Develop Reference

How to retrieve only the children which meet a criteria using query in a jpa repository

So I have a parent Class with two OneToMany child classes one of which have another two One to many child classes and I'm executing the following query:
#Query("Select distinct fg "
+ " from FaqGroupEntity fg "
+ " left join fg.names fgn "
+ " left join fg.faqs f "
+ " left join f.content fc "
+ " left join f.tags ft "
+ " where fgn.language.id = :language "
+ " and (fc.language.id is null or fc.language.id = :language) "
+ " and (ft.language.id is null or ft.language.id = :language)")
List<FaqGroupEntity> findAllByLanguage(#Param("language") int language);
It seems to be doing the query right but it's populating each of the "faq" children with all the values regardless of language.
Here's The FaqGroupEntity
#Entity
#Table(name = "FAQ_GROUP")
#Getter #Setter
public class FaqGroupEntity {
#GeneratedValue(generator = "UUID")
#GenericGenerator(
name = "UUID",
strategy = "org.hibernate.id.UUIDGenerator"
)
#Id
#Column(name = "ID")
private String id;
#OneToMany(mappedBy="group" ,cascade = CascadeType.ALL, orphanRemoval = true)
private List<FaqGroupNameEntity> names;
#OneToMany
#JoinColumn(name = "GROUP_ID")
private List<FaqEntity> faqs;
}

TypedQuery implementation problems

Hi everyone, I'm having problems. I have implemented TypedQuery in a module of my web system and everything works perfectly. But when making another module and implementing TypedQuery again it doesn't work anymore I would appreciate your opinion.
I leave a portion of my code with example.
#Service
public class AccountService {
private EntityManager em;
private AccountRepository accountRepository;
public AccountService(EntityManager em, AccountRepository accountRepository) {
this.em = em;
this.accountRepository = accountRepository;
}
public List<Account> getChartOfAccounts() {
List<Account> retList = null;
TypedQuery<Account> query = em.createQuery(
"select new com.javatmp.module.accounting.entity.Account("
+ "acct.id, acct.accountCode, acct.name, acct.parentAccountId, "
+ "sum(case when att.amount > 0 then att.amount else 0 end),"
+ "sum(case when att.amount < 0 then (att.amount * -1) else 0 end), "
+ "sum(case when coalesce(att.amount, 0) > 0 then (abs(coalesce(att.amount, 0)) * coalesce(at.debitSign, 0)) "
+ "else (abs(coalesce(att.amount, 0)) * coalesce(at.creditSign, 0)) end), "
+ "acct.accountGroupId, acct.cashFlowId, ag.name, at.name, at.debitSign, at.creditSign, at.reportTypeId)"
+ " from Account acct"
+ " left outer join AccountTransaction att on acct.id = att.accountId"
+ " left outer join Transaction trans on att.transactionId = trans.id"
+ " left outer join AccountGroup ag on acct.accountGroupId = ag.id"
+ " left outer join AccountType at on at.id = ag.accountType"
+ " group by acct.id, acct.accountCode, acct.name, acct.parentAccountId, acct.accountGroupId,"
+ "acct.cashFlowId, ag.name, at.name, at.debitSign, at.creditSign, at.reportTypeId"
+ "", Account.class
);
retList = query.getResultList();
return retList;
}
The previous code worked very well now that I have tried to make a new module, it does not work, it indicates that the variables have not been declared. ex.
#Service
public class BudgetService {
private EntityManager em;
private BudgetRepository BudgetRepository;
public BudgetService(EntityManager em, BudgetRepository budgetRepository) {
this.em = em;
this.budgetRepository = budgetRepository;
}
public List<Budget> getBudgetPage() {
List<Budget> retList = null;
TypedQuery<Budget> query = em.createQuery(
"select new com.javatmp.module.project.entity.Budget("
+ "budget.id, budget.budgetCode, budget.name, "//where the issues start, the variables are not defined
...
+ "", Budget.class
);
retList = query.getResultList();
return retList;
}

