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/************************************************************************
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (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.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2001 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
package org.openoffice.xmerge.converter.xml.sxc.pexcel.records.formula;
import java.io.*;
import java.util.Vector;
import java.util.Enumeration;
import org.openoffice.xmerge.util.Debug;
/**
* This is the Factory class responsible for creating a <code>Token</code>.
* It has three methods for returning three different types of Tokens
* (Operator, Operand and Function).
* This utility class is used by either the <code>FormulaParser</code> or the
* <code>FormulaDecoder</code>.
*/
public class TokenFactory {
private OperatorLookup operatorLookup;
private OperandLookup operandLookup;
private FunctionLookup fl;
/**
* Default Constructor
*/
public TokenFactory() {
operatorLookup = new OperatorLookup();
operandLookup = new OperandLookup();
fl = new FunctionLookup();
}
/**
* The Factory method for creating function Tokens
*
* @return The created <code>Token</code>
*/
public Token getFunctionToken(String s, int args) {
Token t = null;
// We will have to fix this later to include fixed function tokens
// Also will need to handle errors where functions names are incorrect???
Debug.log(Debug.TRACE,"TokenFactory creating function Token : " + s);
try {
t = new Token(s, ParseToken.TOKEN_FUNCTION_VARIABLE, fl.getIDFromString(s), args);
} catch (UnsupportedFunctionException eFn) {
Debug.log(Debug.ERROR, eFn.getMessage());
}
return t;
}
/**
* The Factory method for creating operator Tokens
*
* @return The created <code>Token</code>
*/
public Token getOperatorToken(String s, int args) {
Token t = null;
Debug.log(Debug.TRACE,"TokenFactory creating operator Token : " + s);
if(args==1) {
if(s.equals("+")) {
t = new Token(s, ParseToken.TOKEN_OPERATOR, operatorLookup.getIDFromString("UNARY_PLUS"), args);
} else if (s.equals("-")) {
t = new Token(s, ParseToken.TOKEN_OPERATOR, operatorLookup.getIDFromString("UNARY_MINUS"), args);
} else {
t = new Token(s, ParseToken.TOKEN_OPERATOR, operatorLookup.getIDFromString(s), args);
}
} else {
t = new Token(s, ParseToken.TOKEN_OPERATOR, operatorLookup.getIDFromString(s), args);
}
return t;
}
/**
* The Factory method for creating Operand Tokens
*
* @return The created <code>Token</code>
*/
public Token getOperandToken(String s, String type) {
Token t;
Debug.log(Debug.TRACE,"TokenFactory creating operand Token : " + s);
t = new Token(s, ParseToken.TOKEN_OPERAND, operandLookup.getIDFromString(type), 0);
return t;
}
}
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