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| author | Yegor Kozlov <yegor@apache.org> | 2012-11-12 09:19:37 +0000 |
|---|---|---|
| committer | Yegor Kozlov <yegor@apache.org> | 2012-11-12 09:19:37 +0000 |
| commit | d442b8e85b90f8d2c1a53164f09087fea5f7b2b2 (patch) | |
| tree | c19e2909d05337d84ff12892f24d24179621515b /src | |
| parent | 3a1268af7f5cc9f45c6ed0b4d8dfb8ba563a07bb (diff) | |
| download | poi-d442b8e85b90f8d2c1a53164f09087fea5f7b2b2.tar.gz poi-d442b8e85b90f8d2c1a53164f09087fea5f7b2b2.zip | |
added a demo how to use functions from external APIs
git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1408205 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'src')
| -rw-r--r-- | src/examples/src/org/apache/poi/ss/examples/formula/SettingExternalFunction.java | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/examples/src/org/apache/poi/ss/examples/formula/SettingExternalFunction.java b/src/examples/src/org/apache/poi/ss/examples/formula/SettingExternalFunction.java new file mode 100644 index 0000000000..17f4e0dfa8 --- /dev/null +++ b/src/examples/src/org/apache/poi/ss/examples/formula/SettingExternalFunction.java @@ -0,0 +1,93 @@ +/*
+ * ====================================================================
+ * 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.ss.examples.formula;
+
+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;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 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.
+ *
+ * @author Yegor Kozlov
+ */
+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 = new FreeRefFunction() {
+ public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
+ return ErrorEval.NA;
+ }
+ };
+ _functionsByName = new HashMap<String, FreeRefFunction>();
+ _functionsByName.put("BDP", NA);
+ _functionsByName.put("BDH", NA);
+ _functionsByName.put("BDS", NA);
+ }
+
+ public FreeRefFunction findFunction(String name) {
+ return _functionsByName.get(name.toUpperCase());
+ }
+
+ }
+
+ public static void main( String[] args ) throws IOException {
+
+ 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\") ");
+
+ FileOutputStream out = new FileOutputStream("bloomberg-demo.xlsx");
+ wb.write(out);
+ out.close();
+
+ }
+
+}
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