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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 java.util.HashMap;
/**
* This interface defines the attributes of a lookup table for this plugin.
* Symbols will generally be either operators (_, -, *, etc) or funtion names.
*/
public abstract class SymbolLookup {
protected HashMap stringToID = null;
protected HashMap idToString = null;
/**
* Perform lookup table specific initialization. This would typically entail loading values into
* the lookup table. It is best to optimize this process so that data is loaded statically and shared
* across all instances of the lookup table.
*/
abstract public void initialize();
/**
* Associate a symbol with a numeric value in the lookup table
* @param symbol The symbol that will act as the key in the lookup table
* @param value The value to be associated with a given symbol
*/
public void addEntry(String symbol, int id) {
Integer iObj = new Integer(id);
stringToID.put(symbol, iObj);
idToString.put(iObj, symbol);
}
/**
* Retrieve the symbol associated with a given identifier
* @param id The identfier for which we need to retieve the symbol string
* @return The string associated with this identifier in the lookup table.
*/
public String getStringFromID(int id) {
return (String)idToString.get(new Integer(id));
}
/**
* Retrieve the identifier associated with a given symbol
* @param symbol The symbol for which we need to retieve the identifier
* @throws UnsupportedFunctionException Thown when the symbol is not found in the lookup table
* @return The identifier associated with this string in the lookup table.
*/
public int getIDFromString(String symbol) throws UnsupportedFunctionException {
Integer i = (Integer)stringToID.get(symbol);
if (i == null)
throw new UnsupportedFunctionException("Token '" + symbol + "' not supported by Pocket Excel");
return ((Integer)stringToID.get(symbol)).intValue();
}
}
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