gistfile1.txt

public class MyLatestActivitySorterFactory implements NativeScriptFactory{
	
	protected ObjectMapper mapper;
											//2011-02-12 18:11:00.0
	private DateFormat myDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");

	private final static Log LOG = LogFactory.getLog(MyLatestActivitySorterFactory.class);

	@Override
	public ExecutableScript newScript(Map<String, Object> params) {
		if (mapper == null){
			mapper = new ObjectMapper();
			mapper.getDeserializationConfig().setDateFormat(myDateFormat);
			//mapper.getSerializationConfig().setDateFormat(myDateFormat);
		}
		return new MyLatestActivitySortScript(params);
	}
	
	
	class MyLatestActivitySortScript extends AbstractFloatSearchScript {

		private Map<String, Object> params;

		public MyLatestActivitySortScript(Map<String, Object> params) {
			this.params = params;
		}

		@Override
		public float runAsFloat() {
			DocLookup doc = doc();

			 StringDocFieldData myLatestActivitiesField = doc.field("myLatestActivitiesJson");
			 String myLatestActivityJSON = myLatestActivitiesField.getStringValue();
				LOG.info("MyLatest JSON\n" + myLatestActivityJSON);
				if (myLatestActivityJSON == null || myLatestActivityJSON.trim().equals("")){
					return 0;
				}
				
			 Map<Integer, Date> myLatestActivitiesMap = unMarshallMyLatestActivityMap(myLatestActivityJSON);
			 //String indexFieldName = (String)params.get("indexFieldName");
			 Integer userId = (Integer)params.get("userId");
			 Float score = getScore(myLatestActivitiesMap, userId);
			 LOG.info("MyLastActivity JSON[" + myLatestActivityJSON + "], gives score " + score);
			 String sortDirection = (String)params.get("sortDirection");
			 LOG.info("Sort Direction[" + sortDirection + "]");
			 if (sortDirection == null || (sortDirection != null && !sortDirection.toUpperCase().trim().equals("DESC"))){
				 LOG.info("Applying ASC sort order!");
				 score = 0- score;
			 }
			return score;
		}
    }
	
	public Float getScore(Map<Integer, Date> myLatestActivitiesMap, Integer userId){
		Date date = myLatestActivitiesMap.get(userId);
		Long time = date.getTime();
		Float score = time.floatValue();
		return score;
	}
	
	protected Map<Integer, Date> unMarshallMyLatestActivityMap(String myLatestActivityJSON) {
		
		Map<Integer, Date> myLatestActivitiesMap = null;
		try {
			myLatestActivitiesMap = (Map<Integer, Date>)mapper.readValue(myLatestActivityJSON, new TypeReference<HashMap<Integer, Date>>(){});
		} catch (Exception e){
			LOG.error("Error unmarshalling myLastestActivities JSON", e);
			return null;
		}
		return myLatestActivitiesMap;
	}
	
}