parameterizing object properties

Question

Can someone show me a code efficient way to have an object property in spring mvc change based on parameters sent to it from a hyperlink?

I am modifying the spring

Answer 1

Since you asked for a non-verbose solution, you could just do this kind of semi-dirty fix.

Owner.java

@Transient
private Set<Pet> cats = new HashSet<Pet>();

[...]

// Call this from OwnerController before returning data to page.
public void parsePets() {
  for (Pet pet : getPetsInternal()) {
    if ("cat".equals(pet.getType().getName())) {
      cats.add(pet);
    }
  }
}

public getCats() {
  return cats;
}

ownerDetail.jsp

[...]
<h3>Cats</h3>
<c:forEach var="cat" items="${owner.cats}">
    <p>Name: <c:out value="${cat.name}" /></p>
</c:forEach>

<h3>All pets</h3>
[...]

OwnerController.java

/**
 * Custom handler for displaying an owner.
 *
 * @param ownerId the ID of the owner to display
 * @return a ModelMap with the model attributes for the view
 */
@RequestMapping("/owners/{ownerId}")
public ModelAndView showOwner(@PathVariable("ownerId") int ownerId) {
    ModelAndView mav = new ModelAndView("owners/ownerDetails");
    Owner owner = this.clinicService.findOwnerById(ownerId);
    owner.parsePets();
    mav.addObject(owner);
    return mav;
}