Unable to cover List<Tuple> in JUnit Test case

In my code i have used List < Tuple > to capture the query results by joining various
tables and mapping to DTO object. This code works fine in the main. But
when i try to create a test case, i'm unable to cover the List < Tuple > code.
Please provide your inputs.
For Ex :
#SuppressWarnings("unchecked")
private List<FeedbackDTO> getList(String sortingProperty, String direction, UUID workflowId, UUID categoryId,
String type) {
StringBuilder query = new StringBuilder(
"select feedback.id, feedback.workflowId, user.userName, user.firstName, "
+ "user.lastName, feedback.submittedDate, country.countryName, "
+ "region.regionName, feedback.comments, feedback.ratings, feedback.acknowledged "
+ "from Feedback feedback, User user, Country country, Region region "
+ "where feedback.userId = user.id and user.countryId = country.id and user.regionId = region.id "
+ "and feedback.workflowId = " + "'" + workflowId + "'" + " and feedback.categoryId = " + "'"
+ categoryId + "'" + " and feedback.type = " + "'" + type + "'" + " order by ");
if (sortingProperty.equalsIgnoreCase("firstName")) {
query.append("user.firstName ");
}
query.append(direction);
Query queryList = entityManager.createNativeQuery(query.toString(), Tuple.class);
List<Tuple> tupleList = queryList.getResultList();
List<FeedbackDTO> feedbackList = new ArrayList<FeedbackDTO>();
for (Tuple tuple : tupleList) {
FeedbackDTO feedbackDTO = new FeedbackDTO();
feedbackDTO.setId(UUID.fromString((String) tuple.get("id")));
feedbackDTO.setUserName((String) tuple.get("userName"));
feedbackDTO.setFirstName((String) tuple.get("firstName"));
feedbackDTO.setLastName((String) tuple.get("lastName"));
feedbackDTO.setCountryName((String) tuple.get("countryName"));
feedbackDTO.setAcknowledged((Boolean) tuple.get("acknowledged"));
feedbackDTO.setRegionName((String) tuple.get("regionName"));
feedbackDTO.setComments((String) tuple.get("comments"));
feedbackDTO.setSubmittedDate((Date) tuple.get("submittedDate"));
feedbackDTO.setRatings((Double) tuple.get("ratings"));
feedbackList.add(feedbackDTO);
}
return feedbackList;
}
In My Test Case:
#Test
public void testGetFeedbackListNoFeedback() {
try {
Query queryList = mock(Query.class);
FeedbackTestDTO feedback = new FeedbackTestDTO();
feedback.setId(id);
feedback.setSolutionId(solutionId);
feedback.setComments("Please swich-on the power");
feedback.setType("Alternate Solution");
List<Object> tupleList = new ArrayList<>();
tupleList.add(feedback);
StringBuilder query = new StringBuilder(
"select * from feedback order by user.firstName ASC");
Sort sort = new Sort("firstName:ASC");
Pageable pageable = PageRequest.of(0, 20, sort);
when(entityManager.createNativeQuery(query.toString(), javax.persistence.Tuple.class)).thenReturn(queryList);
when(queryList.getResultList()).thenReturn(tupleList);
this.mockFeedbackListDTO = feedbackServiceImpl.getFeedbackList(workflowId, categoryId, "", "",
"2019-08-29T01:00:00Z", "2019-08-29T13:00:00Z", "5", pageable, true);
assertEquals(201, this.mockFeedbackListDTO.getCode());
} catch (BusinessException | ParseException be) {
assertEquals("No feedback from users", accessor.getMessage(be.getLocalizedMessage()));
}
}

List<Tuple> tupleList = new ArrayList<>();
NativeQueryTupleTransformer nativeQueryTupleTransformer = new NativeQueryTupleTransformer();
tupleList.add((Tuple)nativeQueryTupleTransformer.transformTuple(new BigDecimal[]{new BigDecimal(123),new BigDecimal(123),new BigDecimal(123)},new String[]{"0","1","2"} ));
tupleList.add((Tuple)nativeQueryTupleTransformer.transformTuple(new BigDecimal[]{new BigDecimal(123),new BigDecimal(123),new BigDecimal(123)},new String[]{"0","1","2"} ));
tupleList.add((Tuple)nativeQueryTupleTransformer.transformTuple(new BigDecimal[]{new BigDecimal(123),new BigDecimal(123),new BigDecimal(123)},new String[]{"0","1","2"} ));
Mockito.when(service.getRecordRangeForPagination(Mockito.anyString(),Mockit.anyLong(),Mockito.anyString())).thenReturn(tupleList);

