/**
    * This file Copyright (c) 2013-2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.form.field.transformer.multi;
  
  import info.magnolia.objectfactory.Components;
  import info.magnolia.ui.api.i18n.I18NAuthoringSupport;
  import info.magnolia.ui.form.field.definition.ConfiguredFieldDefinition;
  import info.magnolia.ui.form.field.transformer.basic.BasicTransformer;
  
  import java.util.Iterator;
  import java.util.LinkedList;
  import java.util.List;
  
  import javax.inject.Inject;
  
  import com.vaadin.v7.data.Item;
  import com.vaadin.v7.data.Property;
  import com.vaadin.v7.data.util.ObjectProperty;
  import com.vaadin.v7.data.util.PropertysetItem;
  
  /**
   * Multi values properties implementation of {@link info.magnolia.ui.form.field.transformer.Transformer}.<br>
   * Store the list of values as a {@link javax.jcr.Value[]} property.<br>
   * Retrieve the {@link javax.jcr.Value[]} property value as a list.
   */
  
  public class MultiValueTransformer extends BasicTransformer<PropertysetItem> {
  
      /**
       * @deprecated since 5.4.2 - use {@link #MultiValueTransformer(Item, ConfiguredFieldDefinition, Class, I18NAuthoringSupport)} instead.
       */
      @Deprecated
      public MultiValueTransformer(Item relatedFormItem, ConfiguredFieldDefinition definition, Class<PropertysetItem> type) {
          this(relatedFormItem, definition, type, Components.getComponent(I18NAuthoringSupport.class));
      }
  
      @Inject
      public MultiValueTransformer(Item relatedFormItem, ConfiguredFieldDefinition definition, Class<PropertysetItem> type, I18NAuthoringSupport i18NAuthoringSupport) {
          super(relatedFormItem, definition, type, i18NAuthoringSupport);
      }
  
      @SuppressWarnings("rawtypes")
      @Override
      public void writeToItem(PropertysetItem newValue) {
          Property<List> property = getOrCreateProperty(List.class);
  
          List<Object> propertyValue = null;
          if (newValue != null && !newValue.getItemPropertyIds().isEmpty()) {
              propertyValue = new LinkedList<>();
              Iterator<?> it = newValue.getItemPropertyIds().iterator();
              while (it.hasNext()) {
                  propertyValue.add(newValue.getItemProperty(it.next()).getValue());
              }
          }
          property.setValue(propertyValue);
      }
  
      @SuppressWarnings("rawtypes")
      @Override
      public PropertysetItem readFromItem() {
          PropertysetItem newValues = new PropertysetItem();
          Property<List> property = getOrCreateProperty(List.class);
          if (property.getValue() != null) {
              List<?> values = property.getValue();
              int position = 0;
              for (Object o : values) {
                  newValues.addItemProperty(position, new ObjectProperty<>(o));
                  position += 1;
             }
         }
 
         return newValues;
     }
 
 }