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1466
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1 package luan.modules.parsers;
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2
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3 import java.util.Collections;
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4 import java.util.Map;
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5 import java.util.LinkedHashMap;
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6 import java.util.List;
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7 import java.util.ArrayList;
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8 import goodjava.parser.ParseException;
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9 import goodjava.xml.XmlElement;
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10 import goodjava.xml.XmlParser;
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11 import luan.Luan;
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12 import luan.LuanTable;
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13 import luan.LuanException;
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14
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15
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16 public final class Xml {
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17
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18 public static String toString(LuanTable tbl) throws LuanException {
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19 if( tbl.rawSize() != 1 )
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20 throw new LuanException("XML most have 1 root element");
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21 Map.Entry entry = tbl.iterator().next();
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22 Object key = entry.getKey();
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23 if( !(key instanceof String) )
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24 throw new LuanException("XML key must be string");
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25 String name = (String)key;
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26 Object value = entry.getValue();
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27 if( !(value instanceof LuanTable) )
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28 throw new LuanException("XML root value must be table");
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29 LuanTable t = (LuanTable)value;
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30 Map<String,String> attributes = attributes(t);
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31 XmlElement[] elements = elements(t);
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32 XmlElement element = new XmlElement(name,attributes,elements);
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33 return element.toString();
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34 }
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35
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36 private static final Integer ONE = new Integer(1);
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37
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38 private static Map<String,String> attributes(LuanTable tbl) throws LuanException {
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39 Object obj = tbl.get(ONE);
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40 if( obj==null )
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41 return Collections.emptyMap();
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42 LuanTable t = (LuanTable)obj;
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43 Map<String,String> map = new LinkedHashMap<String,String>();
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44 for( Map.Entry entry : t.iterable() ) {
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45 String name =(String)entry.getKey();
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46 String value =(String)entry.getValue();
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47 map.put(name,value);
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48 }
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49 return map;
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50 }
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51
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52 private static XmlElement[] elements(LuanTable tbl) throws LuanException {
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53 List<XmlElement> list = new ArrayList<XmlElement>();
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54 for( Map.Entry entry : tbl.iterable() ) {
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55 Object key = entry.getKey();
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56 if( key.equals(ONE) )
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57 continue;
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58 String name = (String)key;
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59 Object value = entry.getValue();
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60 XmlElement element;
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61 if( value instanceof String ) {
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62 String s = (String)value;
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63 element = new XmlElement(name,Collections.emptyMap(),s);
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64 } else {
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65 LuanTable t = (LuanTable)value;
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66 Map<String,String> attributes = attributes(t);
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67 XmlElement[] elements = elements(t);
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68 element = new XmlElement(name,attributes,elements);
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69 }
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70 list.add(element);
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71 }
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72 return list.toArray(new XmlElement[0]);
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73 }
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74
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75
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76 public static LuanTable parse(Luan luan,String s) throws ParseException, LuanException {
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77 XmlElement element = XmlParser.parse(s);
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78 return toTable(luan,new XmlElement[]{element});
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79 }
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80
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81 private static LuanTable toTable(Luan luan,XmlElement[] elements) throws LuanException {
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82 LuanTable tbl = new LuanTable(luan);
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83 for( XmlElement element : elements ) {
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84 if( element.content instanceof String ) {
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85 tbl.put(element.name,element.content);
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86 } else {
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87 XmlElement[] els = (XmlElement[])element.content;
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88 LuanTable t = toTable(luan,els);
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89 tbl.put(element.name,t);
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90 }
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91 }
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92 return tbl;
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93 }
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94
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95 }
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