How to get a specific attribute from an object list?
- by anarhikos
I've an array keeping a list of Group objects. I want to set this list to the DropDownChoice component. However I want to show the end user only the name attribute of Group objects, and then get the selected values' id attribute to add database. What to do?
private List<Group> groupTypes;
DatabaseApp db = new DatabaseApp();
groupTypes = db.getGroups();
groupDropDownChoice = new DropDownChoice("type", groupTypes);
...
...
addUserForm.add(new Button("submit"){
@Override
public void onSubmit(){
Group group = (Group) groupDropDownChoice.getModelObject();
...
...
db.addUser(group.getId(), den, name, login, email, password1);
DatabaseApp.java
public List<Group> getGroups() throws SQLException{
List<Group> groups = new ArrayList<Group>();
try {
String query = "SELECT * FROM [GROUP]";
Statement statement = db.createStatement();
ResultSet result = statement.executeQuery(query);
while(result.next()){
int id = result.getInt("ID");
String name = result.getString("NAME");
groups.add(new Group(id, name));
}
result.close();
} catch (SQLException ex) {
throw new SQLException(ex.getMessage());
}
return groups;
}
