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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
package org.openoffice.xmerge.converter.xml.sxc.pexcel.records.formula;
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);
try {
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);
}
} catch (UnsupportedFunctionException eFn) {
Debug.log(Debug.ERROR, eFn.getMessage());
}
return t;
}
/**
* The Factory method for creating Operand Tokens
*
* @return The created <code>Token</code>
*/
public Token getOperandToken(String s, String type) {
Token t = null;
Debug.log(Debug.TRACE,"TokenFactory creating operand (" + type + ") Token : " + s);
try {
t = new Token(s, ParseToken.TOKEN_OPERAND, operandLookup.getIDFromString(type), 0);
} catch (UnsupportedFunctionException eFn) {
Debug.log(Debug.ERROR, eFn.getMessage());
}
return t;
}
}
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