Java tutorial
/** * This file is part of mycollab-web. * * mycollab-web is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * mycollab-web is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with mycollab-web. If not, see <http://www.gnu.org/licenses/>. */ package com.mycollab.vaadin.web.ui; import com.vaadin.data.Property; import com.vaadin.ui.ListSelect; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Collection; import java.util.Iterator; /** * @author MyCollab Ltd * @since 5.3.1 */ public class IntegerKeyListSelect extends ListSelect { @Override public void setValue(Object newValue) throws Property.ReadOnlyException { if (newValue != null) { Class valueCls = newValue.getClass(); ArrayList<Integer> wrappedList = new ArrayList<>(); if (Collection.class.isAssignableFrom(valueCls)) { for (Object o : ((Collection) newValue)) { try { Integer value = Integer.parseInt(o.toString()); wrappedList.add(value); } catch (Exception e) { e.printStackTrace(); } } super.setValue(wrappedList); } else if (valueCls.isArray()) { int length = Array.getLength(newValue); for (int i = 0; i < length; i++) { try { Integer value = Integer.parseInt(Array.get(newValue, i).toString()); wrappedList.add(value); } catch (Exception e) { e.printStackTrace(); } } super.setValue(wrappedList); } else { super.setValue(newValue); } } else { super.setValue(null); } } }