Getting error while accessing current resource

Hi Everyone,

I am trying to create a multifield dialog using sling model but while accessing the values, my code is failing to get current resource. My code is failing inside try block , i am getting null value of current resource. Please help me to understand and resolve this issue.

package com.site.myproj.core.models.impl;

import com.site.myproj.core.models.MultifieldAccordionFAQModel;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.models.annotations.Default;
import org.apache.sling.models.annotations.DefaultInjectionStrategy;
import org.apache.sling.models.annotations.Model;
import org.apache.sling.models.annotations.injectorspecific.ValueMapValue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.inject.Inject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Model(
      adaptables = SlingHttpServletRequest.class,
      adapters = MultifieldAccordionFAQModel.class,
      defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL
)

public class MultifieldAccordionFAQModelImpl implements MultifieldAccordionFAQModel {

    private static final Logger LOG = LoggerFactory.getLogger(MultifieldAccordionFAQModelImpl.class);

    @Inject
    Resource componentResource;

    @ValueMapValue
    @Default( values = "FAQ's Default")
    private String accordionHeading;

    @Override
    public String getAccordionHeading() {
        return accordionHeading;
    }


    @Override
    public List<Map<String, String>> getAccordionDetails() {

        List<Map<String,String>> accordionDetailsMap = new ArrayList<>();
        try{
            LOG.debug("Component Resource>> {}", componentResource);
            Resource accordionParentNode = componentResource.getChild("accordionDetails");
            LOG.debug("accordionParentNode >> {}", accordionParentNode);
            if(accordionParentNode != null){
                for( Resource accordion : accordionParentNode.getChildren()){

                    Map<String, String> accordionsMap = new HashMap<>();

                    accordionsMap.put("accordionTitle",accordion.getValueMap().get("accordionTitle", String.class));
                    accordionsMap.put("accordionDescription",accordion.getValueMap().get("accordionDescription", String.class));

                    accordionDetailsMap.add(accordionsMap);
                }
            }
        }catch ( Exception e){
            LOG.debug("<< Error occured during MultifieldAccordionModelImpl Implementation >> {}", e.getMessage());
        }

        return accordionDetailsMap;
    }
}