Develop Reference

Generic DAO search with group by / unqiue

I am using hibernate-generic-dao for a searching function. Since I only need to show one of the records if they have same value on a column field. But I am not sure how to achieve this by the search / filter functions.
package com.googlecode.genericdao.search;
PersonContact domain object:
...
#Column(name = "group_key", length = 20)
public String getGroupKey() {
return groupKey;
}
#Formula(value = "(SELECT status from person_contact m " +
" WHERE m.case = case AND m.movement_id = movement_id )")
public String getActiveRecord() {
return activeRecord;
}
...
Search search = new Search();
search.addFilterNotNull("groupKey"); //groupKey is the field I want to use "group by / unqiue" with it
search.addFilterEqual("type","C");
search.addFilterCustom("{activeRecord} != 'I' ");
search.setMaxResults(limit);//for paging
search.setFirstResult(startIdx);
SearchResult<PersonContact> resultObj = PersonContactDAO.searchAndCount(search);

You should probably ask this question by opening an issue in the repository for that project here: https://github.com/vincentruan/hibernate-generic-dao
It seems though as if the project is abandoned, so unless you feel like digging into the details, you should probably try to get away from it.

Search by the combination of multiple parameters via Native Query

I'm currently working on a fetaure that will allow the system to search public services receipts by the combination of 6 parameters which can be null meaning that receipts shouldn't be filtered by this parameter: accountNumber, amountRangeMin, amountRangeMax, dateRangeMin, dateRangeMax, publicServiceId. However making a method for each combination of the parameters is not an option, I'm thinking that there must be a better way, at first my approach was as following:
On my Service I have this method:
public Map<String,Object> findPublicServiceReceiptsByParams(Integer accountNumber, BigDecimal amountRangeMin,
BigDecimal amountRangeMax, LocalDate dateRangeMin, LocalDate dateRangeMax, Integer publicServiceId) {
Map<String,Object> publicServiceReceipts = new HashMap<String,Object>();
String accountNumberFilter = !(accountNumber==null) ? accountNumber.toString() : "AccountNumberTableName";
String amountRangeMinFilter = !(amountRangeMin==null) ? amountRangeMin.toString() : "table.AmountColumnName";
String amountRangeMaxFilter = !(amountRangeMax==null) ? amountRangeMax.toString() : "table.AmountColumnName";
String dateRangeMinFilter = !(dateRangeMin==null) ? dateRangeMin.toString() : "Table.ReceiptCreationDateColumn";
String dateRangeMaxFilter = !(dateRangeMax==null) ? dateRangeMax.toString() : "Table.ReceiptCreationDateColumn";
String publicServiceIdFilter = !(publicServiceId==null) ? publicServiceId.toString() : "table.publicServiceIdColumn";
publicServiceReceipts = publicServiceReceiptRepository.findPublicServiceReceiptsByParams(accountNumberFilter,
amountRangeMinFilter, amountRangeMaxFilter, dateRangeMinFilter, dateRangeMaxFilter,
publicServiceIdFilter);
return publicServiceReceipts;
}
And then in my repository I had:
final static String FIND_PUBLIC_SERVICES_BY_ARGS = "Select (Insert whatever logic should go in here to select columns from receipts the where clause is the one that matters)"
+ " WHERE ACT.ACT_AccountNumber=:accountNumberFilter\n"
+ " AND PSE.PSE_Id=:publicServiceIdFilter\n"
+ " AND PSR.PSR_CreateDate BETWEEN :dateRangeMinFilter AND :dateRangeMaxFilter\n"
+ " AND PSR.PSR_Amount BETWEEN :amountRangeMinFilter AND :amountRangeMaxFilter\n"
+ " order by PSR.PSR_CreateDate desc";
#Query(nativeQuery = true, value = FIND_PUBLIC_SERVICES_BY_ARGS)
Map<String, Object> findPublicServiceReceiptsByParams(#Param("accountNumberFilter") String accountNumberFilter,
#Param("amountRangeMinFilter") String amountRangeMinFilter,
#Param("amountRangeMaxFilter") String amountRangeMaxFilter,
#Param("dateRangeMinFilter") String dateRangeMinFilter,
#Param("dateRangeMaxFilter") String dateRangeMaxFilter,
#Param("publicServiceIdFilter") String publicServiceIdFilter);
}
My reasoning was that if a parameter was null meant that whoever consumed the Web Service is not interested in that paramater so if that happens I set that variable as the Column Name so that it wouldn't affect in the WHERE clause and in theory make it simpler, but what I found was that It would send the names as Strings so it wouldn't be recognized as an sql statement which was the flaw in my thinking and as I said there must be another way other than writing each method for each combination, I appreciate any help :).

