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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 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<String, Integer> stringToID = null;
protected HashMap<Integer, String> 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 id The ID number 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 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 = stringToID.get(symbol);
if (i == null)
throw new UnsupportedFunctionException("Token '" + symbol + "' not supported by Pocket Excel");
return stringToID.get(symbol).intValue();
}
}
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