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package org.apache.poi.ss.formula;
import org.apache.poi.ss.formula.ptg.Area3DPtg;
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.eval.*;
import org.apache.poi.ss.formula.functions.FreeRefFunction;
import org.apache.poi.ss.SpreadsheetVersion;
import org.apache.poi.ss.formula.CollaboratingWorkbooksEnvironment.WorkbookNotFoundException;
import org.apache.poi.ss.formula.EvaluationWorkbook.ExternalName;
import org.apache.poi.ss.formula.EvaluationWorkbook.ExternalSheet;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.ss.util.CellReference.NameType;
/**
* Contains all the contextual information required to evaluate an operation
* within a formula
*
* For POI internal use only
*
* @author Josh Micich
*/
public final class OperationEvaluationContext {
public static final FreeRefFunction UDF = UserDefinedFunction.instance;
private final EvaluationWorkbook _workbook;
private final int _sheetIndex;
private final int _rowIndex;
private final int _columnIndex;
private final EvaluationTracker _tracker;
private final WorkbookEvaluator _bookEvaluator;
public OperationEvaluationContext(WorkbookEvaluator bookEvaluator, EvaluationWorkbook workbook, int sheetIndex, int srcRowNum,
int srcColNum, EvaluationTracker tracker) {
_bookEvaluator = bookEvaluator;
_workbook = workbook;
_sheetIndex = sheetIndex;
_rowIndex = srcRowNum;
_columnIndex = srcColNum;
_tracker = tracker;
}
public EvaluationWorkbook getWorkbook() {
return _workbook;
}
public int getRowIndex() {
return _rowIndex;
}
public int getColumnIndex() {
return _columnIndex;
}
SheetRefEvaluator createExternSheetRefEvaluator(ExternSheetReferenceToken ptg) {
return createExternSheetRefEvaluator(ptg.getExternSheetIndex());
}
SheetRefEvaluator createExternSheetRefEvaluator(int externSheetIndex) {
ExternalSheet externalSheet = _workbook.getExternalSheet(externSheetIndex);
WorkbookEvaluator targetEvaluator;
int otherSheetIndex;
if (externalSheet == null) {
// sheet is in same workbook
otherSheetIndex = _workbook.convertFromExternSheetIndex(externSheetIndex);
targetEvaluator = _bookEvaluator;
} else {
// look up sheet by name from external workbook
String workbookName = externalSheet.getWorkbookName();
try {
targetEvaluator = _bookEvaluator.getOtherWorkbookEvaluator(workbookName);
} catch (WorkbookNotFoundException e) {
throw new RuntimeException(e.getMessage(), e);
}
otherSheetIndex = targetEvaluator.getSheetIndex(externalSheet.getSheetName());
if (otherSheetIndex < 0) {
throw new RuntimeException("Invalid sheet name '" + externalSheet.getSheetName()
+ "' in bool '" + workbookName + "'.");
}
}
return new SheetRefEvaluator(targetEvaluator, _tracker, otherSheetIndex);
}
/**
* @return null if either workbook or sheet is not found
*/
private SheetRefEvaluator createExternSheetRefEvaluator(String workbookName, String sheetName) {
WorkbookEvaluator targetEvaluator;
if (workbookName == null) {
targetEvaluator = _bookEvaluator;
} else {
if (sheetName == null) {
throw new IllegalArgumentException("sheetName must not be null if workbookName is provided");
}
try {
targetEvaluator = _bookEvaluator.getOtherWorkbookEvaluator(workbookName);
} catch (WorkbookNotFoundException e) {
return null;
}
}
int otherSheetIndex = sheetName == null ? _sheetIndex : targetEvaluator.getSheetIndex(sheetName);
if (otherSheetIndex < 0) {
return null;
}
return new SheetRefEvaluator(targetEvaluator, _tracker, otherSheetIndex);
}
public SheetRefEvaluator getRefEvaluatorForCurrentSheet() {
return new SheetRefEvaluator(_bookEvaluator, _tracker, _sheetIndex);
}
/**
* Resolves a cell or area reference dynamically.
* @param workbookName the name of the workbook containing the reference. If null
* the current workbook is assumed. Note - to evaluate formulas which use multiple workbooks,
* a {@link CollaboratingWorkbooksEnvironment} must be set up.
* @param sheetName the name of the sheet containing the reference. May be null
* (when workbookName is also null) in which case the current workbook and sheet is
* assumed.
* @param refStrPart1 the single cell reference or first part of the area reference. Must not
* be null.
