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1 package com.thoughtworks.xstream.converters.collections;
2
3 import com.thoughtworks.xstream.alias.ClassMapper;
4 import com.thoughtworks.xstream.converters.MarshallingContext;
5 import com.thoughtworks.xstream.converters.UnmarshallingContext;
6 import com.thoughtworks.xstream.core.JVM;
7 import com.thoughtworks.xstream.io.HierarchicalStreamReader;
8 import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
9
10 import java.util.HashMap  ;
11 import java.util.Hashtable ;
12 import java.util.Iterator ;
13 import java.util.Map ;
14
15
24 public class MapConverter extends AbstractCollectionConverter {
25
26 public MapConverter(ClassMapper classMapper, String classAttributeIdentifier) {
27 super(classMapper, classAttributeIdentifier);
28 }
29
30 public boolean canConvert(Class type) {
31 return type.equals(HashMap .class)
32 || type.equals(Hashtable .class)
33 || (JVM.is14() && type.getName().equals("java.util.LinkedHashMap"));
34 }
35
36 public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
37 Map map = (Map ) source;
38 for (Iterator iterator = map.entrySet().iterator(); iterator.hasNext();) {
39 Map.Entry entry = (Map.Entry ) iterator.next();
40 writer.startNode("entry");
41
42 writeItem(entry.getKey(), context, writer);
43 writeItem(entry.getValue(), context, writer);
44
45 writer.endNode();
46 }
47 }
48
49 public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
50 Map map = (Map ) createCollection(context.getRequiredType());
51 populateMap(reader, context, map);
52 return map;
53 }
54
55 protected void populateMap(HierarchicalStreamReader reader, UnmarshallingContext context, Map map) {
56 while (reader.hasMoreChildren()) {
57 reader.moveDown();
58
59 reader.moveDown();
60 Object key = readItem(reader, context, map);
61 reader.moveUp();
62
63 reader.moveDown();
64 Object value = readItem(reader, context, map);
65 reader.moveUp();
66
67 map.put(key, value);
68
69 reader.moveUp();
70 }
71 }
72
73 }
74 |
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