ArrayBasedComboModel.java

package swingtree;

import org.jspecify.annotations.Nullable;
import sprouts.Var;

import java.util.Objects;

final class ArrayBasedComboModel<E extends @Nullable Object> extends AbstractComboModel<E>
{
    private final E[] _items;


    ArrayBasedComboModel(E[] items) {
        this(Var.ofNullable(_findCommonType( items ), null), items);
    }

    ArrayBasedComboModel(Var<E> selection, E @Nullable[] items) {
        super(selection);
        _items = Objects.requireNonNull(items);
        _selectedIndex = _indexOf(_selectedItem.orElseNull());
    }


    @Override
    public AbstractComboModel<E> withVar( Var<E> newVar ) {
        return new ArrayBasedComboModel<>(newVar, _items);
    }

    @Override protected void setAt( int index, @Nullable E element ) { _items[index] = element; }
    @Override public int getSize() { return _items.length; }
    @Override public @Nullable E getElementAt( int index ) { return _items[index]; }

}