The way that HSSF and XSSF stores references to external sheets are rather different, so begin to reflect that in how we parse their formulas into Ptgs

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1611906 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/usermodel/HSSFEvaluationWorkbook.java

@@ -30,10 +30,15 @@ import org.apache.poi.ss.formula.FormulaParseException;
 import org.apache.poi.ss.formula.FormulaParsingWorkbook;
 import org.apache.poi.ss.formula.FormulaRenderingWorkbook;
 import org.apache.poi.ss.formula.FormulaType;
+import org.apache.poi.ss.formula.SheetIdentifier;
+import org.apache.poi.ss.formula.ptg.Area3DPtg;
 import org.apache.poi.ss.formula.ptg.NamePtg;
 import org.apache.poi.ss.formula.ptg.NameXPtg;
 import org.apache.poi.ss.formula.ptg.Ptg;
+import org.apache.poi.ss.formula.ptg.Ref3DPtg;
 import org.apache.poi.ss.formula.udf.UDFFinder;
+import org.apache.poi.ss.util.AreaReference;
+import org.apache.poi.ss.util.CellReference;
 import org.apache.poi.util.POILogFactory;
 import org.apache.poi.util.POILogger;
 
@@ -65,7 +70,16 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
 		return _iBook.getExternalSheetIndex(workbookName, sheetName);
 	}
 	
-	public NameXPtg getNameXPtg(String name, int sheetRefIndex) {
+	public Ptg get3DReferencePtg(CellReference cr, SheetIdentifier sheet) {
+        int extIx = getSheetExtIx(sheet);
+	    return new Ref3DPtg(cr, extIx);
+    }
+    public Ptg get3DReferencePtg(AreaReference areaRef, SheetIdentifier sheet) {
+        int extIx = getSheetExtIx(sheet);
+        return new Area3DPtg(areaRef, extIx);
+    }
+    public NameXPtg getNameXPtg(String name, SheetIdentifier sheet) {
+        int sheetRefIndex = getSheetExtIx(sheet);
         return _iBook.getNameXPtg(name, sheetRefIndex, _uBook.getUDFFinder());
 	}
 
@@ -178,6 +192,21 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
 		}
 	}
 
+    private int getSheetExtIx(SheetIdentifier sheetIden) {
+        int extIx;
+        if (sheetIden == null) {
+            extIx = -1;
+        } else {
+            String sName = sheetIden.getSheetIdentifier().getName();
+            if (sheetIden.getBookName() == null) {
+                extIx = getExternalSheetIndex(sName);
+            } else {
+                extIx = getExternalSheetIndex(sheetIden.getBookName(), sName);
+            }
+        }
+        return extIx;
+    }
+    
 	public SpreadsheetVersion getSpreadsheetVersion(){
 		return SpreadsheetVersion.EXCEL97;
 	}

