package org.djutils.data;
   
   import java.util.ArrayList;
   import java.util.Collection;
   import java.util.Collections;
   import java.util.Iterator;
   import java.util.List;
   import java.util.Map;
   
  import org.djutils.exceptions.Throw;
  
  /**
   * Table implementation that stores {@code Record}s in a {@code List}.
   * <p>
   * Copyright (c) 2020-2024 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
   * BSD-style license. See <a href="https://djutils.org/docs/current/djutils/licenses.html">DJUTILS License</a>.
   * </p>
   * @author <a href="https://github.com/averbraeck">Alexander Verbraeck</a>
   * @author <a href="https://tudelft.nl/staff/p.knoppers-1">Peter Knoppers</a>
   * @author <a href="https://dittlab.tudelft.nl">Wouter Schakel</a>
   */
  public class ListTable extends Table
  {
  
      /** Records. */
      private List<Row> rows = Collections.synchronizedList(new ArrayList<>());
  
      /**
       * Constructor.
       * @param id String; id
       * @param description String; description
       * @param columns Collection&lt;Column&lt;?&gt;&gt;; columns
       */
      public ListTable(final String id, final String description, final Collection<Column<?>> columns)
      {
          super(id, description, columns);
      }
  
      @Override
      public Iterator<Row> iterator()
      {
          return this.rows.iterator();
      }
  
      @Override
      public boolean isEmpty()
      {
          return this.rows.isEmpty();
      }
  
      /**
       * Adds a row to the table.
       * @param data Map&lt;String, Object&gt;; data with values given per column
       * @throws IllegalArgumentException when the size or data types in the data map do not comply to the columns
       */
      public void addRow(final Map<Column<?>, Object> data)
      {
          Throw.whenNull(data, "Data may not be null.");
          Throw.when(data.size() != getNumberOfColumns(), IllegalArgumentException.class,
                  "Number of data columns doesn't match number of table columns.");
          Object[] dataObjects = new Object[getNumberOfColumns()];
          for (int index = 0; index < getNumberOfColumns(); index++)
          {
              Column<?> column = getColumn(index);
              Throw.when(!data.containsKey(column), IllegalArgumentException.class, "Missing data for column %s", column.getId());
              Object value = data.get(column);
              checkValueType(column, value);
              dataObjects[index] = value;
          }
          this.rows.add(new Row(this, dataObjects));
      }
  
      /**
       * Adds a row to the table.
       * @param data Map&lt;String, Object&gt;; data with values given per column id
       * @throws IllegalArgumentException when the size or data types in the data map do not comply to the columns
       */
      public void addRowByColumnIds(final Map<String, Object> data)
      {
          Throw.whenNull(data, "Data may not be null.");
          Throw.when(data.size() != getNumberOfColumns(), IllegalArgumentException.class,
                  "Number of data columns doesn't match number of table columns.");
          Object[] dataObjects = new Object[getNumberOfColumns()];
          for (int index = 0; index < getNumberOfColumns(); index++)
          {
              Column<?> column = getColumn(index);
              Throw.when(!data.containsKey(column.getId()), IllegalArgumentException.class, "Missing data for column %s",
                      column.getId());
              Object value = data.get(column.getId());
              checkValueType(column, value);
              dataObjects[index] = value;
          }
          this.rows.add(new Row(this, dataObjects));
      }
  
      /**
       * Adds a row to the table. The order in which the elements in the array are offered should be the same as the order of the
       * columns.
       * @param data Object[]; row data
      * @throws IllegalArgumentException when the size, order or data types in the {@code Object[]} do not comply to the columns
      */
     public void addRow(final Object[] data)
     {
         Throw.whenNull(data, "Data may not be null.");
         Throw.when(data.length != getNumberOfColumns(), IllegalArgumentException.class,
                 "Number of data columns doesn't match number of table columns.");
         for (int index = 0; index < getNumberOfColumns(); index++)
         {
             checkValueType(getColumn(index), data[index]);
         }
         Object[] dataObjects = new Object[getNumberOfColumns()]; // safe copy
         System.arraycopy(data, 0, dataObjects, 0, getNumberOfColumns());
         this.rows.add(new Row(this, dataObjects));
     }
 
     /**
      * Checks whether the type of a value is suitable for a column.
      * @param column Column&lt;?&gt;; column.
      * @param value Object; value.
      */
     private void checkValueType(final Column<?> column, final Object value)
     {
         if (null != value)
         {
             Class<?> valueType = value.getClass();
             Throw.when(!column.getValueType().isAssignableFrom(valueType), IllegalArgumentException.class,
                     "Data value for column %s is not of type %s, but of type %s.", column.getId(), column.getValueType(),
                     valueType);
         }
     }
 
 }