Fix bug #44201 - support cloning of DVRecord, so validation enabled sheets can be cloned

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@612152 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="2008-??-??">
+            <action dev="POI-DEVELOPERS" type="fix">44201 - Enable cloning of sheets with data validation rules</action>
             <action dev="POI-DEVELOPERS" type="fix">44200 - Enable cloning of sheets with notes</action>
             <action dev="POI-DEVELOPERS" type="add">43008 - Add a moveCell method to HSSFRow, and deprecate setCellNum(), which didn't update things properly</action>
             <action dev="POI-DEVELOPERS" type="fix">43058 - Support setting row grouping on files from CR IX, which lack GutsRecords</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="2008-??-??">
+            <action dev="POI-DEVELOPERS" type="fix">44201 - Enable cloning of sheets with data validation rules</action>
             <action dev="POI-DEVELOPERS" type="fix">44200 - Enable cloning of sheets with notes</action>
             <action dev="POI-DEVELOPERS" type="add">43008 - Add a moveCell method to HSSFRow, and deprecate setCellNum(), which didn't update things properly</action>
             <action dev="POI-DEVELOPERS" type="fix">43058 - Support setting row grouping on files from CR IX, which lack GutsRecords</action>

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

@@ -18,7 +18,6 @@
 
 package org.apache.poi.hssf.record;
 
-import java.io.ByteArrayInputStream;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
@@ -232,19 +231,7 @@ public abstract class AbstractEscherHolderRecord
 
     public Object clone()
     {
-    	// Do it via a re-serialise
-    	// It's a cheat, but it works...
-    	byte[] b = serialize();
-    	RecordInputStream rinp = new RecordInputStream(
-    			new ByteArrayInputStream(b)
-    	);
-    	rinp.nextRecord();
-
-    	Record[] r = RecordFactory.createRecord(rinp);
-    	if(r.length != 1) {
-    		throw new IllegalStateException("Re-serialised a record to clone it, but got " + r.length + " records back!");
-    	}
-    	return r[0];
+    	return cloneViaReserialise();
     }
 
     public void addEscherRecord(int index, EscherRecord element)

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

@@ -16,16 +16,16 @@
 
 package org.apache.poi.hssf.record;
 
+import java.io.IOException;
+import java.util.Enumeration;
+import java.util.Hashtable;
+import java.util.Stack;
+
+import org.apache.poi.hssf.record.formula.Ptg;
+import org.apache.poi.hssf.util.HSSFCellRangeAddress;
 import org.apache.poi.util.BitField;
 import org.apache.poi.util.LittleEndian;
 import org.apache.poi.util.StringUtil;
-import org.apache.poi.hssf.util.HSSFCellRangeAddress;
-import org.apache.poi.hssf.record.formula.Ptg;
-
-import java.io.IOException;
-import java.util.Stack;
-import java.util.Hashtable;
-import java.util.Enumeration;
 
 /**
  * Title:        DV Record<P>
@@ -503,6 +503,14 @@ public class DVRecord extends Record
         return this.sid;
     }
     
+    /**
+     * Clones the object. Uses serialisation, as the
+     *  contents are somewhat complex
+     */
+    public Object clone() {
+    	return cloneViaReserialise();
+    }
+
     /**@todo DVRecord = Serializare */
 
     private class StringHandler

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

@@ -19,6 +19,8 @@
 
 package org.apache.poi.hssf.record;
 
+import java.io.ByteArrayInputStream;
+
 /**
  * Title: Record
  * Description: All HSSF Records inherit from this class.  It
@@ -147,4 +149,30 @@ public abstract class Record
     public Object clone() {
       throw new RuntimeException("The class "+getClass().getName()+" needs to define a clone method");
     }
+    
+    /**
+     * Clone the current record, via a call to serialise
+     *  it, and another to create a new record from the
+     *  bytes.
+     * May only be used for classes which don't have
+     *  internal counts / ids in them. For those which
+     *  do, a full record-aware serialise is needed, which
+     *  allocates new ids / counts as needed.
+     */
+    public Record cloneViaReserialise()
+    {
+    	// Do it via a re-serialise
+    	// It's a cheat, but it works...
+    	byte[] b = serialize();
+    	RecordInputStream rinp = new RecordInputStream(
+    			new ByteArrayInputStream(b)
+    	);
+    	rinp.nextRecord();
+
+    	Record[] r = RecordFactory.createRecord(rinp);
+    	if(r.length != 1) {
+    		throw new IllegalStateException("Re-serialised a record to clone it, but got " + r.length + " records back!");
+    	}
+    	return r[0];
+    }
 }

src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java

@@ -934,6 +934,26 @@ extends TestCase {
 
     }
 
+    /**
+     * Bug 44201: Sheet not cloneable when validation added to excel cell
+     */
+    public void test44201() throws Exception {
+        FileInputStream in = new FileInputStream(new File(cwd, "44201.xls"));
+        HSSFWorkbook wb = new HSSFWorkbook(in);
+        in.close();
+
+        wb.cloneSheet(0);
+        assertTrue("No Exceptions while cloning sheet", true);
+
+        //serialize and read again
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        wb.write(out);
+        out.close();
+
+        wb = new HSSFWorkbook(new ByteArrayInputStream(out.toByteArray()));
+        assertTrue("No Exceptions while reading file", true);
+
+    }
 }