src/java/org/apache/poi/ss/formula/FormulaParser.java

@@ -27,7 +27,6 @@ import org.apache.poi.ss.formula.function.FunctionMetadata;
 import org.apache.poi.ss.formula.function.FunctionMetadataRegistry;
 import org.apache.poi.ss.formula.ptg.AbstractFunctionPtg;
 import org.apache.poi.ss.formula.ptg.AddPtg;
-import org.apache.poi.ss.formula.ptg.Area3DPtg;
 import org.apache.poi.ss.formula.ptg.AreaPtg;
 import org.apache.poi.ss.formula.ptg.ArrayPtg;
 import org.apache.poi.ss.formula.ptg.AttrPtg;
@@ -58,7 +57,6 @@ import org.apache.poi.ss.formula.ptg.PercentPtg;
 import org.apache.poi.ss.formula.ptg.PowerPtg;
 import org.apache.poi.ss.formula.ptg.Ptg;
 import org.apache.poi.ss.formula.ptg.RangePtg;
-import org.apache.poi.ss.formula.ptg.Ref3DPtg;
 import org.apache.poi.ss.formula.ptg.RefPtg;
 import org.apache.poi.ss.formula.ptg.StringPtg;
 import org.apache.poi.ss.formula.ptg.SubtractPtg;
@@ -83,85 +81,8 @@ import org.apache.poi.ss.util.CellReference.NameType;
  * <p/>
  * For POI internal use only
  * <p/>
- *
- *
- *  @author Avik Sengupta <avik at apache dot org>
- *  @author Andrew C. oliver (acoliver at apache dot org)
- *  @author Eric Ladner (eladner at goldinc dot com)
- *  @author Cameron Riley (criley at ekmail.com)
- *  @author Peter M. Murray (pete at quantrix dot com)
- *  @author Pavel Krupets (pkrupets at palmtreebusiness dot com)
- *  @author Josh Micich
- *  @author David Lewis (DLewis400 at gmail dot com)
  */
 public final class FormulaParser {
-	private static final class Identifier {
-		private final String _name;
-		private final boolean _isQuoted;
-
-		public Identifier(String name, boolean isQuoted) {
-			_name = name;
-			_isQuoted = isQuoted;
-		}
-		public String getName() {
-			return _name;
-		}
-		public boolean isQuoted() {
-			return _isQuoted;
-		}
-		public String toString() {
-			StringBuffer sb = new StringBuffer(64);
-			sb.append(getClass().getName());
-			sb.append(" [");
-			if (_isQuoted) {
-				sb.append("'").append(_name).append("'");
-			} else {
-				sb.append(_name);
-			}
-			sb.append("]");
-			return sb.toString();
-		}
-	}
-	private static final class SheetIdentifier {
-
-
-		private final String _bookName;
-		private final Identifier _sheetIdentifier;
-		public SheetIdentifier(String bookName, Identifier sheetIdentifier) {
-			_bookName = bookName;
-			_sheetIdentifier = sheetIdentifier;
-		}
-		public String getBookName() {
-			return _bookName;
-		}
-		public Identifier getSheetIdentifier() {
-			return _sheetIdentifier;
-		}
-		private void asFormulaString(StringBuffer sb) {
-            if (_bookName != null) {
-                sb.append(" [").append(_sheetIdentifier.getName()).append("]");
-            }
-            if (_sheetIdentifier.isQuoted()) {
-                sb.append("'").append(_sheetIdentifier.getName()).append("'");
-            } else {
-                sb.append(_sheetIdentifier.getName());
-            }
-		}
-		public String asFormulaString() {
-		    StringBuffer sb = new StringBuffer(32);
-		    asFormulaString(sb);
-		    return sb.toString();
-		}
-		public String toString() {
-			StringBuffer sb = new StringBuffer(64);
-			sb.append(getClass().getName());
-			sb.append(" [");
-			asFormulaString(sb);
-			sb.append("]");
-			return sb.toString();
-		}
-	}
-
 	private final String _formulaString;
 	private final int _formulaLength;
 	/** points at the next character to be read (after the {@link #look} char) */
@@ -478,8 +399,7 @@ public final class FormulaParser {
                         throw new FormulaParseException("Cell reference or Named Range "
                                 + "expected after sheet name at index " + _pointer + ".");
                     }
-                    int extIx = getSheetExtIx(sheetIden);
+                    NameXPtg nameXPtg = _book.getNameXPtg(name, sheetIden);
-                    NameXPtg nameXPtg = _book.getNameXPtg(name, extIx);
                     if (nameXPtg == null) {
                         throw new FormulaParseException("Specified name '" + name +
                                 "' for sheet " + sheetIden.asFormulaString() + " not found");
@@ -663,21 +583,6 @@ public final class FormulaParser {
 		return false;
 	}
 	
