/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.syncope.client.console.panels.search;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  import org.apache.commons.lang3.StringUtils;
  import org.apache.wicket.core.util.lang.PropertyResolver;
  import org.apache.wicket.model.PropertyModel;
  
  public class MapOfListModel<T> extends PropertyModel<List<T>> {
  
      private static final long serialVersionUID = -7647997536634092231L;
  
      private final String key;
  
      public MapOfListModel(final Object modelObject, final String expression, final String key) {
          super(modelObject, expression);
          this.key = key;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public List<T> getObject() {
          final String expression = propertyExpression();
          final Object target = getInnermostModelOrObject();
  
          if (target == null || StringUtils.isBlank(expression) || expression.startsWith(".")) {
              throw new IllegalArgumentException("Property expressions cannot start with a '.' character");
          }
  
          Map<String, List<T>> map = (Map<String, List<T>>) PropertyResolver.getValue(expression, target);
  
          List<T> res;
          if (map.containsKey(key)) {
              res = map.get(key);
          } else {
              res = new ArrayList<>();
              map.put(key, res);
          }
          return res;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public void setObject(final List<T> object) {
          final String expression = propertyExpression();
          final Object target = getInnermostModelOrObject();
          ((Map<String, List<T>>) PropertyResolver.getValue(expression, target)).put(key, object);
      }
  }