https://stackoverflow.com/questions/23117547
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RussianA straight forward solution:
BeanItemContainer<State> container = new BeanItemContainer<State>(State.class);
final BeanFieldGroup<State> binder = new BeanFieldGroup<State>(State.class);
binder.setFieldFactory(new DefaultFieldGroupFieldFactory() {
@SuppressWarnings("unchecked")
@Override
public <T extends Field> T createField(Class<?> type, Class<T> fieldType) {
if (type.isAssignableFrom(Governor.class) && fieldType.isAssignableFrom(ComboBox.class)) {
return (T) new ComboBox(); // we create a ComboBox for the Governor property
}
return super.createField(type, fieldType);
}
});
final State bean = new State();
Field<?> field = null;
binder.setItemDataSource(bean);
binder.buildAndBind("State", "state");
field = binder.buildAndBind("Governor", "governor", ComboBox.class);
ComboBox cmbx = (ComboBox) field;
// We define a container data source for your Governors.
// I've taken the BeanItemContainer
cmbx.setContainerDataSource(new BeanItemContainer<Governor>(Governor.class));
// If you want to use a JPAContainer you need to translate entities to identifiers and visa versa
// cmbx.setContainerDataSource(dsGovernor);
// cmbx.setConverter(new SingleSelectConverter<Governor>(cmbx));
cmbx.setItemCaptionPropertyId("governor");
// we create two dummy Governors
Governor governorA = new Governor();
governorA.setGovernor("A");
Governor governorB = new Governor();
governorB.setGovernor("B");
// ... and add them to the container
cmbx.getContainerDataSource().addItem(governorA);
cmbx.getContainerDataSource().addItem(governorB);
// when the binder is committed the value of the ComboBox ( getValue() )is mapped to our state bean.