-	private int getSheetExtIx(SheetIdentifier sheetIden) {
-        int extIx;
-        if (sheetIden == null) {
-            extIx = Integer.MIN_VALUE;
-        } else {
-            String sName = sheetIden.getSheetIdentifier().getName();
-            if (sheetIden.getBookName() == null) {
-                extIx = _book.getExternalSheetIndex(sName);
-            } else {
-                extIx = _book.getExternalSheetIndex(sheetIden.getBookName(), sName);
-            }
-        }
-        return extIx;
-	}
-
 	/**
 	 *
 	 * @param sheetIden may be <code>null</code>
@@ -686,15 +591,13 @@ public final class FormulaParser {
 	 */
 	private ParseNode createAreaRefParseNode(SheetIdentifier sheetIden, SimpleRangePart part1,
 			SimpleRangePart part2) throws FormulaParseException {
-		int extIx = getSheetExtIx(sheetIden);
-
 		Ptg ptg;
 		if (part2 == null) {
 			CellReference cr = part1.getCellReference();
 			if (sheetIden == null) {
 				ptg = new RefPtg(cr);
 			} else {
-				ptg = new Ref3DPtg(cr, extIx);
+				ptg = _book.get3DReferencePtg(cr, sheetIden);
 			}
 		} else {
 			AreaReference areaRef = createAreaRef(part1, part2);
@@ -702,7 +605,7 @@ public final class FormulaParser {
 			if (sheetIden == null) {
 				ptg = new AreaPtg(areaRef);
 			} else {
-				ptg = new Area3DPtg(areaRef, extIx);
+				ptg = _book.get3DReferencePtg(areaRef, sheetIden);
 			}
 		}
 		return new ParseNode(ptg);
@@ -895,7 +798,7 @@ public final class FormulaParser {
 				}
 			}
 
-			Identifier iden = new Identifier(sb.toString(), true);
+			NameIdentifier iden = new NameIdentifier(sb.toString(), true);
 			// quoted identifier - can't concatenate anything more
 			SkipWhite();
 			if (look == '!') {
@@ -916,7 +819,7 @@ public final class FormulaParser {
 			SkipWhite();
 			if (look == '!') {
 				GetChar();
-				return new SheetIdentifier(bookName, new Identifier(sb.toString(), false));
+				return new SheetIdentifier(bookName, new NameIdentifier(sb.toString(), false));
 			}
 			return null;
 		}
@@ -987,7 +890,7 @@ public final class FormulaParser {
 			}
 			EvaluationName hName = _book.getName(name, _sheetIndex);
 			if (hName == null) {
-				nameToken = _book.getNameXPtg(name, -1);
+				nameToken = _book.getNameXPtg(name, null);
 				if (nameToken == null) {
 					throw new FormulaParseException("Name '" + name
 							+ "' is completely unknown in the current workbook");

src/java/org/apache/poi/ss/formula/FormulaParsingWorkbook.java

@@ -19,6 +19,9 @@ package org.apache.poi.ss.formula;
 
 import org.apache.poi.ss.SpreadsheetVersion;
 import org.apache.poi.ss.formula.ptg.NameXPtg;
+import org.apache.poi.ss.formula.ptg.Ptg;
+import org.apache.poi.ss.util.AreaReference;
+import org.apache.poi.ss.util.CellReference;
 
 /**
  * Abstracts a workbook for the purpose of formula parsing.<br/>
@@ -33,7 +36,17 @@ public interface FormulaParsingWorkbook {
 	 */
 	EvaluationName getName(String name, int sheetIndex);
 
-	NameXPtg getNameXPtg(String name, int sheetRefIndex);
+	NameXPtg getNameXPtg(String name, SheetIdentifier sheet);
+	
+	/**
+	 * Produce the appropriate Ptg for a 3d cell reference
+	 */
+	Ptg get3DReferencePtg(CellReference cell, SheetIdentifier sheet);
+
+    /**
+     * Produce the appropriate Ptg for a 3d area reference
+     */
+    Ptg get3DReferencePtg(AreaReference area, SheetIdentifier sheet);
 
 	/**
 	 * gets the externSheet index for a sheet from this workbook

src/java/org/apache/poi/ss/formula/NameIdentifier.java

@@ -0,0 +1,46 @@
+/* ====================================================================
+   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.formula;
+
+public class NameIdentifier {
+    private final String _name;
+    private final boolean _isQuoted;
+
+    public NameIdentifier(String name, boolean isQuoted) {
+        _name = name;
+        _isQuoted = isQuoted;
+    }
+    public String getName() {
+        return _name;
+    }
+    public boolean isQuoted() {
+        return _isQuoted;
+    }
+    public String toString() {
+        StringBuffer sb = new StringBuffer(64);
+        sb.append(getClass().getName());
+        sb.append(" [");
+        if (_isQuoted) {
+            sb.append("'").append(_name).append("'");
+        } else {
+            sb.append(_name);
+        }
+        sb.append("]");
+        return sb.toString();
+    }
+}

