package com.opencsv.bean;
   
   /*
    * Copyright 2015 Bytecode Pty Ltd.
    * 
    * Licensed 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.
   */
  
  import com.opencsv.CSVReader;
  import com.opencsv.ICSVParser;
  import com.opencsv.exceptions.CsvRequiredFieldEmptyException;
  import org.apache.commons.lang3.ObjectUtils;
  
  import java.beans.IntrospectionException;
  import java.io.IOException;
  import java.lang.reflect.InvocationTargetException;
  import java.util.Iterator;
  import java.util.Locale;
  import java.util.NoSuchElementException;
  import java.util.ResourceBundle;
  
  /**
   * Converts CSV strings to objects.
   * Unlike CsvToBean it returns a single record at a time.
   *
   * @param <T> Class to convert the objects to.
   * @deprecated Use {@link CsvToBean#iterator()} instead.
   */
  @Deprecated
  public class IterableCSVToBean<T> implements Iterable<T> {
      private final MappingStrategy<T> strategy;
      private final CSVReader csvReader;
      private final CsvToBeanFilter filter;
      private boolean hasHeader;
      private Locale errorLocale = Locale.getDefault();
  
      /**
       * IterableCSVToBean constructor
       *
       * @param csvReader CSVReader.  Should not be null.
       * @param strategy  MappingStrategy used to map CSV data to the bean.  Should not be null.
       * @param filter    Optional CsvToBeanFilter used remove unwanted data from reads.
       */
      public IterableCSVToBean(CSVReader csvReader, MappingStrategy<T> strategy, CsvToBeanFilter filter) {
          this.csvReader = csvReader;
          this.strategy = strategy;
          this.filter = filter;
          this.hasHeader = false;
      }
  
      /**
       * Retrieves the MappingStrategy.
       * @return The MappingStrategy being used by the IterableCSVToBean.
       */
      protected MappingStrategy<T> getStrategy() {
          return strategy;
      }
  
      /**
       * Retrieves the CSVReader.
       * @return The CSVReader being used by the IterableCSVToBean.
       */
      protected CSVReader getCSVReader() {
          return csvReader;
      }
  
      /**
       * Retrieves the CsvToBeanFilter
       *
       * @return The CsvToBeanFilter being used by the IterableCSVToBean.
       */
      protected CsvToBeanFilter getFilter() {
          return filter;
      }
  
      /**
       * Reads and processes a single line.
       * @return Object of type T with the requested information or null if there
       *   are no more lines to process.
       * @throws IllegalAccessException Thrown if there is a failure in introspection.
       * @throws InstantiationException Thrown when getting the PropertyDescriptor for the class.
       * @throws IOException Thrown when there is an unexpected error reading the file.
       * @throws IntrospectionException Thrown if there is a failure in introspection.
       * @throws InvocationTargetException Thrown if there is a failure in introspection.
       * @throws CsvRequiredFieldEmptyException If a field is required, but the
       *   header or column position for the field is not present in the input
       */
      public T nextLine() throws IllegalAccessException, InstantiationException,
              IOException, IntrospectionException, InvocationTargetException,
             CsvRequiredFieldEmptyException {
         if (!hasHeader) {
             strategy.captureHeader(csvReader);
             hasHeader = true;
         }
         T bean = null;
         String[] line;
         do {
             line = csvReader.readNext();
         } while (line != null && (filter != null && !filter.allowLine(line)));
         if (line != null) {
             bean = strategy.populateNewBeanWithIntrospection(line);
         }
         return bean;
     }
 
     /**
      * Sets the locale to be used for error messages.
      * @param errorLocale The locale to be used for all error messages. If null,
      *   the default locale is used.
      * @since 4.0
      */
     public void setErrorLocale(Locale errorLocale) {
         this.errorLocale = ObjectUtils.defaultIfNull(errorLocale, Locale.getDefault());
     }
     
     @Override
     public Iterator<T> iterator() {
         return iterator(this);
     }
 
     private Iterator<T> iterator(final IterableCSVToBean<T> bean) {
         return new Iterator<T>() {
             private T nextBean;
 
             @Override
             public boolean hasNext() {
                 if (nextBean != null) {
                     return true;
                 }
 
                 try {
                     nextBean = bean.nextLine();
                 } catch (IllegalAccessException | InstantiationException
                         | IOException | IntrospectionException
                         | InvocationTargetException
                         | CsvRequiredFieldEmptyException e) {
                     e.printStackTrace();
                 }
 
                 return nextBean != null;
             }
 
             @Override
             public T next() {
                 if (!hasNext()) {
                     throw new NoSuchElementException();
                 }
 
                 T holder = nextBean;
                 nextBean = null;
                 return holder;
             }
 
             @Override
             public void remove() {
                 throw new UnsupportedOperationException(ResourceBundle.getBundle(ICSVParser.DEFAULT_BUNDLE_NAME, errorLocale).getString("read.only.iterator"));
             }
         };
     }
 }