It looks like your list is empty, therefore your for-loop is never examined.
Add an assertion that the expected size of the list should be of size 3:
List<Tuple> tupleResults = queryResults.getResultList();
// Check that the list is of size 3
Assert.assertTrue(tupleResults.size() == 3);
for(Tuple t : tupleResults) {
myDtoObject.setName(t.get("name")); //0
myDtoObject.setAge(t.get("age")); //1
myDtoObject.setSalary(t.get("salary"); //2
}
#Test
public void test() {
Query query = mock(Query.class);
List<Tuple> tupleList = new ArrayList<>();
when(query.getResultList().size() > 0).thenReturn(tupleList );
}

Split XML response into pages

I want to split XML response into pages because I have too many XML items to send back. I tried this:
XML request:
<?xml version="1.0" encoding="UTF-8"?>
<reconcile>
<start_date>2018-04-08T11:02:44</start_date>
<end_date>2019-10-08T11:02:44</end_date>
<page>1</page>
</reconcile>
JAXB:
#XmlRootElement(name = "reconcile")
#XmlAccessorType(XmlAccessType.FIELD)
public class Reconcile {
#XmlElement(name = "start_date")
#XmlJavaTypeAdapter(LocalDateTimeXmlAdapter.class)
private LocalDateTime start_date;
#XmlElement(name = "end_date")
#XmlJavaTypeAdapter(LocalDateTimeXmlAdapter.class)
private LocalDateTime end_date;
#XmlElement(name = "page")
private String page;
...../// getters and setters
}
SQL query:
public List<PaymentTransactions> transactionsByDate(LocalDateTime start_date, LocalDateTime end_date, Merchants merchant, Terminals terminal) throws Exception {
String hql = "select e from " + PaymentTransactions.class.getName() + " e where e.created_at >= ? and e.created_at <= ?";
Query query = entityManager.createQuery(hql).setParameter(0, start_date).setParameter(1, end_date);
List<PaymentTransactions> paymentTransactions = (List<PaymentTransactions>) query.getResultList();
return paymentTransactions;
}
Return XML:
List<PaymentTransactions> paymentTransactions = transactionsService
.transactionsByDate(reconcile.getStart_date(), reconcile.getEnd_date(), merchant, terminal);
ReconcilePaymentResponses pr = new ReconcilePaymentResponses();
pr.setPage("1");
pr.setPages_count("10");
pr.setPer_page("4");
pr.setTotal_count(String.valueOf(paymentTransactions.size()));
for (int e = 0; e < paymentTransactions.size(); e++) {
PaymentTransactions pt = paymentTransactions.get(e);
ReconcilePaymentResponse obj = new ReconcilePaymentResponse();
obj.setTransaction_type(pt.getType());
pr.getPaymentResponse().add(obj);
}
return pr;
XML Response:
<?xml version='1.0' encoding='UTF-8'?>
<payment_responses page="1" per_page="4" total_count="5" pages_count="10">
<payment_response>
<transaction_type>Type</transaction_type>
</payment_response>
<payment_response>
<transaction_type>Type</transaction_type>
</payment_response>
<payment_response>
<transaction_type>Type</transaction_type>
</payment_response>
.........
</payment_responses>
I would like somehow to split <payment_response>....</payment_response> into pages in order to reduce memory overhead. For example when I send 1 I would like to return the first 10.
How I can implement this?

