changeset
197 mapToList();
46
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diff changeset
198 }
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diff changeset
199 return null;
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diff changeset
200 } else if( i>=0 && i<list.size() ) {
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parents: 44
diff changeset
201 Object old = list.get(i);
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diff changeset
202 list.set(i,val);
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diff changeset
203 if( val == null && i == list.size()-1 ) {
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diff changeset
204 while( i>=0 && list.get(i)==null ) {
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diff changeset
205 list.remove(i--);
44
57054fa43189 implement table lib
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diff changeset
206 }
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207 }
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208 return old;
44
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209 }
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210 }
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211 }
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212 if( map==null ) {
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213 map = new HashMap<Object,Object>();
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214 }
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215 if( key instanceof Number && !(key instanceof Double) ) {
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216 Number n = (Number)key;
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217 key = Double.valueOf(n.doubleValue());
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218 }
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219 if( val == null ) {
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220 return map.remove(key);
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221 } else {
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222 return map.put(key,val);
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223 }
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224 }
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225
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226 private void mapToList() {
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227 if( map != null ) {
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228 while(true) {
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229 Object v = map.remove(Double.valueOf(list.size()+1));
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230 if( v == null )
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231 break;
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232 list.add(v);
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233 }
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234 }
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235 }
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236
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237 private List<Object> list() {
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238 if( list == null ) {
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239 list = new ArrayList<Object>();
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240 mapToList();
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241 }
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242 return list;
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243 }
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244
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245 public void insert(int pos,Object value) {
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246 list().add(pos-1,value);
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247 }
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248
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249 public Object remove(int pos) {
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250 return list().remove(pos-1);
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251 }
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252
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253 public void sort(Comparator<Object> cmp) {
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254 Collections.sort(list(),cmp);
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255 }
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256
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257 public int length() {
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258 return list==null ? 0 : list.size();
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259 }
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260
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261 public Iterator<Map.Entry<Object,Object>> iterator() {
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262 if( list == null ) {
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263 if( map == null )
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264 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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265 return map.entrySet().iterator();
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266 }
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267 if( map == null )
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268 return listIterator();
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269 return new Iterator<Map.Entry<Object,Object>>() {
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270 Iterator<Map.Entry<Object,Object>> iter = listIterator();
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271 boolean isList = true;
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272 public boolean hasNext() {
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273 boolean b = iter.hasNext();
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274 if( !b && isList ) {
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275 iter = map.entrySet().iterator();
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276 isList = false;
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277 b = iter.hasNext();
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278 }
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279 return b;
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280 }
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281 public Map.Entry<Object,Object> next() {
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282 return iter.next();
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283 }
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284 public void remove() {
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285 throw new UnsupportedOperationException();
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286 }
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287 };
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288 }
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289
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290 public Iterator<Map.Entry<Object,Object>> listIterator() {
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291 if( list == null )
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292 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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293 final ListIterator iter = list.listIterator();
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294 return new Iterator<Map.Entry<Object,Object>>() {
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295 public boolean hasNext() {
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296 return iter.hasNext();
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297 }
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298 public Map.Entry<Object,Object> next() {
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299 Double key = Double.valueOf(iter.nextIndex()+1);
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300 return new MapEntry(key,iter.next());
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301 }
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302 public void remove() {
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303 throw new UnsupportedOperationException();
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304 }
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305 };
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306 }
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307
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308 public Object[] listToArray() {
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309 return list==null ? new Object[0] : list.toArray();
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310 }
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311
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312 public LuanTable subList(int from,int to) {
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313 return new LuanTable(new ArrayList<Object>(list().subList(from-1,to-1)));
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314 }
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315
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316 public LuanTable getMetatable() {
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317 return metatable;
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318 }
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319
48
64ecb7a3aad7 rename Lua to Luan
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320 public void setMetatable(LuanTable metatable) {
35
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321 this.metatable = metatable;
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322 }
44
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323
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324 private static final class MapEntry implements Map.Entry<Object,Object> {
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325 private final Object key;
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326 private final Object value;
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327
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328 MapEntry(Object key,Object value) {
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329 this.key = key;
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330 this.value = value;
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331 }
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332
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333 @Override public Object getKey() {
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334 return key;
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335 }
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336
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337 @Override public Object getValue() {
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338 return value;
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339 }
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340
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341 @Override public Object setValue(Object value) {
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342 throw new UnsupportedOperationException();
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343 }
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344 }
1
2df768b926aa start Luan
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345 }