/*
 * Reference ETL Parser for Java
 * Copyright (c) 2000-2009 Constantine A Plotnikov
 *
 * Permission is hereby granted, free of charge, to any person 
 * obtaining a copy of this software and associated documentation 
 * files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, 
 * publish, distribute, sublicense, and/or sell copies of the Software, 
 * and to permit persons to whom the Software is furnished to do so, 
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be 
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
 * SOFTWARE. 
 */
package net.sf.etl.parsers.internal.term_parser.flattened;

import java.util.HashSet;

/**
 * Level in operator set. All operators are already split in categories.
 * 
 * @author const
 */
public class OpLevel {
	/**
	 * "xf" operators.
	 */
	public final HashSet<OpDefinitionView> xf = new HashSet<OpDefinitionView>();
	/**
	 * "yf" operators.
	 */
	public final HashSet<OpDefinitionView> yf = new HashSet<OpDefinitionView>();
	/**
	 * "yfy" operators.
	 */
	public final HashSet<OpDefinitionView> yfy = new HashSet<OpDefinitionView>();
	/**
	 * "xfx" operators.
	 */
	public final HashSet<OpDefinitionView> xfx = new HashSet<OpDefinitionView>();
	/**
	 * "xfy" operators.
	 */
	public final HashSet<OpDefinitionView> xfy = new HashSet<OpDefinitionView>();
	/**
	 * "yfx" operators.
	 */
	public final HashSet<OpDefinitionView> yfx = new HashSet<OpDefinitionView>();
	/**
	 * "fx" operators.
	 */
	public final HashSet<OpDefinitionView> fx = new HashSet<OpDefinitionView>();
	/**
	 * "fy" operators.
	 */
	public final HashSet<OpDefinitionView> fy = new HashSet<OpDefinitionView>();
	/**
	 * "f" operators.
	 */
	public final HashSet<OpDefinitionView> f = new HashSet<OpDefinitionView>();
	/**
	 * priority of this level
	 */
	public int precedence = -1;
	/**
	 * next level with higher priority
	 */
	public OpLevel nextLevel;
	/**
	 * Previous level with lower priority
	 */
	public OpLevel previousLevel;
}