You should use the Criteria API, which was designed for creating dynamic queries. Named queries aren't really meant to be used in this case.
With it you can do something like this:
#PersistenceContext
EntityManager em;
List<YourEntity> method(String argument) {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<YourEntity> cq = cb.createQuery(YourEntity.class);
Root<YourEntity> root = cq.from(YourEntity.class);
List<Predicate> predicates = new ArrayList<>();
if (argument == null) {
predicates.add(cb.equal(root.get("yourAttribute"), argument);
}
// rest of your logic goes here
cq.where(predicates.toArray(new Predicate[]{}));
return em.createQuery(cq).getResultList();
}

I found a way to fix this, I did it like this (I'm going to show only the native Query since it's the inly thing that i changed):
DECLARE #actNum varchar(50),#crdNum varchar(50),#pseId varchar(50),#dateMin varchar(50),#dateMax varchar(50),#amountMin varchar(50),#amountMax varchar(50)
SET #actNum = :actNum
SET #crdNum = :crdNum
SET #pseId = :pseId
SET #dateMin = :dateMin
SET #dateMax = :dateMax
SET #amountMin = :amountMin
SET #amountMax = :amountMax
--Whatever Select with joins statement
WHERE ACT.ACT_AccountNumber = CASE WHEN #actNum = 'N/A'
THEN ACT.ACT_AccountNumber
ELSE #actNum END
AND CRD_CardNumber = CASE WHEN #crdNum = 'N/A'
THEN CRD_CardNumber
ELSE #crdNum END
AND PSE.PSE_Id= CASE WHEN #pseId = 'N/A'
THEN PSE.PSE_Id
ELSE #pseId END
AND PSR.PSR_CreateDate >= CASE WHEN #dateMin = 'N/A'
THEN PSR.PSR_CreateDate
ELSE #dateMin END
AND PSR.PSR_CreateDate <= CASE WHEN #dateMax = 'N/A'
THEN PSR.PSR_CreateDate
ELSE #dateMax END
AND PSR.PSR_Amount BETWEEN CASE WHEN #amountMin = 'N/A'
THEN PSR.PSR_Amount
ELSE #amountMin END
AND CASE WHEN #amountMax = 'N/A'
THEN PSR.PSR_Amount
ELSE #amountMax END
ORDER BY PSR.PSR_CreateDate DESC
The backend will send the parameters as either "N/A" (if it shouldn't be used to filter data) or the actual value, this worked fine for me!

