exceptions

README.md

 
 * The final piece remaining for us is the implementation of the ComputeResult resource.
 * Because we don’t have any domain objects that can directly help generate this resource representation, we implement two Data Transfer Objects or DTOs—OptionCount and VoteResult
-* Create a sub package of `java` named `dtos`
+* Create a sub package of `java` named `io.zipcoder.tc_spring_poll_application.dtos`
 
 
 ## Part 4.1 - Create class `OptionCount`

src/main/java/io/zipcoder/tc_spring_poll_application/controller/PollController.java

 package io.zipcoder.tc_spring_poll_application.controller;
 
 import io.zipcoder.tc_spring_poll_application.domain.Poll;
+import io.zipcoder.tc_spring_poll_application.exception.ResourceNotFoundException;
 import io.zipcoder.tc_spring_poll_application.repositories.PollRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpHeaders;
 
     @RequestMapping(value="/polls/{pollId}", method=RequestMethod.GET)
     public ResponseEntity<?> getPoll(@PathVariable Long pollId) {
+        verifyPoll(pollId);
         Poll p = pollRepository.findOne(pollId);
         return new ResponseEntity<> (p, HttpStatus.OK);
     }
     @RequestMapping(value="/polls/{pollId}", method=RequestMethod.PUT)
     public ResponseEntity<?> updatePoll(@RequestBody Poll poll, @PathVariable Long pollId) {
         // Save the entity
+        verifyPoll(pollId);
         Poll p = pollRepository.save(poll);
         return new ResponseEntity<>(HttpStatus.OK);
     }
 
     @RequestMapping(value="/polls/{pollId}", method=RequestMethod.DELETE)
     public ResponseEntity<?> deletePoll(@PathVariable Long pollId) {
+        verifyPoll(pollId);
         pollRepository.delete(pollId);
         return new ResponseEntity<>(HttpStatus.OK);
     }
+
+    public void verifyPoll(Long id){
+        if(!pollRepository.exists(id)) throw ResourceNotFoundException;
+    }
 }

src/main/java/io/zipcoder/tc_spring_poll_application/controller/VoteController.java

 import io.zipcoder.tc_spring_poll_application.domain.Vote;
 import io.zipcoder.tc_spring_poll_application.repositories.VoteRepository;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
     public Iterable<Vote> getVote(@PathVariable Long pollId) {
         return voteRepository.findVotesByPoll(pollId);
     }
-    
+
 }

src/main/java/io/zipcoder/tc_spring_poll_application/dtos/ComputeResultController.java

+package io.zipcoder.tc_spring_poll_application.dtos;
+
+import io.zipcoder.tc_spring_poll_application.domain.Vote;
+import io.zipcoder.tc_spring_poll_application.repositories.VoteRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
+
+import java.net.URI;
+import java.util.Spliterator;
+
+@RestController
+public class ComputeResultController {
+
+    private VoteRepository voteRepository;
+
+    @Autowired
+    public ComputeResultController(VoteRepository voteRepository) {
+        this.voteRepository = voteRepository;
+    }
+
+    @RequestMapping(value = "/computeresult", method = RequestMethod.GET)
+    public ResponseEntity<?> computeResult(@RequestParam Long pollId) {
+        VoteResult voteResult = new VoteResult();
+        Iterable<Vote> allVotes = voteRepository.findVotesByPoll(pollId);
+        Spliterator split = allVotes.spliterator();
+        voteResult.setTotalVotes((int)split.getExactSizeIfKnown());
+        URI newPollUri = ServletUriComponentsBuilder
+                .fromCurrentRequest()
+                .path("/{computeresult}")
+                .buildAndExpand(voteResult)
+                .toUri();
+        HttpHeaders header = new HttpHeaders();
+        header.setLocation(newPollUri);
+        //TODO: Implement algorithm to count votes
+        return new ResponseEntity<VoteResult>(voteResult, HttpStatus.OK);
+    }
+}

src/main/java/dtos/OptionCount.java → src/main/java/io/zipcoder/tc_spring_poll_application/dtos/OptionCount.java

-package dtos;
+package io.zipcoder.tc_spring_poll_application.dtos;
 
 public class OptionCount {
 

src/main/java/dtos/VoteResult.java → src/main/java/io/zipcoder/tc_spring_poll_application/dtos/VoteResult.java

-package dtos;
+package io.zipcoder.tc_spring_poll_application.dtos;
 
 import java.util.Collection;
 

src/main/java/io/zipcoder/tc_spring_poll_application/exception/ResourceNotFoundException.java

+package io.zipcoder.tc_spring_poll_application.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class ResourceNotFoundException extends RuntimeException {
+
+    public ResourceNotFoundException(){
+        super();
+    }
+
+    public ResourceNotFoundException(String message) {
+        super(message);
+    }
+
+    public ResourceNotFoundException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}