I am using Jasper reports to create Excel file programmatically. I am using Java Data Source - a java class that implements JRDataSource interface. Up until now My Datasource returned a List of class instances that looked something like this:
public Class MyDataSource implements JRDataSource {
private Integer prop1;
private String prop2;
private String prop3;
...
// getters and setters omitted to save space
}
With this Data Source I was able to create a very nice excel table that looked:
prop1-Header prop2-Header prop3-Header...
----------------------------------------
prop1-value prop2-value prop3-value...
prop1-value prop2-value prop3-value...
...
But now MyDataSource class has additional property List<String>
public Class MyDataSource implements JRDataSource {
private Integer prop1;
private String prop2;
private String prop3;
private List<String> subvalues;
...
// getters and setters omitted to save space
}
So I need my excel to look like this
prop1-Header prop2-Header prop3-Header...
----------------------------------------
prop1-value prop2-value prop3-value...
Sub-header1 Sub-header2...
-----------------------
sub-value1 sub-value2....
....
prop1-value prop2-value prop3-value...
Sub-header1 Sub-header2...
-----------------------
sub-value1 sub-value2....
....
...
I managed to do that by concatenating The list into a single string, and it looks very similar to what I need. But I have no way of sorting and filtering on sub-value data. So, I need to actually make it as sub-list or sub-table. And this is my question - how to do this?
After searching for a while I found the solution. First of all, the is a very nice youtube video
How to fill Jasper Report Table using Collection of data in Java?
This video shows in greate detail how to pass from java code into report an additional collection besides your Datasource java class. This is done by doing something like this:
JRBeanCollectionDataSource detailBean = new JRBeanCollectionDataSource(getMySubvaluesINstancesList());
Map<String, Object> params = new HashMap<>();
params.put("DetailDataSource", detailBean);
jasperPrint = JasperFillManager.fillReport(jasperReport, params, ds);
Note the name "DetailDataSource". In your report, you will need to create a parameter with that name and declare it's type as net.sf.jasperreports.engine.data.JRBeanCollectionDataSource. After that, you build a table based on a dataset that you create based on that parameter. But this is a short description of the video referenced above.
However, that alone doesn't solve the problem yet. The remaining problem that collection passed as a parameter will only be rendered once and will not be rendered for each record of your datasource. So, what we need to do is to add our list property into our datasource class, the same way as described in the question:
public Class MyDataSource implements JRDataSource {
private Integer prop1;
private String prop2;
private String prop3;
private List<String> subvalues;
...
// getters and setters omitted to save space
}
After that in your report you will need to declare a field named "subvalues" and declare its type as java.util.List. And then change the definition of your Dataset that you created following the video referenced above. You will need to change JRDatasource expression from $P{yourParameterName} to new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{subvalues}) And bingo! your collection is part of a datasource and will be rendered for each record
Related
I have a requirement of using a java model which will have couple of attributes but some of them will have values and some of them will not have and this is not fixed. For example if it has 4 attribute 3 may have values while passing it to the controller method or it may so happen 2 of them will have values but then rest of the attributes will be null. So to handle this i choose to use Query by example of spring , but i am getting
java.lang.IllegalArgumentException : "Should not reach the end of iterator"
I am trying to fetch data from a Azure CosmosDB. Below is the code i have used
ExampleMatcher macther = ExampleMatcher.matching().withIgnoreNullValues();
Example<RequestModel> exampleQ = Example.of(new RequestModel(
req.getEmp(), // these are the attributes which can have alternatively values or can be empty
req.getBase(),
req.getSeat(),
req.getRent()
),matcher);
sampleRepo.findByEmpOrBaseOrSeatOrRent(exampleQ ); // here i am getting the exception
The Repository
public interface SampleRepo extends CosmosRepository<TableA,String>,BaseContainerRepo{
}
The container
#Container(containerName= "${container-tableA}")
public class TableA extends BaseContainer{
}
Base model class
public class BaseContainer{
#Id
private String id;
private Inetger emp;
#PartitionKey
private String key;
private String base;
private String eqp;
}
The base container repo
public interface BaseContainerRepo{
List<BaseContainer> findByEmpOrBaseOrSeatOrRent(Example<RequestModel> exampleQ);
}
Can anyone please let me know where i am doing it wrong .
I have a 1:N relationship where a Victim might have lots of EmergencyContacts.
I've created a DTO called VictimDTO and inside of it there's a List and I'm using ModelMapper to convert my DTO into an Entity.
When I get rid of the list just for testing purposes, it works fine placing this code snippet inside of the insert "POST" method in the Controller layer in Java:
VictimEntity victimEntity = modelMapper.map(victimDTO, VictimEntity.class);
But now I've placed this List inside of my VictimDTO and I'm getting an Exception when trying to use this code.