Setting Parameters through url javaplay

so as part of some work I've been doing I was given a file with WebServices that are being used in a Swift application. I have zero familiarity with WebServices and only know Java through syntax understanding. I need to call one of these gets with a parameter from the swift application. What I'm trying to figure out first and foremost is how I can call one of these webservices with a parameter from the URL it's associated with. For example down below I want to call the method
http://localhost:9000/ListVehicleByPlateNumber
and I want to specify the parameter through the URL say something like
http://localhost:9000/ListVehicleByPlateNumber?para="123"
But this doesn't assign any value to the parameter and I'm not getting results. If I hardcode so that the string used in the function is = "123" it gives me the results I'm looking for. I just need to know how I can pass this parameter through the url, syntax-wise.
Routes file
GET /ListVehicleByPlateNumber controllers.NewVehicle.listVehicleByPlateNumber(para: String ?="")
Controller
public Result listVehicleByPlateNumber(String para){
NewVehicleModel v = new NewVehicleModel();
List<NewVehicleModel> vehiclesC = v.searchByPlateVehicle(para);
ObjectNode wrapper = Json.newObject();
ObjectNode msg = Json.newObject();
if(vehiclesC != null) {
msg.set("VehicleList", toJson(vehiclesC));
wrapper.set("success", msg);
return ok(wrapper);
}else{
msg.put("error", "There are no vehicles with the plate number");
wrapper.set("error", msg);
return badRequest(wrapper);
}
}
Where it's called
public List<NewVehicleModel> searchByPlateVehicle(String plateNumber){
Transaction t = Ebean.beginTransaction();
List<NewVehicleModel> vehicles = new ArrayList<>();
try {
String sql = "SELECT V.idNewVehicle, V.VehicleType,V.PlateNumber,V.VehicleJurisdiction,V.State,V.Vin,V.Year, " +
"V.Make,V.modelos,V.RegistrationNumber,V.InsuranceCompany,V.PurchaseDate,V.ExpirationDate,V.idPersonaFK " +
"FROM NewVehicle V " +
"WHERE V.PlateNumber = :plateNumber";
RawSql rawSql = RawSqlBuilder.parse(sql)
.columnMapping("V.idNewVehicle", "idNewVehicle")
.columnMapping("V.State", "state")
.columnMapping("V.VehicleType", "vehicleType")
.columnMapping("V.PlateNumber", "plateNumber")
.columnMapping("V.VehicleJurisdiction", "vehicleJurisdiction")
.columnMapping("V.Vin", "vin")
.columnMapping("V.Year", "year")
.columnMapping("V.Make", "make")
.columnMapping("V.modelos", "modelos")
.columnMapping("V.RegistrationNumber", "registrationNumber")
.columnMapping("V.InsuranceCompany", "insuranceCompany")
.columnMapping("V.PurchaseDate", "purchaseDate")
.columnMapping("V.ExpirationDate", "expirationDate")
.columnMapping("V.idPersonaFK", "idPersonaFK")
.create();
Query<NewVehicleModel> query = Ebean.find(NewVehicleModel.class);
query.setRawSql(rawSql)
.setParameter("plateNumber", plateNumber);
vehicles = query.findList();
t.commit();
}
catch (Exception e){
System.out.println(e.getMessage());
}finally {
t.end();
}
return vehicles;
}

Found my own answer. I ended up casting from Integer to String here's how it looks in routes
GET /ListVehicleByPlateNumber/:para controllers.NewVehicle.listVehicleByPlateNumber(para: Integer )
Controller
public Result listVehicleByPlateNumber(int para){
String p = String.valueOf(para);
URI Format for value 123 example.
http://localhost:9000/ListVehicleByPlateNumber/123

Group values from a parameter list in a loop according to the prefix of the parameter

