/*
    * Licensed to The Apereo Foundation under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional
    * information regarding copyright ownership.
    *
    *
    * The Apereo Foundation licenses this file to you under the Educational
    * Community 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://opensource.org/licenses/ecl2.txt
   *
   * 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.opencastproject.workflow.api;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.stream.Collectors;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlElement;
  import javax.xml.bind.annotation.XmlRootElement;
  import javax.xml.bind.annotation.adapters.XmlAdapter;
  
  /**
   * The search result represents a set of result items that has been compiled as a result for a search operation.
   */
  @XmlAccessorType(XmlAccessType.FIELD)
  @XmlRootElement(name = "workflows", namespace = "http://workflow.opencastproject.org")
  public class WorkflowSetImpl implements WorkflowSet {
  
    /** A list of search items. */
    @XmlElement(name = "workflow")
    private List<JaxbWorkflowInstance> resultSet = null;
  
    /**
     * A no-arg constructor needed by JAXB
     */
    public WorkflowSetImpl() {
    }
  
    public WorkflowSetImpl(List<WorkflowInstance> workflows) {
      this.resultSet = workflows.stream()
          .map(JaxbWorkflowInstance::new)
          .collect(Collectors.toList());
    }
  
  
    /**
     * {@inheritDoc}
     *
     * @see org.opencastproject.workflow.api.WorkflowSet#getItems()
     */
    @Override
    public List<WorkflowInstance> getItems() {
      if (resultSet == null) {
        return Collections.emptyList();
      }
      return resultSet.stream()
          .map(JaxbWorkflowInstance::toWorkflowInstance)
          .collect(Collectors.toList());
    }
  
    /**
     * Adds an item to the result set.
     *
     * @param item
     *          the item to add
     */
    public void addItem(WorkflowInstance item) {
      if (item == null) {
        throw new IllegalArgumentException("Parameter item cannot be null");
      }
      if (resultSet == null) {
        resultSet = new ArrayList<JaxbWorkflowInstance>();
      }
      resultSet.add(new JaxbWorkflowInstance(item));
    }
  
    /**
     * {@inheritDoc}
     *
     * @see org.opencastproject.workflow.api.WorkflowSet#size()
     */
    @Override
    public long size() {
      return resultSet != null ? resultSet.size() : 0;
    }
 
   public static class Adapter extends XmlAdapter<WorkflowSetImpl, WorkflowSet> {
     public WorkflowSetImpl marshal(WorkflowSet set) throws Exception {
       return (WorkflowSetImpl) set;
     }
 
     public WorkflowSet unmarshal(WorkflowSetImpl set) throws Exception {
       return set;
     }
   }
 
 }