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A reactive Java web server.

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/*
 * Copyright (c) 1998-2015 Caucho Technology -- all rights reserved
 *
 * This file is part of Baratine(TM)
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Baratine is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Baratine is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Baratine; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.v5.kelp;

import java.util.Iterator;
import java.util.function.Predicate;

import com.caucho.v5.kelp.RangeIteratorKelp.PredicateTrue;


/**
 * btree-based node
 */
public class RangeQuery implements Iterable
{
  private final TableKelp _table;
  
  private final RowCursor _min;
  private final RowCursor _max;
  
  private final Predicate _predicate;
  
  RangeQuery(TableKelp table,
             RowCursor min,
             RowCursor max,
             Predicate predicate)
  {
    _table = table;
    _min = min;
    _max = max;
    
    if (predicate == null) {
      predicate = PredicateTrue.TRUE;
    }
    
    _predicate = predicate;
  }
  
  @Override
  public Iterator iterator()
  {
    return new RangeIteratorKelp(_table, _min, _max, _predicate);
  }
  
  @Override
  public String toString()
  {
    return (getClass().getSimpleName()
            + "[" + _min + "," + _max + "]");
  }
}