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handling Null pointer Exception on OwnerID

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bijomutta 2023-07-14 11:21:07 +02:00 committed by Dave Syer
parent 3a6127557d
commit 0a529015bc
1 changed files with 12 additions and 2 deletions
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14
src/main/java/org/springframework/samples/petclinic/owner/PetController.java
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@ -56,13 +56,23 @@ class PetController {
@ModelAttribute("owner") @ModelAttribute("owner")
public Owner findOwner(@PathVariable("ownerId") int ownerId) { public Owner findOwner(@PathVariable("ownerId") int ownerId) {
return this.owners.findById(ownerId);
Owner owner = this.owners.findById(ownerId);
if (owner == null) {
throw new IllegalArgumentException("Owner ID not found: " + ownerId);
}
return owner;
} }
@ModelAttribute("pet") @ModelAttribute("pet")
public Pet findPet(@PathVariable("ownerId") int ownerId, public Pet findPet(@PathVariable("ownerId") int ownerId,
@PathVariable(name = "petId", required = false) Integer petId) { @PathVariable(name = "petId", required = false) Integer petId) {
return petId == null ? new Pet() : this.owners.findById(ownerId).getPet(petId);
Owner owner = this.owners.findById(ownerId);
if (owner == null) {
throw new IllegalArgumentException("Owner ID not found: " + ownerId);
}
return petId == null ? new Pet() : owner.getPet(petId);
} }
@InitBinder("owner") @InitBinder("owner")