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annotate src/luan/LuanTable.java @ 72:cd9dbd7477ca

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prevent stack overflow when printing table with circular references git-svn-id: https://luan-java.googlecode.com/svn/trunk@73 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 12 Feb 2013 05:44:15 +0000
parents f7e17cfb35f9
children 4bf3d0c0b6b9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
1 package luan;
2df768b926aa start Luan
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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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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
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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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13 import java.util.IdentityHashMap;
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2df768b926aa start Luan
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14
2df768b926aa start Luan
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15
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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16 public class LuanTable {
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17 private Map<Object,Object> map = null;
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18 private List<Object> list = null;
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19 private LuanTable metatable = null;
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21 public LuanTable() {}
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23 public LuanTable(List<Object> list) {
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24 this.list = list;
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25 }
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27 public LuanTable(Map<Object,Object> map) {
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28 this.map = map;
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29 }
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31 public LuanTable(Set<Object> set) {
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32 map = new HashMap<Object,Object>();
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33 for( Object obj : set ) {
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34 map.put(obj,Boolean.TRUE);
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35 }
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36 }
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37
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38 public boolean isList() {
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39 return map==null || map.isEmpty();
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40 }
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41
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42 public List<Object> asList() {
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43 return list!=null ? list : Collections.emptyList();
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44 }
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45
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46 public Map<Object,Object> asMap() {
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47 if( list == null || list.isEmpty() )
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48 return map!=null ? map : Collections.emptyMap();
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49 Map<Object,Object> rtn = map!=null ? new HashMap<Object,Object>(map) : new HashMap<Object,Object>();
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50 for( ListIterator iter = list.listIterator(); iter.hasNext(); ) {
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51 int i = iter.nextIndex();
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52 rtn.put(i+1,iter.next());
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53 }
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54 return rtn;
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55 }
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57 public boolean isSet() {
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58 if( list != null ) {
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59 for( Object obj : list ) {
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60 if( obj!=null && !obj.equals(Boolean.TRUE) )
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61 return false;
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62 }
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63 }
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64 if( map != null ) {
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65 for( Object obj : map.values() ) {
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66 if( !obj.equals(Boolean.TRUE) )
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67 return false;
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68 }
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69 }
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70 return true;
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71 }
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72
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73 public Set<Object> asSet() {
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74 if( list == null || list.isEmpty() )
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75 return map!=null ? map.keySet() : Collections.emptySet();
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76 Set<Object> rtn = map!=null ? new HashSet<Object>(map.keySet()) : new HashSet<Object>();
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77 for( int i=1; i<=list.size(); i++ ) {
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78 rtn.add(i);
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79 }
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80 return rtn;
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81 }
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82
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83 @Override public String toString() {
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84 return toString( Collections.newSetFromMap(new IdentityHashMap<LuanTable,Boolean>()) );
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85 }
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87 private String toString(Set<LuanTable> set) {
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88 // return "table: " + Integer.toHexString(hashCode());
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89 if( !set.add(this) ) {
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90 return "...";
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91 }
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92 StringBuilder sb = new StringBuilder();
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93 sb.append('{');
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94 boolean isFirst = true;
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95 if( list != null ) {
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96 boolean gotNull = false;
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97 for( int i=0; i<list.size(); i++ ) {
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98 Object obj = list.get(i);
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99 if( obj==null ) {
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100 gotNull = true;
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101 } else {
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102 if( isFirst ) {
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103 isFirst = false;
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104 } else {
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105 sb.append(", ");
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106 }
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diff changeset
107 if( gotNull )
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diff changeset
108 sb.append(i+1).append('=');
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diff changeset
109 sb.append(toString(set,obj));
47
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110 }
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111 }
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112 }
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113 if( map != null ) {
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114 for( Map.Entry<Object,Object> entry : map.entrySet() ) {
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115 if( isFirst ) {
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116 isFirst = false;
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117 } else {
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118 sb.append(", ");
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119 }
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120 sb.append(toString(set,entry.getKey())).append('=').append(toString(set,entry.getValue()));
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121 }
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122 }
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123 sb.append('}');
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124 return sb.toString();
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125 }
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126
72
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127 private static String toString(Set<LuanTable> set,Object obj) {
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128 if( obj instanceof LuanTable ) {
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129 LuanTable t = (LuanTable)obj;
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130 return t.toString(set);
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131 } else {
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132 return Luan.toString(obj);
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133 }
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134 }
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135
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136 public Object get(Object key) {
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137 if( list != null ) {
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138 Integer iT = Luan.asInteger(key);
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139 if( iT != null ) {
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140 int i = iT - 1;
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141 if( i>=0 && i<list.size() )
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142 return list.get(i);
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143 }
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144 }
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145 if( map==null )
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146 return null;
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147 return map.get(key);
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148 }
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149
35
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diff changeset
150 public Object put(Object key,Object val) {
48
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diff changeset
151 Integer iT = Luan.asInteger(key);
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152 if( iT != null ) {
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153 int i = iT - 1;
47
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154 if( list != null || i == 0 ) {