I am fetching a param list from my jsp which I need to identify according to the prefix so that I can set the values in my entity class.
The parameter names looks like the below:
List<String> reqParamNames = Arrays.asList("1_component_role", "2_component_role", "3_component_role",
"4_component_role", "1_survey_wt", "2_survey_wt", "3_survey_wt", "4_survey_wt", "1dynaGroup1", "1component_role1", "1wt1", "2dynaGroup1", "2component_role1", "2wt1", "3dynaGroup1",
"3component_role1", "3wt1", "4dynaGroup1", "4component_role1", "4wt1");
Now, from the above list, I need to get the param according to the prefix, i.e.1,2,3,4 etc. Once grouped correctly, I would need to set it to my Entity class so that I can save the parameters in my table using Hibernate.
I am unable to set the values for the dynamic table.
#RequestMapping(value = { "dynamicSettings/persist" }, method = RequestMethod.POST)
public String saveComponents(HttpServletRequest request, HttpServletResponse response,
Model model) {
LOG.debug("Entering persist area :: ");
Locale locale = LocaleUtil.getLocale();
// ToDo: validation for form
//For dynamic tables
List<String> reqParamNames = (List<String>) Collections.list((Enumeration<String>)request.getParameterNames());
for(int i =0; i < reqParamNames.size(); i++){
System.out.println("Param names are {} ::"+ reqParamNames.get(i));
String paramName = reqParamNames.get(i);
Matcher m = Pattern.compile("[^0-9]*([0-9]+).*").matcher(paramName);
if (m.matches()) {
System.out.println("Number ::" +m.group(1)); // Need to comment/remove this post development
}
System.out.println("ParamNumber ::" +""+m.group(1));
String attributeValue = request.getParameter(paramName);
System.out.println("Param Name ::"+paramName+"::: Attribute value ::"+attributeValue);
DynamicComponentSettings dynamicSettings = new DynamicComponentSettings();
if( i == paramNumber){
String group_type = request.getParameter("groupType"+i);
String component_role = request.getParameter("component_role"+i);
String survey_weight = request.getParameter("wt"+i);
System.out.println("Group Type ::"+group_type+ "::Component Role::" +component_role+ "::Survey Weight::"+survey_weight);
if(!StringUtils.isEmpty(group_type) && StringUtils.isEmpty(component_role)&&!StringUtils.isEmpty(survey_weight)){
Double survey_wt = Double.parseDouble(survey_weight);
dynamicSettings.setSurvey_wt(survey_wt);
dynamicSettings.setGroup_type(group_type);
dynamicSettings.setComponent_role(component_role);
}
}
dynamicComponentService.saveDynamicComponents(dynamicSettings);
}
**//For concrete table**
List<DynamicComponentSettings> resultList = dynamicComponentService.loadAllDynamicComponents();
for(DynamicComponentSettings component : resultList)
{
String _survey_wt = request.getParameter(component.getPk1().toString() + "survey_wt");
String _groupRoleType = request.getParameter(component.getPk1().toString() + "group_type");
String _componentRole = request.getParameter(component.getPk1().toString() + "component_role");
if(!StringUtils.isEmpty(_survey_wt) && StringUtils.isEmpty(_groupRoleType)&&!StringUtils.isEmpty(_componentRole)){
Double survey_wt = Double.parseDouble(_survey_wt);
component.setSurvey_wt(survey_wt);
component.setGroup_type(_groupRoleType);
component.setComponent_role(_componentRole);
}
dynamicComponentService.saveDynamicComponents(component);
}
return "redirect:" + "some url";
}
The concrete table works correctly, i.e. saving values correctly.
Entity class
<package declaration>
<imports>
#Entity
#Table(name = "dynamic_components")
public class DynamicComponentSettings {
/** The pk1. */
#Id
#SequenceGenerator(name = "dynamic_components_seq", sequenceName = "dynamic_components_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.AUTO, generator = "dynamic_components_seq")
private Long pk1;
private String group_type;
private String component_role;
private Double survey_wt;
<getters and setters>
}
Please provide your inputs and provide guidance as how to save the dynamic table values.

I managed to figure out the problems and fix it. There are multiple problems in that code sample. For eg. the loops are incorrect, the approach to match with the main loop was horribly wrong.
I had to get the prefix and suffix for each item, loop correctly[i.e. first get the suffix and prefix of the table and then based on suffix match, iterate through the prefix like rows] and put each dynamic table data with suffix being the key and prefix+data+suffix being the values into a Map containing linked lists. After that, I had to loop again through the Map containing the lists to set the values to my entity class correctly.
Please pardon me for not posting the code again as the method is quite long and may not be of much help. In any case, if someone does want to see how this was solved, please let me know.
Thanks for your time.

