Patch from Yaniv Kunda from bug #56274 - Fix SXSSF writing of tables when creating from a template

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1596624 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFTable.java

@@ -294,13 +294,15 @@ public class XSSFTable extends POIXMLDocumentPart {
         int firstHeaderColumn = ref.getCol();
         XSSFRow row = sheet.getRow(headerRow);
 
-        if(row != null) for(CTTableColumn col : getCTTable().getTableColumns().getTableColumnList()){
-            int colIdx = (int)col.getId() - 1 + firstHeaderColumn;
-            XSSFCell cell = row.getCell(colIdx);
+        if (row != null && row.getCTRow().validate()) {
+            int cellnum = firstHeaderColumn;
+            for (CTTableColumn col : getCTTable().getTableColumns().getTableColumnList()) {
+                XSSFCell cell = row.getCell(cellnum);
                 if (cell != null) {
                     col.setName(cell.getStringCellValue());
                 }
-        }
-
+                cellnum++;
+            }
+        }
     }
 }

src/ooxml/testcases/org/apache/poi/xssf/usermodel/AllXSSFUsermodelTests.java

@@ -50,6 +50,7 @@ import org.junit.runners.Suite;
     TestXSSFRow.class,
     TestXSSFSheet.class,
     TestXSSFSheetUpdateArrayFormulas.class,
+    TestXSSFTable.class,
     TestXSSFWorkbook.class,
     TestXSSFBorder.class,
     TestXSSFCellFill.class,

src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFTable.java

@@ -0,0 +1,73 @@
+/* ====================================================================
+   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.xssf.usermodel;
+
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.xssf.XSSFTestDataSamples;
+import org.apache.poi.xssf.streaming.SXSSFWorkbook;
+import org.junit.Test;
+import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTTable;
+import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTTableColumn;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public final class TestXSSFTable {
+
+    public TestXSSFTable() {
+    }
+
+    @Test
+    public void bug56274() throws IOException {
+        // read sample file
+        XSSFWorkbook inputWorkbook = XSSFTestDataSamples.openSampleWorkbook("56274.xlsx");
+
+        // read the original sheet header order
+        XSSFRow row = inputWorkbook.getSheetAt(0).getRow(0);
+        List<String> headers = new ArrayList<String>();
+        for (Cell cell : row) {
+            headers.add(cell.getStringCellValue());
+        }
+
+        // save the worksheet as-is using SXSSF
+        File outputFile = File.createTempFile("poi-56274", ".xlsx");
+        SXSSFWorkbook outputWorkbook = new org.apache.poi.xssf.streaming.SXSSFWorkbook(inputWorkbook);
+        outputWorkbook.write(new FileOutputStream(outputFile));
+
+        // re-read the saved file and make sure headers in the xml are in the original order
+        inputWorkbook = new org.apache.poi.xssf.usermodel.XSSFWorkbook(new FileInputStream(outputFile));
+        CTTable ctTable = inputWorkbook.getSheetAt(0).getTables().get(0).getCTTable();
+        List<CTTableColumn> ctTableColumnList = ctTable.getTableColumns().getTableColumnList();
+
+        assertEquals("number of headers in xml table should match number of header cells in worksheet",
+                headers.size(), ctTableColumnList.size());
+        for (int i = 0; i < headers.size(); i++) {
+            assertEquals("header name in xml table should match number of header cells in worksheet",
+                    headers.get(i), ctTableColumnList.get(i).getName());
+        }
+        assertTrue(outputFile.delete());
+    }
+
+}