What do you think about something like this? I'm sorry it is untested code but something like this should work.
I created a new PageInfo class to store the paging info. Added a query to get the total number of rows and set my page_info. Then limited the number of results from your query. Finally set the values to ReconcilePaymentResponse.
Class PageInfo {
int current_page;
int page_count;
int per_page;
int total_page;
//constructor
public PageInfo(int current_page, int page_count, int per_page) {
//assign them
}
//getters
//setters
}
SQL Query:
public List<PaymentTransactions> transactionsByDate(LocalDateTime start_date, LocalDateTime end_date, Merchants merchant, Terminals terminal,
PageInfo pageInfo) throws Exception {
//figure out number of total rows
String count_hql = "select count(*) from " + PaymentTransactions.class.getName() + " e where e.created_at >= ? and e.created_at <= ?";
Query count_query = entityManager.createQuery(count_hql);
int count = countQuery.uniqueResult();
//figure out total pages
int total_page = (int)Math.ceil(count/(double)pageInfo.getPerPage());
pageInfo.setTotal_Page(total_page);
String hql = "select e from " + PaymentTransactions.class.getName() + " e where e.created_at >= ? and e.created_at <= ?";
Query query = entityManager.createQuery(hql)
//set starting point
.setFirstResult((pageInfo.getCurrentPage()-1) * pageInfo.getPerPage)
//set max rows to return
.setMaxResults(pageInfo.getPerPage)
.setParameter(0, start_date).setParameter(1, end_date);
List<PaymentTransactions> paymentTransactions = (List<PaymentTransactions>) query.getResultList();
return paymentTransactions;
}
Return XML:
//initialize PageInfo with desired values
PageInfo page_info = new PageInfo(1,10,4);
List<PaymentTransactions> paymentTransactions = transactionsService
.transactionsByDate(reconcile.getStart_date(), reconcile.getEnd_date(), merchant, terminal, page_info); // pass in page_info
ReconcilePaymentResponses pr = new ReconcilePaymentResponses();
pr.setPage(page_info.getCurrentPage());
pr.setPages_count(page_info.getPageCount());
pr.setPer_page(page_info.getPerPage());
pr.setTotal_count(String.valueOf(paymentTransactions.size()));
for (int e = 0; e < paymentTransactions.size(); e++) {
PaymentTransactions pt = paymentTransactions.get(e);
ReconcilePaymentResponse obj = new ReconcilePaymentResponse();
obj.setTransaction_type(pt.getType());
pr.getPaymentResponse().add(obj);
}
return pr;

Hibernate JOIN query not working: Java/JSP with Hibernate, IDE Netbeans/GlassFish, Windows 10

Why doesn't this query work?
query = "SELECT itm.itemId, itm.itemModel, itm.itemDescription, "
+ " itmImages.imageFileName, part.participant_id "
+ " FROM Users user "
+ " INNER JOIN user.participant part "
+ " INNER JOIN part.addresses addr "
+ " INNER JOIN part.item itm "
+ " INNER JOIN itm.itemImages itmImages "
+ " WHERE user.userType LIKE '%borrow%') AND itm.itemDescription LIKE '%mower%') AND addr.addressType = 'primary'";
It always returns all items, disregards itemDescription LIKE... I checked the database and all of the join ids are fine
This works:
query = "SELECT user"
+ " FROM Users user "
+ " INNER JOIN user.participant part "
+ " INNER JOIN part.addresses addr "
+ " WHERE user.userType LIKE '%borrow%') AND addr.addressType = 'primary'";
I have a table Users. It has a one-to-many association with table Participant.
In Users.java I have..
private Set<Participant> participant = new HashSet<Participant>();
with
#OneToMany
#JoinTable(name = "echomarket.hibernate.Participant")
#JoinColumn(name = "user_id")
public Set<Participant> getParticipant() {
return participant;
}
public void setParticipant(Set<Participant> participant) {
this.participant = participant;
}
This join works fine.
In Participant.java I have
private Set<Addresses> addresses = new HashSet<Addresses>();
with
#OneToMany
#JoinTable(name = "echomarket.hibernate.Addresses")
#JoinColumn(name = "participant_id")
public Set<Addresses> getAddresses() {
return addresses;
}
public void setAddresses(Set<Addresses> addresses) {
this.addresses = addresses;
}
And
private Set item = new HashSet();
With
#OneToMany
#JoinTable(name = "echomarket.hibernate.Items")
#JoinColumn(name = "participant_id")
public Set<Items> getItem() {
return item;
}
No association statement with regard to Users.
In Addresses.java I make no associations.
In Items.java I have
private Set<ItemImages> itemImages = new HashSet<ItemImages>();
with
#OneToMany
#JoinTable(name = "echomarket.hibernate.ItemImages")
#JoinColumn(name = "itemId")
public Set<ItemImages> getItemImages() {
return itemImages;
}
public void setItemImages(Set<ItemImages> itemImages) {
this.itemImages = itemImages;
}
In ItemImages.java I make no associations...
Very much thanks for your help. If you need more information, please just ask...
Liz