Getting the metadata of columns from SOQL Query

I have a simple SOQL query in java for extracting Salesforce standard object as follows -
String soqlQuery = "SELECT FirstName, LastName FROM Contact";
QueryResult qr = connection.query(soqlQuery);
I want to get the datatype of the object fields.

I have written a small function below which will provide the list of Phone fields and its label present in a Custom or Standard Object of your Salesforce ORG. I hope this might help you in writing the business logic for your code.
public list<String> getFieldsForSelectedObject(){
selectedPhoneNumber = ''; //to reset home number field
list<String> fieldsName = new list<String>();
selectedObject = 'Object Name' // This should have the object name for which we want to get the fields type
schemaMap = Schema.getGlobalDescribe(); //Populating the schema map
try{
if(selectedObject != null || selectedObject != '' || selectedObject != '--Select Object--'){
Map<String, Schema.SObjectField> fieldMap = schemaMap.get(selectedObject).getDescribe().fields.getMap();
for(Schema.SObjectField sfield : fieldMap.Values()){
schema.describefieldresult dfield = sfield.getDescribe();
schema.Displaytype disfield= dfield.getType();
system.debug('#######' + dfield );
if(dfield.getType() == Schema.displayType.Phone){// Over here I am trying to findout all the PHONE Type fields in the object(Both Custom/Standard)
fieldsName.add('Name:'+dfield.getName() +' Label:'+ dfield.getLabel ());
}
}
}
}catch(Exception ex){
apexPages.addMessage(new ApexPages.message(ApexPages.severity.ERROR,'There is no Phone or Fax Field Exist for selected Object!'));
}
return fieldsName;
}
Sample OUTPUT List of String::
Name: Home_Phone__c Label: Home Phone
Name: Office_Phone__c Label: Office Phone

Say that we have the below soql.
select FirstName,LastName from Contact limit 2
The query result in the QueryResult object looks like below.
{
[2]XmlObject
{
name={urn:partner.soap.sforce.com}records, value=null, children=
[
XmlObject{name={urn:sobject.partner.soap.sforce.com}type, value=Contact, children=[]},
XmlObject{name={urn:sobject.partner.soap.sforce.com}Id, value=null, children=[]},
XmlObject{name={urn:sobject.partner.soap.sforce.com}FirstName, value=Bill, children=[]},
XmlObject{name={urn:sobject.partner.soap.sforce.com}LastName, value=Gates, children=[]}
]
},
XmlObject
{
name={urn:partner.soap.sforce.com}records, value=null, children=
[
XmlObject{name={urn:sobject.partner.soap.sforce.com}type, value=Contact, children=[]},
XmlObject{name={urn:sobject.partner.soap.sforce.com}Id, value=null, children=[]},
XmlObject{name={urn:sobject.partner.soap.sforce.com}FirstName, value=Alan, children=[]},
XmlObject{name={urn:sobject.partner.soap.sforce.com}LastName, value=Donald, children=[]}
]
},
}
In order to parse the QueryResult and to take column names, I have implemented the below method that will return the column names in comma separated String. I have mentioned the logic inside the code.
public String getColumnNames(QueryResult soqlResponse)
{
String columns = ""
try
{
// We are looping inorder to pick the 1st record from the QueryResult
for (SObject record : soqlResponse.getRecords())
{
Iterator<XmlObject> xmlList = record.getChildren();
int counterXml = 0;
while(xmlList.hasNext())
{
XmlObject xObj = xmlList.next();
// Since the 1st 2 nodes contains metadata of some other information, we are starting from the 3rd node only
if(counterXml > 1)
{
columns += xObj.getName().getLocalPart() + ",";
}
counterXml++;
}
// Since we can get the column names from the 1st record, we are breaking the loop after the data of 1st record is read
break;
}
// We are removing the last comma in the string
columns = columns.substring(0, columns.length() - 1);
}
catch(Exception ex)
{
}
return columns;
}