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155 if( i == list().size() ) {
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156 if( val != null ) {
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157 list.add(val);
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158 mapToList();
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159 }
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160 return null;
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161 } else if( i>=0 && i<list.size() ) {
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162 Object old = list.get(i);
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163 list.set(i,val);
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164 if( val == null && i == list.size()-1 ) {
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165 while( i>=0 && list.get(i)==null ) {
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diff changeset
166 list.remove(i--);
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167 }
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168 }
46
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169 return old;
44
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170 }
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171 }
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172 }
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173 if( map==null ) {
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174 map = new HashMap<Object,Object>();
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175 }
46
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176 if( key instanceof Number && !(key instanceof Double) ) {
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177 Number n = (Number)key;
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178 key = Double.valueOf(n.doubleValue());
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179 }
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180 if( val == null ) {
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181 return map.remove(key);
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182 } else {
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183 return map.put(key,val);
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184 }
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185 }
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186
47
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187 private void mapToList() {
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188 if( map != null ) {
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189 while(true) {
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190 Object v = map.remove(Double.valueOf(list.size()+1));
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191 if( v == null )
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192 break;
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193 list.add(v);
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194 }
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195 }
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196 }
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197
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198 private List<Object> list() {
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199 if( list == null ) {
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200 list = new ArrayList<Object>();
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201 mapToList();
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diff changeset
202 }
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203 return list;
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204 }
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diff changeset
205
44
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diff changeset
206 public void insert(int pos,Object value) {
47
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207 list().add(pos-1,value);
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208 }
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diff changeset
209
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diff changeset
210 public Object remove(int pos) {
47
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211 return list().remove(pos-1);
44
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212 }
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213
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214 public void sort(Comparator<Object> cmp) {
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215 Collections.sort(list(),cmp);
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216 }
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217
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218 public int length() {
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219 return list==null ? 0 : list.size();
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220 }
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221
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222 public Iterator<Map.Entry<Object,Object>> iterator() {
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223 if( list == null ) {
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224 if( map == null )
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225 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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226 return map.entrySet().iterator();
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227 }
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228 if( map == null )
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229 return listIterator();
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230 return new Iterator<Map.Entry<Object,Object>>() {
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231 Iterator<Map.Entry<Object,Object>> iter = listIterator();
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232 boolean isList = true;
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233 public boolean hasNext() {
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234 boolean b = iter.hasNext();
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235 if( !b && isList ) {
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236 iter = map.entrySet().iterator();
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237 isList = false;
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238 b = iter.hasNext();
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239 }
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240 return b;
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241 }
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242 public Map.Entry<Object,Object> next() {
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243 return iter.next();
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244 }
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245 public void remove() {
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246 throw new UnsupportedOperationException();
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247 }
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248 };
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249 }
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250
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251 public Iterator<Map.Entry<Object,Object>> listIterator() {
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252 if( list == null )
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253 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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254 final ListIterator iter = list.listIterator();
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255 return new Iterator<Map.Entry<Object,Object>>() {
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256 public boolean hasNext() {
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257 return iter.hasNext();
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258 }
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259 public Map.Entry<Object,Object> next() {
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260 Double key = Double.valueOf(iter.nextIndex()+1);
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261 return new MapEntry(key,iter.next());
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262 }
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263 public void remove() {
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264 throw new UnsupportedOperationException();
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265 }
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266 };
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267 }
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268
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269 public Object[] listToArray() {
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270 return list==null ? new Object[0] : list.toArray();
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271 }
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272
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273 public LuanTable subList(int from,int to) {
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274 return new LuanTable(new ArrayList<Object>(list().subList(from-1,to-1)));
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275 }
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276
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277 public LuanTable getMetatable() {
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278 return metatable;
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279 }
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280
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281 public void setMetatable(LuanTable metatable) {
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282 this.metatable = metatable;
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283 }
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284
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285 private static final class MapEntry implements Map.Entry<Object,Object> {
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286 private final Object key;
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287 private final Object value;
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288
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289 MapEntry(Object key,Object value) {
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290 this.key = key;
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291 this.value = value;
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292 }
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293
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294 @Override public Object getKey() {
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295 return key;
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296 }
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297
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298 @Override public Object getValue() {
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299 return value;
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300 }
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301
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302 @Override public Object setValue(Object value) {
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303 throw new UnsupportedOperationException();
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304 }
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305 }
1
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306 }