src/java/org/apache/poi/ss/formula/SheetIdentifier.java

@@ -0,0 +1,57 @@
+/* ====================================================================
+   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.formula;
+
+public class SheetIdentifier {
+    public String _bookName;
+    public NameIdentifier _sheetIdentifier;
+
+    public SheetIdentifier(String bookName, NameIdentifier sheetIdentifier) {
+        _bookName = bookName;
+        _sheetIdentifier = sheetIdentifier;
+    }
+    public String getBookName() {
+        return _bookName;
+    }
+    public NameIdentifier getSheetIdentifier() {
+        return _sheetIdentifier;
+    }
+    private void asFormulaString(StringBuffer sb) {
+        if (_bookName != null) {
+            sb.append(" [").append(_sheetIdentifier.getName()).append("]");
+        }
+        if (_sheetIdentifier.isQuoted()) {
+            sb.append("'").append(_sheetIdentifier.getName()).append("'");
+        } else {
+            sb.append(_sheetIdentifier.getName());
+        }
+    }
+    public String asFormulaString() {
+        StringBuffer sb = new StringBuffer(32);
+        asFormulaString(sb);
+        return sb.toString();
+    }
+    public String toString() {
+        StringBuffer sb = new StringBuffer(64);
+        sb.append(getClass().getName());
+        sb.append(" [");
+        asFormulaString(sb);
+        sb.append("]");
+        return sb.toString();
+    }
+}

src/java/org/apache/poi/ss/formula/WorkbookEvaluator.java

@@ -65,6 +65,7 @@ import org.apache.poi.ss.formula.ptg.NumberPtg;
 import org.apache.poi.ss.formula.ptg.OperationPtg;
 import org.apache.poi.ss.formula.ptg.Ptg;
 import org.apache.poi.ss.formula.ptg.Ref3DPtg;
+import org.apache.poi.ss.formula.ptg.Ref3DPxg;
 import org.apache.poi.ss.formula.ptg.RefErrorPtg;
 import org.apache.poi.ss.formula.ptg.RefPtg;
 import org.apache.poi.ss.formula.ptg.StringPtg;
@@ -675,6 +676,10 @@ public final class WorkbookEvaluator {
 			Ref3DPtg rptg = (Ref3DPtg) ptg;
 			return ec.getRef3DEval(rptg.getRow(), rptg.getColumn(), rptg.getExternSheetIndex());
 		}
+		if (ptg instanceof Ref3DPxg) {
+            Ref3DPtg rptg = (Ref3DPtg) ptg;
+            // TODO Return the right eval, should be easy as we already know the sheet details
+		}
 		if (ptg instanceof Area3DPtg) {
 			Area3DPtg aptg = (Area3DPtg) ptg;
 			return ec.getArea3DEval(aptg.getFirstRow(), aptg.getFirstColumn(), aptg.getLastRow(), aptg.getLastColumn(), aptg.getExternSheetIndex());

src/java/org/apache/poi/ss/formula/ptg/Ref3DPtg.java

@@ -17,19 +17,21 @@
 
 package org.apache.poi.ss.formula.ptg;
 
-import org.apache.poi.ss.util.CellReference;
 import org.apache.poi.ss.formula.ExternSheetReferenceToken;
 import org.apache.poi.ss.formula.FormulaRenderingWorkbook;
 import org.apache.poi.ss.formula.WorkbookDependentFormula;
+import org.apache.poi.ss.util.CellReference;
 import org.apache.poi.util.LittleEndianInput;
 import org.apache.poi.util.LittleEndianOutput;
 
