src/main/java/eu/etaxonomy/cdm/vaadin/util/converter/SetToListConverter.java

   1 /**
   2 * Copyright (C) 2017 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9 package eu.etaxonomy.cdm.vaadin.util.converter;
  10
  11 import java.util.ArrayList;
  12 import java.util.HashSet;
  13 import java.util.List;
  14 import java.util.Locale;
  15 import java.util.Set;
  16
  17 import com.vaadin.data.util.converter.Converter;
  18
  19 /**
  20  * @author a.kohlbecker
  21  * @since Jun 7, 2017
  22  *
  23  */
  24 public final class SetToListConverter<V extends Object> implements Converter<List<V>, Set<V>> {
  25
  26     private static final long serialVersionUID = -4453200532452354378L;
  27
  28     Class<Set<V>> modelType = (Class<Set<V>>) new HashSet<V>(0).getClass();
  29
  30     Class<List<V>> presentationType = (Class<List<V>>) new ArrayList<V>(0).getClass();
  31
  32     @Override
  33     public Set<V> convertToModel(List<V> value, Class<? extends Set<V>> targetType, Locale locale)
  34             throws com.vaadin.data.util.converter.Converter.ConversionException {
  35         if(value != null){
  36             Set<V> set = new HashSet<>(value.size());
  37             set.addAll(value);
  38             return set;
  39         }
  40         return null;
  41     }
  42
  43     @Override
  44     public List<V> convertToPresentation(Set<V> value, Class<? extends List<V>> targetType, Locale locale)
  45             throws com.vaadin.data.util.converter.Converter.ConversionException {
  46         if(value != null){
  47             List<V> list = new ArrayList<V>(value.size());
  48             list.addAll(value);
  49             return list;
  50         }
  51         return null;
  52     }
  53
  54     @Override
  55     public Class<Set<V>> getModelType() {
  56         return modelType;
  57     }
  58
  59     @Override
  60     public Class<List<V>> getPresentationType() {
  61         return presentationType;
  62     }
  63 }