/** Only used by cache implementations */
protected void cacheInit() {
if (simpleCache != null || cacheWithWhereClause != null) return;
String where = context.getEntityAttribute("where");
String cacheKey = context.getEntityAttribute(CACHE_KEY);
String lookupKey = context.getEntityAttribute(CACHE_LOOKUP);
if (cacheKey != null && lookupKey == null) {
throw new DataImportHandlerException(
DataImportHandlerException.SEVERE,
"'cacheKey' is specified for the entity " + entityName + " but 'cacheLookup' is missing");
}
if (where == null && cacheKey == null) {
simpleCache = new HashMap<String, List<Map<String, Object>>>();
} else {
if (where != null) {
String[] splits = where.split("=");
cachePk = splits[0];
cacheVariableName = splits[1].trim();
} else {
cachePk = cacheKey;
cacheVariableName = lookupKey;
}
cacheWithWhereClause = new HashMap<String, Map<Object, List<Map<String, Object>>>>();
}
}
/**
* If the where clause is present the cache is sql Vs Map of key Vs List of Rows. Only used by
* cache implementations.
*
* @param query the query string for which cached data is to be returned
* @return the cached row corresponding to the given query after all variables have been resolved
*/
protected Map<String, Object> getIdCacheData(String query) {
Map<Object, List<Map<String, Object>>> rowIdVsRows = cacheWithWhereClause.get(query);
List<Map<String, Object>> rows = null;
Object key = context.resolve(cacheVariableName);
if (key == null) {
throw new DataImportHandlerException(
DataImportHandlerException.WARN,
"The cache lookup value : "
+ cacheVariableName
+ " is resolved to be null in the entity :"
+ context.getEntityAttribute("name"));
}
if (rowIdVsRows != null) {
rows = rowIdVsRows.get(key);
if (rows == null) return null;
dataSourceRowCache = new ArrayList<Map<String, Object>>(rows);
return getFromRowCacheTransformed();
} else {
rows = getAllNonCachedRows();
if (rows.isEmpty()) {
return null;
} else {
rowIdVsRows = new HashMap<Object, List<Map<String, Object>>>();
for (Map<String, Object> row : rows) {
Object k = row.get(cachePk);
if (k == null) {
throw new DataImportHandlerException(
DataImportHandlerException.WARN,
"No value available for the cache key : "
+ cachePk
+ " in the entity : "
+ context.getEntityAttribute("name"));
}
if (!k.getClass().equals(key.getClass())) {
throw new DataImportHandlerException(
DataImportHandlerException.WARN,
"The key in the cache type : "
+ k.getClass().getName()
+ "is not same as the lookup value type "
+ key.getClass().getName()
+ " in the entity "
+ context.getEntityAttribute("name"));
}
if (rowIdVsRows.get(k) == null) rowIdVsRows.put(k, new ArrayList<Map<String, Object>>());
rowIdVsRows.get(k).add(row);
}
cacheWithWhereClause.put(query, rowIdVsRows);
if (!rowIdVsRows.containsKey(key)) return null;
dataSourceRowCache = new ArrayList<Map<String, Object>>(rowIdVsRows.get(key));
if (dataSourceRowCache.isEmpty()) {
dataSourceRowCache = null;
return null;
}
return getFromRowCacheTransformed();
}
}
}
/** first time init call. do one-time operations here */
protected void firstInit(Context context) {
entityName = context.getEntityAttribute("name");
String s = context.getEntityAttribute(ON_ERROR);
if (s != null) onError = s;
isFirstInit = false;
}