 /**
- * Title:        Reference 3D Ptg <P>
+ * <p>Title:        Reference 3D Ptg</p>
- * Description:  Defined a cell in extern sheet. <P>
+ * <p>Description:  Defined a cell in extern sheet.</p>
- * REFERENCE:  <P>
+ * <p>REFERENCE: </p>
- * @author Libin Roman (Vista Portal LDT. Developer)
+ * 
- * @author Jason Height (jheight at chariot dot net dot au)
+ * <p>This is HSSF only, as it matches the HSSF file format way of
+ *  referring to the sheet by an extern index. The XSSF equivalent
+ *  is {@link Ref3DPxg} 
  */
 public final class Ref3DPtg extends RefPtgBase implements WorkbookDependentFormula, ExternSheetReferenceToken {
     public final static byte sid  = 0x3a;

src/java/org/apache/poi/ss/formula/ptg/Ref3DPxg.java

@@ -0,0 +1,97 @@
+/* ====================================================================
+   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.formula.ptg;
+
+import org.apache.poi.ss.util.CellReference;
+import org.apache.poi.util.LittleEndianOutput;
+
+/**
+ * <p>Title:        XSSF 3D Reference</p>
+ * <p>Description:  Defines a cell in an external or different sheet.</p>
+ * <p>REFERENCE: </p>
+ * 
+ * <p>This is XSSF only, as it stores the sheet / book references
+ *  in String form. The HSSF equivalent using indexes is {@link Ref3DPtg}</p>
+ */
+public final class Ref3DPxg extends RefPtgBase {
+    private int externalWorkbookNumber = -1;
+    private String sheetName;
+
+    public Ref3DPxg(int externalWorkbookNumber, String sheetName, String cellref) {
+        this(externalWorkbookNumber, sheetName, new CellReference(cellref));
+    }
+    public Ref3DPxg(int externalWorkbookNumber, String sheetName, CellReference c) {
+        super(c);
+        this.externalWorkbookNumber = externalWorkbookNumber;
+        this.sheetName = sheetName;
+    }
+    
+    public Ref3DPxg(String sheetName, String cellref) {
+        this(sheetName, new CellReference(cellref));
+    }
+    public Ref3DPxg(String sheetName, CellReference c) {
+        this(-1, sheetName, c);
+    }
+
+    public String toString() {
+        StringBuffer sb = new StringBuffer();
+        sb.append(getClass().getName());
+        sb.append(" [");
+        if (externalWorkbookNumber >= 0) {
+            sb.append(" [");
+            sb.append("workbook=").append(getExternalWorkbookNumber());
+            sb.append("] ");
+        }
+        sb.append("sheet=").append(getSheetName());
+        sb.append(" ! ");
+        sb.append(formatReferenceAsString());
+        sb.append("]");
+        return sb.toString();
+    }
+    
+    public int getExternalWorkbookNumber() {
+        return externalWorkbookNumber;
+    }
+    public String getSheetName() {
+        return sheetName;
+    }
+    
+    public String format2DRefAsString() {
+        return formatReferenceAsString();
+    }
+
+    public String toFormulaString() {
+        StringBuffer sb = new StringBuffer();
+        if (externalWorkbookNumber >= 0) {
+            sb.append('[');
+            sb.append(externalWorkbookNumber);
+            sb.append(']');
+        }
+        sb.append(sheetName);
+        sb.append('!');
+        sb.append(formatReferenceAsString());
+        return sb.toString();
+    }
+    
+    public int getSize() {
+        return 1;
+    }
+    public void write(LittleEndianOutput out) {
+        throw new IllegalStateException("XSSF-only Ptg, should not be serialised");
+    }
+}

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

@@ -26,12 +26,17 @@ import org.apache.poi.ss.formula.FormulaParser;
 import org.apache.poi.ss.formula.FormulaParsingWorkbook;
 import org.apache.poi.ss.formula.FormulaRenderingWorkbook;
 import org.apache.poi.ss.formula.FormulaType;
+import org.apache.poi.ss.formula.SheetIdentifier;
 import org.apache.poi.ss.formula.functions.FreeRefFunction;
+import org.apache.poi.ss.formula.ptg.Area3DPtg;
 import org.apache.poi.ss.formula.ptg.NamePtg;
 import org.apache.poi.ss.formula.ptg.NameXPtg;
 import org.apache.poi.ss.formula.ptg.Ptg;
+import org.apache.poi.ss.formula.ptg.Ref3DPxg;
 import org.apache.poi.ss.formula.udf.IndexedUDFFinder;
 import org.apache.poi.ss.formula.udf.UDFFinder;
+import org.apache.poi.ss.util.AreaReference;
+import org.apache.poi.ss.util.CellReference;
 import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDefinedName;
 
