public List<Invoice> getEntriesByParam(Invoice param, String pagesize, String nextId,Condition condition) {

DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();

Query query = new Query(Invoice.class.getSimpleName());

// 検索項目（Indexがあるもの） を指定してnewする

QueryUtils queryUtils = new QueryUtils(new String[]{"invoiceNo","companyName","job","issuedDate"});

// paramの検索項目がnullでなければaddFiler(FilterOperator.EQUAL)される

queryUtils.setParam(param, query);

if (nextId != null) {

query.addFilter("id", Query.FilterOperator.GREATER_THAN , Long.parseLong(nextId));

}

query.addSort("id");

int limit = DEFAULT_PAGESIZE;

if (pagesize != null) {

limit = Integer.parseInt(pagesize);

}

// Fetch Option

FetchOptions fetchOptions = FetchOptions.Builder.withLimit(limit);

Iterable<Entity> resultIterable = datastore.prepare(query).asIterable(fetchOptions);

EntityConverter entityConverter = new EntityConverter();

List<Invoice> result = entityConverter.convert(Invoice.class, resultIterable,null,condition);

return result;

}