Initialize a model class in a different model class | Community
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V
Vinod-N-E
Level 2
March 6, 2023
Solved

Initialize a model class in a different model class

  • March 6, 2023
  • 3 replies
  • 2818 views

Hi Community,

 

I have a query, please help me with this question.

 

I am trying to call a get method in a model class which is inside another model class, I will give a simple example below.

I hope the below example is sufficient enough to answer my Question, Thank you for the replies.

 

Class HelloWorldModelImpl:

 

@Model(adaptables = {Resource.class, SlingHttpServletRequest.class}, adapters= HelloWorldModel.class, 
resourceType = HelloWorldModelImpl.class, defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
public class HelloWorldModelImpl {

//
private EmployeeModel employeeModel;

public String getEmpID(){
return employeeModel.getEmpID();
}

public String getEmpName(){
return employeeModel.getEmpName();
}

}

 

Class EmployeeModel:

@Model(adaptables = Resource.class,defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
public class EmployeeModel{

@ValueMapValue
private String empId;

@ValueMaapValue
private String empName;

public String getEmpID(){
return empId;
}

public String getEmpName(){
return empName;
}
}

 

Thanks

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Best answer by Siva_Sogalapalli

@vinod-n-e calling ModelB class methods from ModelA, the below code works for me, please try: 

Note: Just add @Self as well

Once you've modelB object you can call methods.

@Model(adaptables = Resource.class,defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL )
public class ModelA { 
@Inject 
@Self 
private ModelB modelB; 

}

 

3 replies

arunpatidar
Community Advisor
arunpatidarCommunity Advisor
Community Advisor
March 6, 2023

I think it is straight forward,

you can inject a child resource or adapt the current resource to another model

Available injectors  : https://sling.apache.org/documentation/bundles/models.html#available-injectors-1 

 

 

@Model(adaptables = Resource.class, defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL) public class OneModel { @Self Resource resource; @Inject private LinkModel link;

 

 

Arun Patidar
    V
    Vinod-N-EAuthor
    Level 2
    March 6, 2023

    Sorry Arun, Your answer is not satisfying. 

     

    As, I am trying to understand if I could achieve something like the example I have given. As I tried something like the example I have given, the EmployeeModel class is null while accessing that model class.

      arunpatidar
      Community Advisor
      arunpatidarCommunity Advisor
      Community Advisor
      March 6, 2023

      In Sling Model, It is possible to call one sling Model from another.

      I am not sure about your content structure so can't really help with the actual code but just from concept size its is possible to inject another custom type(sling model) in sling model

      Arun Patidar
        Siva_Sogalapalli
        Community Advisor
        Siva_SogalapalliCommunity AdvisorAccepted solution
        Community Advisor
        March 6, 2023

        @vinod-n-e calling ModelB class methods from ModelA, the below code works for me, please try: 

        Note: Just add @Self as well

        Once you've modelB object you can call methods.

        @Model(adaptables = Resource.class,defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL )
        public class ModelA { 
        @Inject 
        @Self 
        private ModelB modelB; 

        }

         

          V
          Vinod-N-EAuthor
          Level 2
          March 7, 2023

          Thank you Siva for helping me out.

            krishna_sai
            Community Advisor
            krishna_saiCommunity Advisor
            Community Advisor
            March 7, 2023

            @vinod-n-e you can also try adapting resource to ModelB

            @SlingObject Resource resource ModelB modelB = resource.adaptTo(ModelB.class)


            Hope this helps,
            Krishna

              V
              Vinod-N-EAuthor
              Level 2
              March 7, 2023

              Thanks Krishna I will check this as well some other time.

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