Fix for BOFRecord from files generated by access etc (bug #42794)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@594102 13f79535-47bb-0310-9956-ffa450edef68

src/documentation/content/xdocs/changes.xml

@@ -36,6 +36,7 @@
 
 		<!-- Don't forget to update status.xml too! -->
         <release version="3.0.2-FINAL" date="2007-??-??">
+            <action dev="POI-DEVELOPERS" type="fix">42794 - [PATCH] Fix for BOF records from things like Access</action>
             <action dev="POI-DEVELOPERS" type="fix">43648 - Fix for IntPtg and short vs int</action>
             <action dev="POI-DEVELOPERS" type="fix">43751 - [PATCH] - Fix for handling rotated text in HSSFSheet.autoSizeColumn</action>
             <action dev="POI-DEVELOPERS" type="add">Include an Excel text extractor, and put all existing text extractors under a common superclass</action>

src/documentation/content/xdocs/status.xml

@@ -33,6 +33,7 @@
 	<!-- Don't forget to update changes.xml too! -->
     <changes>
         <release version="3.0.2-FINAL" date="2007-??-??">
+            <action dev="POI-DEVELOPERS" type="fix">42794 - [PATCH] Fix for BOF records from things like Access</action>
             <action dev="POI-DEVELOPERS" type="fix">43648 - Fix for IntPtg and short vs int</action>
             <action dev="POI-DEVELOPERS" type="fix">43751 - [PATCH] - Fix for handling rotated text in HSSFSheet.autoSizeColumn</action>
             <action dev="POI-DEVELOPERS" type="add">Include an Excel text extractor, and put all existing text extractors under a common superclass</action>

src/java/org/apache/poi/hssf/record/BOFRecord.java

@@ -110,10 +110,21 @@ public class BOFRecord
     {
         field_1_version  = in.readShort();
         field_2_type     = in.readShort();
-        field_3_build    = in.readShort();
-        field_4_year     = in.readShort();
-        field_5_history  = in.readInt();
-        field_6_rversion = in.readInt();
+        
+        // Some external tools don't generate all of
+        //  the remaining fields
+        if (in.remaining() >= 2) {
+            field_3_build = in.readShort();
+        }
+        if (in.remaining() >= 2) {
+            field_4_year = in.readShort();
+        }
+        if (in.remaining() >= 4) {
+            field_5_history  = in.readInt();
+        }
+        if (in.remaining() >= 4) {
+            field_6_rversion = in.readInt();
+        }
     }
 
     /**

src/testcases/org/apache/poi/hssf/record/TestBOFRecord.java

@@ -0,0 +1,50 @@
+
+/* ====================================================================
+   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.hssf.record;
+
+import java.io.File;
+import java.io.FileInputStream;
+
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+import org.apache.poi.poifs.filesystem.POIFSFileSystem;
+
+import junit.framework.TestCase;
+
+public class TestBOFRecord extends TestCase
+{
+    private String _test_file_path;
+    private static final String _test_file_path_property = "HSSF.testdata.path";
+
+    public TestBOFRecord()
+    {
+        super();
+        _test_file_path = System.getProperty( _test_file_path_property ) +
+        	File.separator + "bug_42794.xls";
+    }
+
+    public void testBOFRecord() throws Exception {
+    	POIFSFileSystem fs = new POIFSFileSystem(
+    			new FileInputStream(_test_file_path)
+    	);
+    	
+    	// This used to throw an error before
+    	HSSFWorkbook hssf = new HSSFWorkbook(fs);
+    }
+}