| /* |
| * ==================================================================== |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * ==================================================================== |
| */ |
| |
| package org.apache.poi.examples.ss.formula; |
| |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| import org.apache.poi.ss.formula.OperationEvaluationContext; |
| import org.apache.poi.ss.formula.eval.ErrorEval; |
| import org.apache.poi.ss.formula.eval.ValueEval; |
| import org.apache.poi.ss.formula.functions.FreeRefFunction; |
| import org.apache.poi.ss.formula.udf.UDFFinder; |
| import org.apache.poi.ss.usermodel.Row; |
| import org.apache.poi.ss.usermodel.Sheet; |
| import org.apache.poi.ss.usermodel.Workbook; |
| import org.apache.poi.xssf.usermodel.XSSFWorkbook; |
| |
| /** |
| * Demonstrates how to use functions provided by third-party add-ins, e.g. Bloomberg Excel Add-in. |
| * |
| * There can be situations when you are not interested in formula evaluation, |
| * you just need to set the formula and the workbook will be evaluation by the client. |
| */ |
| public class SettingExternalFunction { |
| |
| /** |
| * wrap external functions in a plugin |
| */ |
| public static class BloombergAddIn implements UDFFinder { |
| private final Map<String, FreeRefFunction> _functionsByName; |
| |
| public BloombergAddIn() { |
| // dummy function that returns NA |
| // don't care about the implementation, we are not interested in evaluation |
| // and this method will never be called |
| FreeRefFunction NA = (args, ec) -> ErrorEval.NA; |
| _functionsByName = new HashMap<>(); |
| _functionsByName.put("BDP", NA); |
| _functionsByName.put("BDH", NA); |
| _functionsByName.put("BDS", NA); |
| } |
| |
| @Override |
| public FreeRefFunction findFunction(String name) { |
| return _functionsByName.get(name.toUpperCase(Locale.ROOT)); |
| } |
| |
| } |
| |
| public static void main( String[] args ) throws IOException { |
| |
| try (Workbook wb = new XSSFWorkbook()) { // or new HSSFWorkbook() |
| |
| // register the add-in |
| wb.addToolPack(new BloombergAddIn()); |
| |
| Sheet sheet = wb.createSheet(); |
| Row row = sheet.createRow(0); |
| row.createCell(0).setCellFormula("BDP(\"GOOG Equity\",\"CHG_PCT_YTD\")/100"); |
| row.createCell(1).setCellFormula("BDH(\"goog us equity\",\"EBIT\",\"1/1/2005\",\"12/31/2009\",\"per=cy\",\"curr=USD\") "); |
| row.createCell(2).setCellFormula("BDS(\"goog us equity\",\"top_20_holders_public_filings\") "); |
| |
| try (FileOutputStream out = new FileOutputStream("bloomberg-demo.xlsx")) { |
| wb.write(out); |
| } |
| } |
| } |
| } |