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annotate core/src/luan/AbstractLuanTable.java @ 284:8870840251ea

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use LinkedHashMap in LuanTable to preserve order git-svn-id: https://luan-java.googlecode.com/svn/trunk@285 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 02 Dec 2014 03:55:33 +0000
parents 8afe9f2fdfec
children 9fb523472035
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1 package luan;
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3 import java.util.Iterator;
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4 import java.util.ListIterator;
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5 import java.util.Map;
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6 import java.util.LinkedHashMap;
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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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14 import java.util.regex.Pattern;
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17 public abstract class AbstractLuanTable implements LuanTable {
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19 protected final Map<Object,Object> newMap() {
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20 return new LinkedHashMap<Object,Object>();
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21 }
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23 protected final Map<Object,Object> newMap(Map<Object,Object> map) {
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24 return new LinkedHashMap<Object,Object>(map);
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25 }
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27 @Override public boolean isEmpty() {
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28 return isList() && length()==0;
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29 }
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31 @Override public boolean isList() {
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32 return asList().size() == asMap().size();
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33 }
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35 @Override public List<Object> asList() {
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36 return Collections.emptyList();
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37 }
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39 @Override public Map<Object,Object> asMap() {
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40 Map<Object,Object> map = newMap();
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41 for( Map.Entry<Object,Object> entry : this ) {
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42 map.put(entry.getKey(),entry.getValue());
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43 }
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44 return map;
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45 }
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47 protected abstract String type();
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49 @Override public final String toString() {
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50 return type() + ": " + Integer.toHexString(hashCode());
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51 }
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53 @Override public void put(Object key,Object val) {
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54 throw new UnsupportedOperationException("can't put into a "+type());
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55 }
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57 @Override public void insert(int pos,Object value) {
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58 throw new UnsupportedOperationException("can't insert into a "+type());
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59 }
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61 @Override public void add(Object value) {
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62 throw new UnsupportedOperationException("can't add to a "+type());
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63 }
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65 @Override public Object remove(int pos) {
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66 throw new UnsupportedOperationException("can't remove from a "+type());
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67 }
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69 @Override public void sort(Comparator<Object> cmp) {
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70 }
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72 @Override public int length() {
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73 return 0;
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74 }
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76 @Override public LuanTable subList(int from,int to) {
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77 throw new UnsupportedOperationException("can't get a sub-list of a "+type());
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78 }
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80 @Override public LuanTable getMetatable() {
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81 return null;
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82 }
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84 @Override public void setMetatable(LuanTable metatable) {
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85 throw new UnsupportedOperationException("can't set a metatable on a "+type());
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86 }
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88 @Override public LuanTable cloneTable() {
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89 return isList() ? new LuanTableImpl(new ArrayList<Object>(asList())) : new LuanTableImpl(newMap(asMap()));
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90 }
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91 }