completed up to part 6

src/main/java/io/zipcoder/tc_spring_poll_application/dto/error/ErrorDetail.java

@@ -1,5 +1,8 @@
 package io.zipcoder.tc_spring_poll_application.dto.error;
 
+import java.util.List;
+import java.util.Map;
+
 public class ErrorDetail {
 
     private String title;
@@ -7,6 +10,7 @@ public class ErrorDetail {
     private String detail;
     private long timeStamp;
     private String developerMessage;
+    private Map<String, List<ValidationError>> errors;
 
     /**
      *
@@ -68,5 +72,14 @@ public class ErrorDetail {
     public void setDeveloperMessage(String developerMessage) {
         this.developerMessage = developerMessage;
     }
+
+
+    public Map<String, List<ValidationError>> getErrors() {
+        return errors;
+    }
+
+    public void setErrors(Map<String, List<ValidationError>> errors) {
+        this.errors = errors;
+    }
 }
 

src/main/java/io/zipcoder/tc_spring_poll_application/dto/error/ValidationError.java

@@ -0,0 +1,29 @@
+package io.zipcoder.tc_spring_poll_application.dto.error;
+
+import java.util.List;
+import java.util.Map;
+
+public class ValidationError {
+
+    private String code;
+    private String message;
+
+    public String getCode() {
+        return code;
+    }
+
+    public void setCode(String code) {
+        this.code = code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+}
+
+

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

@@ -1,18 +1,31 @@
 package io.zipcoder.tc_spring_poll_application.exception;
 
 import io.zipcoder.tc_spring_poll_application.dto.error.ErrorDetail;
+import io.zipcoder.tc_spring_poll_application.dto.error.ValidationError;
+import org.springframework.context.MessageSource;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 
+import javax.inject.Inject;
 import javax.servlet.http.HttpServletRequest;
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.List;
 
 @ControllerAdvice
 public class RestExceptionHandler {
+
+    @Inject
+     private MessageSource messageSource;
+
     @ExceptionHandler(ResourceNotFoundException.class)
-    public ResponseEntity<?> handleResourceNotFoundException(ResourceNotFoundException rnfe, HttpServletRequest request) {
+    public ResponseEntity<?> handleResourceNotFoundException(
+            ResourceNotFoundException rnfe,
+            HttpServletRequest request) {
         ErrorDetail customError = new ErrorDetail();
         customError.setDetail(rnfe.getMessage());
         customError.setDeveloperMessage(rnfe.getStackTrace().toString());
@@ -22,6 +35,29 @@ public class RestExceptionHandler {
 
         return new ResponseEntity<>(customError, null, HttpStatus.NOT_FOUND);
     }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<?> handleValidationError(
+            MethodArgumentNotValidException manve,
+            HttpServletRequest request){
+        ErrorDetail customError = new ErrorDetail();
+
+        List<FieldError> fieldErrors =  manve.getBindingResult().getFieldErrors();
+        for(FieldError fe : fieldErrors) {
+
+            List<ValidationError> validationErrorList = customError.getErrors().get(fe.getField());
+            if(validationErrorList == null) {
+                validationErrorList = new ArrayList<>();
+                customError.getErrors().put(fe.getField(), validationErrorList);
+            }
+            ValidationError validationError = new ValidationError();
+            validationError.setCode(fe.getCode());
+            validationError.setMessage(messageSource.getMessage(fe, null));
+            validationErrorList.add(validationError);
+        }
+
+        return new ResponseEntity<>(customError, null, HttpStatus.NOT_FOUND);
+        }
 }
 
 
@@ -31,3 +67,12 @@ public class RestExceptionHandler {
 //return a ResponseEntity containing the ErrorDetail and an HTTP NOT_FOUND status
 //Use java.util's new Date().getTime() for the timestamp
 //Provide the detail and developer messages from the ResourceNotFoundException
+
+
+//In this handler we need to do the following:
+//
+// Create the ErrorDetail object (similar to before)
+//  Get the list of field validation errors
+// For each field error, add it to the appropriate list in the ErrorDetail (see below)
+// Return a ResponseEntity containing the error detail and the appropriate HTTP status code (400 Bad Request)
+

src/main/resources/messages.properties

@@ -0,0 +1,2 @@
+NotEmpty.poll.question=Question is a required field
+Size.poll.options=Options must be greater than {2} and less than {1}