My DTO actual code is this one as it follows below:
public class VictimDTO {
private String name;
private int age;
private String email;
private String phone;
private List<ContactDTO> contactDTOList;
//getters and setters
}
How can I use ModelMapper to convert a POJO with a Collection (List) as an instance variable inside into an Entity?
Thank you for your help.
Best regards,
Lucas Abrão
I followed everything that is outlined here - https://github.com/derjust/spring-data-dynamodb/wiki/Use-Hash-Range-keys. But still no luck.
I have a DynamoDB table with a hash key and a sort key.
Here is my entity class RecentlyPlayed.class
#DynamoDBTable(tableName="some-table")
public class RecentlyPlayed {
#Id
private RecentlyPlayedId recentlyPlayedId;
// ----- Constructor methods -----
#DynamoDBHashKey(attributeName="keyA")
// Getter and setter
#DynamoDBRangeKey(attributeName="keyB")
// Getter and setter
}
Here is my key class RecentlyPlayedId.class
public class RecentlyPlayedId implements Serializable {
private static final long serialVersionUID = 1L;
private String keyA;
private String keyB;
public RecentlyPlayedId(String keyA, String keyB) {
this.keyA = keyA;
this.keyB = keyB;
}
#DynamoDBHashKey
// Getter and setter
#DynamoDBRangeKey
// Getter and setter
}
Here is my repository interface RecentlyPlayedRepository
#EnableScan
public interface RecentlyPlayedRepository extends CrudRepository<RecentlyPlayed, RecentlyPlayedId> {
List<RecentlyPlayed> findAllByKeyA(#Param("keyA") String keyA);
// Finding the entry for keyA with highest keyB
RecentlyPlayed findTop1ByKeyAOrderByKeyBDesc(#Param("keyA") String keyA);
}
I am trying to save an object like this
RecentlyPlayed rp = new RecentlyPlayed(...);
dynamoDBMapper.save(rp); // Throws that error
recentlyPlayedRepository.save(rp); // Also throws the same error
I am using Spring v2.0.1.RELEASE. The wiki in the original docs warns about this error and describes what to do to mitigate. I did exactly what they said. But still no luck.
The link to that wiki is here - https://github.com/derjust/spring-data-dynamodb/wiki/Use-Hash-Range-keys
DynamoDB only supports primitive data types, it does not know how to convert your complex field (recentlyPlayedId) into a primitive, such as a String.
To show that this is the case, you can add the annotation #DynamoDBIgnore to your recentlyPlayedId attribute like this:
#DynamoDBIgnore
private RecentlyPlayedId recentlyPlayedId;
You also need to remove the #id annotation.
Your save function will then work, but the recentlyPlayedId will not be stored in the item. If you do want to save this field, you need to use the #DynamoDBTypeConverted annotation and write a converter class. The converter class defines how to convert the complex field into a String, and then uncovert the String into the complex field.
Removing getters/setters for the #Id field fixed the problem for me. This is suggested in https://github.com/derjust/spring-data-dynamodb/wiki/Use-Hash-Range-keys
not supported; requires #DynamoDBTyped or #DynamoDBTypeConverted",
i was getting this error when i defined model class with field JsonNode,i converted it to MAP<String,String>,now it is working fine
I have this object structure, to use like Java Bean in mi jasper report,
public class Person{
private String name;
private String lastname;
private List<Job> jobs;
}
public class Job{
private String jobName;
private String companyName;
private List<Reponsability> responsabilities;
}
All class with corresponding setters and getters
When I create a list into jasper report I define the "job list" JRDataSource expression this way:
new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{jobs})
Now I want to create another list, "responsibilities list" on the "job list", the question is:
How can I define the data source to get the corresponding job to pass into the JRDataSource Expression?
I imagine something like this:
new JRBeanCollectionDataSource(${jobs}.get($index).getResponsabilities())
but I can't get it work this
I found the solution to do this:
Into the list, I created a variable called jobInstance
<field name="jobInstance" class="com.mypackage.example.Job">
<fieldDescription><![CDATA[_THIS]]></fieldDescription>
</field>
Then when I set the datasource for responsibilities list did this:
new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{jobInstance}.getResponsabilities())
References: https://community.jaspersoft.com/questions/508346/getting-current-object
I am using drools for implementing certain condtion.I don't know how to set the
arraylist of the bean in action from drools decision table.For example following is my class.
public class Dog implements Serializable{
private String id;
private List<String> names;
}
My decision table should set the list of names based on the id paseed.How to implement this?
Conditon Action
d:Dog
id ???(what needs to be done here)
1 "tom","jack","pearl"
This can be done in the usual way.
Condition Action
d:Dog d.getNames()
id addAll(Arrays.asList($param))
Match id! Add some names!
1 "tom","jack","pearl"
You'll have to import Arrays or use the full class name.
If you used Spreadsheet File (.xlsx or .xls) then you can try this:
pojo calss:
public class CategoryEntity {
private String type;
private String allAction;
private List<String> actionList; // list
// Getters and Setters
}
And Spreadsheet File like this: