/*
    * 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.common.lib.to;
  
  import com.fasterxml.jackson.annotation.JsonIgnore;
  import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlElementWrapper;
  import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Optional;
  import org.apache.commons.lang3.builder.EqualsBuilder;
  import org.apache.commons.lang3.builder.HashCodeBuilder;
  
  public abstract class ItemContainer implements Serializable {
  
      private static final long serialVersionUID = 3637981417797873343L;
  
      private final List<Item> items = new ArrayList<>();
  
      @JsonIgnore
      public Optional<Item> getConnObjectKeyItem() {
          return getItems().stream().filter(Item::isConnObjectKey).findFirst();
      }
  
      protected boolean addConnObjectKeyItem(final Item connObjectItem) {
          connObjectItem.setMandatoryCondition("true");
          connObjectItem.setConnObjectKey(true);
  
          return add(connObjectItem);
      }
  
      public boolean setConnObjectKeyItem(final Item connObjectKeyItem) {
          return Optional.ofNullable(connObjectKeyItem).
                  map(this::addConnObjectKeyItem).
                  orElseGet(() -> getConnObjectKeyItem().map(items::remove).orElse(false));
      }
  
      @JacksonXmlElementWrapper(localName = "items")
      @JacksonXmlProperty(localName = "item")
      public List<Item> getItems() {
          return items;
      }
  
      public boolean add(final Item item) {
          return Optional.ofNullable(item).
                  filter(itemTO -> items.contains(itemTO) || items.add(itemTO)).isPresent();
      }
  
      @Override
      public boolean equals(final Object obj) {
          if (this == obj) {
              return true;
          }
          if (obj == null) {
              return false;
          }
          if (getClass() != obj.getClass()) {
              return false;
          }
          final ItemContainer other = (ItemContainer) obj;
          return new EqualsBuilder().
                  append(items, other.items).
                  build();
      }
  
      @Override
      public int hashCode() {
          return new HashCodeBuilder().
                  append(items).
                  build();
      }
  }