Apple WebObjects 3.5 Instrukcja Użytkownika Pobierz pdf (Strona 115)

Updating Objects in the Detail Display Group

115

Talent browser, the selection should refer to a single object.

Consequently, you need to add two methods to manage the browser’s

selection: one to return a vector containing the selected Talent and one

to set the selected Talent from a vector object.

4. Add the method

talentSelection to the MovieDetails.java class as follows:

public ImmutableVector talentSelection () {

EnterpriseObject aTalent;

EnterpriseObject aMovieRole =

(EnterpriseObject)movieRoleDisplayGroup.selectedObject();

if (aMovieRole == null) {

return null;

}

aTalent = (EnterpriseObject)aMovieRole.valueForKey("talent");

if (aTalent == null) {

return null;

} else {

EnterpriseObject talentArray[] = {aTalent};

return new ImmutableVector(talentArray);

}

Because the browser expects a vector for its selections attribute, this

method packages the selected MovieRole’s

talent object in a vector. If

the selected MovieRole object is

null, talentSelection simply returns null to

indicate that the browser shouldn’t set a selection.

5. Add the method

setTalentSelection as follows:

public void setTalentSelection(ImmutableVector talentVector) {

if (talentVector.size() > 0) {

EnterpriseObject aMovieRole =

(EnterpriseObject)movieRoleDisplayGroup.selectedObject();

EnterpriseObject selectedTalent =

(EnterpriseObject)talentVector.firstElement();

aMovieRole.addObjectToBothSidesOfRelationshipWithKey(

selectedTalent,

"talent"

);

}

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Apple WebObjects 3.5 Instrukcja Użytkownika Strona 115