 /**
@@ -78,6 +83,19 @@ public final class XSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
 		return convertToExternalSheetIndex(sheetIndex);
 	}
 	
+	private int resolveBookIndex(String bookName) {
+	    // Is it already in numeric form?
+	    if (bookName.startsWith("[") && bookName.endsWith("]")) {
+	        bookName = bookName.substring(1, bookName.length()-2);
+	        try {
+	            return Integer.parseInt(bookName);
+	        } catch (NumberFormatException e) {}
+	    }
+	    
+	    // Look up an External Link Table for this name
+        throw new RuntimeException("Not implemented yet"); // TODO
+	}
+
 	public EvaluationName getName(String name, int sheetIndex) {
 		for (int i = 0; i < _uBook.getNumberOfNames(); i++) {
 			XSSFName nm = _uBook.getNameAt(i);
@@ -102,7 +120,7 @@ public final class XSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
 	   throw new RuntimeException("Not implemented yet");
 	}
 
-	public NameXPtg getNameXPtg(String name, int sheetRefIndex) {
+	public NameXPtg getNameXPtg(String name, SheetIdentifier sheet) {
 	    // First, try to find it as a User Defined Function
         IndexedUDFFinder udfFinder = (IndexedUDFFinder)getUDFFinder();
         FreeRefFunction func = udfFinder.findFunction(name);
@@ -119,6 +137,20 @@ public final class XSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
             return null;
         }
 	}
+    public Ptg get3DReferencePtg(CellReference cell, SheetIdentifier sheet) {
+        String sheetName = sheet._sheetIdentifier.getName();
+        
+        if (sheet._bookName != null) {
+            int bookIndex = resolveBookIndex(sheet._bookName);
+            return new Ref3DPxg(bookIndex, sheetName, cell);
+        } else {
+            return new Ref3DPxg(sheetName, cell);
+        }
+    }
+    public Ptg get3DReferencePtg(AreaReference area, SheetIdentifier sheet) {
+        // TODO Implement properly
+        return new Area3DPtg(area, getExternalSheetIndex(sheet._sheetIdentifier.getName()));
+    }
 
     public String resolveNameXText(NameXPtg n) {
         int idx = n.getNameIndex();

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

@@ -27,7 +27,7 @@ import org.apache.poi.ss.formula.FormulaType;
 import org.apache.poi.ss.formula.ptg.FuncPtg;
 import org.apache.poi.ss.formula.ptg.IntPtg;
 import org.apache.poi.ss.formula.ptg.Ptg;
-import org.apache.poi.ss.formula.ptg.Ref3DPtg;
+import org.apache.poi.ss.formula.ptg.Ref3DPxg;
 import org.apache.poi.ss.formula.ptg.RefPtg;
 import org.apache.poi.xssf.XSSFTestDataSamples;
 import org.junit.Ignore;
@@ -106,9 +106,9 @@ public final class TestXSSFFormulaParser {
         // Reference to a single cell in a different sheet
         ptgs = parse(fpb, "Uses!A1");
         assertEquals(1, ptgs.length);
-        assertEquals(Ref3DPtg.class, ptgs[0].getClass());
+        assertEquals(Ref3DPxg.class, ptgs[0].getClass());
-        assertEquals("A1", ((Ref3DPtg)ptgs[0]).format2DRefAsString());
+        assertEquals("A1", ((Ref3DPxg)ptgs[0]).format2DRefAsString());
-        assertEquals("Uses!A1", ((Ref3DPtg)ptgs[0]).toFormulaString(fpb));
+        assertEquals("Uses!A1", ((Ref3DPxg)ptgs[0]).toFormulaString());
         
         // Reference to a sheet scoped named range from another sheet
         ptgs = parse(fpb, "Defines!NR_To_A1");