/**
    * This file Copyright (c) 2003-2014 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.cms.gui.controlx.search;
  
  import info.magnolia.cms.gui.controlx.list.ListModelIterator;
  import info.magnolia.cms.gui.query.SearchQuery;
  
  import java.util.Collection;
  import java.util.NoSuchElementException;
  
  public class MultipleSearchListModel extends AbstractSearchableListModel {
  
      protected final AbstractSearchableListModel[] models;
      protected final String[] modelNames;
  
      public MultipleSearchListModel(AbstractSearchableListModel[] models, String[] modelNames) {
          this.models = models;
          this.modelNames = modelNames;
      }
  
      public ListModelIterator getListModel() {
          return new MultipleListIterator();
      }
  
      private class MultipleListIterator implements ListModelIterator {
  
          private ListModelIterator current, previous;
          private int pos;
  
          @Override
          public Object getValue(String name) {
              if(previous != null){
                  return previous.getValue(name);
              }
              return current.getValue(name);
          }
  
          @Override
          public Object getValueObject() {
              if(previous != null){
                  return previous.getValueObject();
              }
              return current.getValueObject();
          }
  
          @Override
          public String getId() {
              if(previous != null){
                  return previous.getId();
              }
              return current.getId();
          }
  
          @Override
          public String getGroupName() {
              if(previous != null){
                  return previous.getGroupName();
              }
              return current.getGroupName();
          }
  
          @Override
          public Object nextGroup() {
              if(previous != null){
                  return previous.nextGroup();
              }
              return current.nextGroup();
          }
 
         @Override
         public boolean hasNextInGroup() {
             if(previous != null){
                 return previous.hasNext();
             }
             return current.hasNextInGroup();
         }
 
         @Override
         public void remove() {
             current.remove();
         }
 
         @Override
         public boolean hasNext() {
             if(current == null && models.length > 0){
                 current = models[pos].getListModelIterator();
             }
             while(!current.hasNext()){
                 if(++pos < models.length){
                     previous = current;
                     current = models[pos].getListModelIterator();
                 }else{
                     return false;
                 }
             }
             return true;
         }
 
         @Override
         public Object next() {
             previous = null;
             if(current == null) {
                 throw new NoSuchElementException();
             }
             current.next();
             return getName();
         }
 
         public String getName() {
             return modelNames[pos];
         }
 
     }
 
     @Override
     public void setGroupBy(String name, String order) {
         super.setGroupBy(name, order);
         for(int i = 0; i < models.length; i++) {
             models[i].setGroupBy(name, order);
         }
     }
 
     @Override
     public void setGroupBy(String name) {
         super.setGroupBy(name);
         for(int i = 0; i < models.length; i++) {
             models[i].setGroupBy(name);
         }
     }
 
     @Override
     public void setSortBy(String name, String order) {
         super.setSortBy(name, order);
         for(int i = 0; i < models.length; i++) {
             models[i].setSortBy(name, order);
         }
     }
 
     @Override
     public void setSortBy(String name) {
         super.setSortBy(name);
         for(int i = 0; i < models.length; i++) {
             models[i].setSortBy(name);
         }
     }
 
     @Override
     public void setQuery(SearchQuery query) {
         super.setQuery(query);
         for(int i = 0; i < models.length; i++) {
             models[i].setQuery(query);
         }
     }
 
     @Override
     protected Collection getResult() throws Exception {
         throw new RuntimeException("this method should never be called since the iterator creation was overwritten");
     }
 }