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prakashvb · 2/4/23

Here is my Java class I wanted write Junit test cases for this class basically this servlet will return last modified date Error i am getting Null pointer on Asset asset = assetManager.getAsset(pdfUrl);

package com.aem.geeks.core.servlets;
import javax.servlet.Servlet;
import javax.servlet.ServletException;

import com.adobe.granite.asset.api.Asset;
import com.adobe.granite.asset.api.AssetManager;


import org.apache.felix.scr.annotations.sling.SlingServlet;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ValueMap;
import org.apache.sling.api.servlets.HttpConstants;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.json.JSONException;
import org.json.JSONObject;
import org.osgi.service.component.annotations.Component;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

@Component(
        service = Servlet.class,
        property = {
                "sling.servlet.methods=" + HttpConstants.METHOD_GET,
                "sling.servlet.paths=" + "/bin/data/pdf",
        })
public class GetpdfmdfDate extends SlingAllMethodsServlet {
    private static final long serialVersionUID = 1L;
    private static final Logger LOG = LoggerFactory.getLogger(GetpdfmdfDate.class);
    @Override
    protected void doGet(final SlingHttpServletRequest req,
                         final SlingHttpServletResponse resp) throws ServletException, IOException {
        try{
            String pdfString = req.getParameter("pdfs");

            LOG.info("pdfs"+pdfString);
            String []pdfs = pdfString.split(",");
            ResourceResolver resourceResolver =req.getResourceResolver();
            List<String> lastReplicatedDates= new ArrayList<>();
            for(String pdfUrl: pdfs) {
                LOG.info("pdf--->"+pdfUrl);

                AssetManager assetManager = resourceResolver.adaptTo(AssetManager.class);
                Asset asset = assetManager.getAsset(pdfUrl);
                LOG.info("asset--->"+asset.getPath());
                ValueMap map = asset.adaptTo(ValueMap.class);
                if(map.containsKey("jcr:lastModified")) {
                    Date date = map.get("jcr:lastModified",Date.class);
                    SimpleDateFormat sdf = new SimpleDateFormat("MMMM d, yyyy");
                    LOG.info("date..."+sdf.format(date));
                    lastReplicatedDates.add(sdf.format(date)); // set last Modified date
                }else {
                    lastReplicatedDates.add("");
                }
                LOG.info(" lastReplicatedDates--->"+lastReplicatedDates.size());
            }

            //resp.setContentType("application/json");
            JSONObject json = new JSONObject();


            json.put("lastModifiedDates", lastReplicatedDates);

            resp.getWriter().write(json.toString());
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            LOG.info("Error json--->"+e.getMessage());
        }
    }
}