package org.springside.examples.showcase.xml;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;
import javax.xml.bind.annotation.XmlValue;
import javax.xml.bind.annotation.adapters.XmlAdapter;
import org.springside.examples.showcase.xml.HouseMapAdapter.HouseMap.HouseEntry;
import com.google.common.collect.Maps;
/**
* 为使Map<String,String> houses转化为有业务意义的xml的巨大努力,
* 分别定义了一个Adapter--HouseMapAdapter, 一个List<HouseEntry> Wrapper类--HouseMap, 一个MapEntry表达类--HouseEntry.
* 最后的劳动成果是：
* <houses>
* <house key="bj">house1</item>
* <hosue key="gz">house2</item>
* </houses>
*
* @author calvin
*/
public class HouseMapAdapter extends XmlAdapter<HouseMapAdapter.HouseMap, Map<String, String>> {
@Override
public HouseMap marshal(Map<String, String> map) throws Exception {
HouseMap houseMap = new HouseMap();
for (Map.Entry<String, String> e : map.entrySet()) {
houseMap.entries.add(new HouseEntry(e));
}
return houseMap;
}
@Override
public Map<String, String> unmarshal(HouseMap houseMap) throws Exception {
Map<String, String> map = Maps.newLinkedHashMap();
for (HouseEntry e : houseMap.entries) {
map.put(e.key, e.value);
}
return map;
}
/**
* List<HouseEntry>的Adapter类.
* @author calvin
*/
@XmlType(name = "houses")
public static class HouseMap {
@XmlElement(name = "house")
List<HouseEntry> entries = new ArrayList<HouseEntry>();
/**
* HouseMap中的Entry类.
*/
static class HouseEntry {
@XmlAttribute
String key;
@XmlValue
String value;
public HouseEntry() {
}
public HouseEntry(Map.Entry<String, String> e) {
key = e.getKey();
value = e.getValue();
}
}
}
}