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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you 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 .
*/
package org.openoffice.xmerge.converter.xml.sxc.pexcel.records.formula;
import java.util.HashMap;
/**
* This class defines the precedence applied to each operator when performing a conversion
*/
public class PrecedenceTable {
public static final int DEFAULT_PRECEDENCE = 0;
public static final int EQNEQ_PRECEDENCE = 1; // =, <>
public static final int GTLTEQ_PRECEDENCE = 1; // >=, <=
public static final int GTLT_PRECEDENCE = 2; // >, <
public static final int ADDOP_PRECEDENCE = 4; // +, -
public static final int MULTOP_PRECEDENCE = 5; // *, /
public static final int FACTOR_PRECEDENCE = 6; // ^
public static final int CONCAT_PRECEDENCE = 6; // &
public static final int UNARY_PRECEDENCE = 7; // !, Unary +, Unary -
public static final int PAREN_PRECEDENCE = 8; // (, )
public static final int FUNCTION_PRECEDENCE = 8;
public static final int COMMA_PRECEDENCE = 8;
private static HashMap<String,Integer> map;
static {
map = new HashMap<String,Integer>();
map.put("%", new Integer(UNARY_PRECEDENCE));
map.put("+", new Integer(ADDOP_PRECEDENCE));
map.put("-", new Integer(ADDOP_PRECEDENCE));
map.put("*", new Integer(MULTOP_PRECEDENCE));
map.put("/", new Integer(MULTOP_PRECEDENCE));
map.put("(", new Integer(PAREN_PRECEDENCE));
map.put(")", new Integer(PAREN_PRECEDENCE));
map.put(",", new Integer(COMMA_PRECEDENCE));
map.put(">", new Integer(GTLT_PRECEDENCE));
map.put("<", new Integer(GTLT_PRECEDENCE));
map.put("=", new Integer(EQNEQ_PRECEDENCE));
map.put("&", new Integer(CONCAT_PRECEDENCE));
map.put("^", new Integer(FACTOR_PRECEDENCE));
map.put(">=", new Integer(GTLTEQ_PRECEDENCE));
map.put("<=", new Integer(GTLTEQ_PRECEDENCE));
map.put("<>", new Integer(EQNEQ_PRECEDENCE));
map.put("FUNCTION", new Integer(FUNCTION_PRECEDENCE));
}
/**
* Retrieve the precedence value for a given operator.
* @param op Look up the precedence for this operator
* @return an integer representing the integer value of the operator
*/
public static int getPrecedence(String op) {
Object obj = map.get(op);
if (obj == null) {
return DEFAULT_PRECEDENCE;
}
return ((Integer)obj).intValue();
}
}
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