Couldn't get the above INNER JOIN query to work-- intended for a search that involves many tables. I tested each JOIN independently successfully, but together the JOIN does not work. Also had problems with query recognizing LIKE statement. I worked really hard to find solutions. So I rewrote with the following, data gathering is split in two query calls. The following works:
public String SearchResults() {
Session sb = null;
Transaction tx = null;
String queryString = "";
String forceString = this.found_zip_codes;
List results = null;
String fromStatement = "";
if (this.lenderOrBorrower == 2) {
this.which = "borrow";
} else {
this.which = "lend";
}
this.imageLibrary = this.which + "_images";
fromStatement = " SELECT part "
+ " FROM Participant part "
+ " INNER JOIN part.addresses addr "
+ " WHERE addr.addressType = 'primary' ";
if (ubean.getComDetailID() != null) {
fromStatement = fromStatement + " AND part.communityId = \'" + ubean.getComDetailID() + "\' ";
} else {
fromStatement = fromStatement + " AND part.communityId = ''";
}
if (this.postalCode.isEmpty() == false) {
fromStatement = fromStatement + " OR addr.postalCode LIKE \'" + this.postalCode + "%\'";
}
try {
sb = hib_session();
tx = sb.beginTransaction();
results = sb.createQuery(fromStatement).list();
tx.commit();
} catch (Exception ex) {
tx.rollback();
Logger.getLogger(SearchesBean.class.getName()).log(Level.SEVERE, null, ex);
} finally {
tx = null;
sb = null;
}
String[] pids = new String[results.size()];
String hold_pid = "";
if (results != null) {
if (results.size() > 0) {
for (int i = 0; i < results.size(); i++) {
Participant cArray = (Participant) results.get(i);
if (cArray.getParticipant_id().isEmpty() == false) {
hold_pid = "\'" + cArray.getParticipant_id() + "\'";
pids[i] = hold_pid;
}
}
hold_pid = String.join(",", pids);
}
}
results = null;
fromStatement = " FROM Items itm WHERE itm.itemType = :which "
+ (hold_pid.isEmpty() ? "" : " AND itm.participant_id IN ( " + hold_pid + " )");
if ((this.startDate.isEmpty() == false) && (this.endDate.isEmpty() == false)) {
try {
queryString = queryString + " OR ";
queryString = queryString + " ( itm.dateCreated >= \'" + this.startDate + "\' AND itm.dateCreated <= \'" + this.endDate + "\' ) ";
} catch (Exception ex) {
Logger.getLogger(SearchesBean.class.getName()).log(Level.INFO, null, ex);
}
}
forceString = this.keyword;
if (forceString.isEmpty() == false) {
queryString = queryString + " OR ";
queryString = queryString + " (itm.itemDescription like \'%" + forceString + "%\' OR itm.itemModel like \'%" + forceString + "%\')";
}
if ((this.categoryId != -2)) {
queryString = queryString + " OR";
queryString = queryString + " itm.categoryId = " + this.categoryId;
}
fromStatement = fromStatement + queryString;
try {
sb = hib_session();
tx = sb.beginTransaction();
results = sb.createQuery(fromStatement).setParameter("which", this.which).list();
tx.commit();
} catch (Exception ex) {
tx.rollback();
Logger.getLogger(SearchesBean.class.getName()).log(Level.SEVERE, null, ex);
} finally {
tx = null;
sb = null;
}
this.itemDetail = results;
return "search";
}