* @param refStrPart2 the second part of the area reference. For single cell references this
* parameter must be null
* @param isA1Style specifies the format for refStrPart1 and refStrPart2.
* Pass true for 'A1' style and false for 'R1C1' style.
* TODO - currently POI only supports 'A1' reference style
* @return a {@link RefEval} or {@link AreaEval}
*/
public ValueEval getDynamicReference(String workbookName, String sheetName, String refStrPart1,
String refStrPart2, boolean isA1Style) {
if (!isA1Style) {
throw new RuntimeException("R1C1 style not supported yet");
}
SheetRefEvaluator sre = createExternSheetRefEvaluator(workbookName, sheetName);
if (sre == null) {
return ErrorEval.REF_INVALID;
}
// ugly typecast - TODO - make spreadsheet version more easily accessible
SpreadsheetVersion ssVersion = ((FormulaParsingWorkbook)_workbook).getSpreadsheetVersion();
NameType part1refType = classifyCellReference(refStrPart1, ssVersion);
switch (part1refType) {
case BAD_CELL_OR_NAMED_RANGE:
return ErrorEval.REF_INVALID;
case NAMED_RANGE:
EvaluationName nm = ((FormulaParsingWorkbook)_workbook).getName(refStrPart1, _sheetIndex);
if(!nm.isRange()){
throw new RuntimeException("Specified name '" + refStrPart1 + "' is not a range as expected.");
}
return _bookEvaluator.evaluateNameFormula(nm.getNameDefinition(), this);
}
if (refStrPart2 == null) {
// no ':'
switch (part1refType) {
case COLUMN:
case ROW:
return ErrorEval.REF_INVALID;
case CELL:
CellReference cr = new CellReference(refStrPart1);
return new LazyRefEval(cr.getRow(), cr.getCol(), sre);
}
throw new IllegalStateException("Unexpected reference classification of '" + refStrPart1 + "'.");
}
NameType part2refType = classifyCellReference(refStrPart1, ssVersion);
switch (part2refType) {
case BAD_CELL_OR_NAMED_RANGE:
return ErrorEval.REF_INVALID;
case NAMED_RANGE:
throw new RuntimeException("Cannot evaluate '" + refStrPart1
+ "'. Indirect evaluation of defined names not supported yet");
}
if (part2refType != part1refType) {
// LHS and RHS of ':' must be compatible
return ErrorEval.REF_INVALID;
}
int firstRow, firstCol, lastRow, lastCol;
switch (part1refType) {
case COLUMN:
firstRow =0;
lastRow = ssVersion.getLastRowIndex();
firstCol = parseColRef(refStrPart1);
lastCol = parseColRef(refStrPart2);
break;
case ROW:
firstCol = 0;
lastCol = ssVersion.getLastColumnIndex();
firstRow = parseRowRef(refStrPart1);
lastRow = parseRowRef(refStrPart2);
break;
case CELL:
CellReference cr;
cr = new CellReference(refStrPart1);
firstRow = cr.getRow();
firstCol = cr.getCol();
cr = new CellReference(refStrPart2);
lastRow = cr.getRow();
lastCol = cr.getCol();
break;
default:
throw new IllegalStateException("Unexpected reference classification of '" + refStrPart1 + "'.");
}
return new LazyAreaEval(firstRow, firstCol, lastRow, lastCol, sre);
}
private static int parseRowRef(String refStrPart) {
return CellReference.convertColStringToIndex(refStrPart);
}
private static int parseColRef(String refStrPart) {
return Integer.parseInt(refStrPart) - 1;
}
private static NameType classifyCellReference(String str, SpreadsheetVersion ssVersion) {
int len = str.length();
if (len < 1) {
return CellReference.NameType.BAD_CELL_OR_NAMED_RANGE;
}
return CellReference.classifyCellReference(str, ssVersion);
}
public FreeRefFunction findUserDefinedFunction(String functionName) {
return _bookEvaluator.findUserDefinedFunction(functionName);
}
public ValueEval getRefEval(int rowIndex, int columnIndex) {
SheetRefEvaluator sre = getRefEvaluatorForCurrentSheet();
return new LazyRefEval(rowIndex, columnIndex, sre);
}
public ValueEval getRef3DEval(int rowIndex, int columnIndex, int extSheetIndex) {
SheetRefEvaluator sre = createExternSheetRefEvaluator(extSheetIndex);
return new LazyRefEval(rowIndex, columnIndex, sre);
}
public ValueEval getAreaEval(int firstRowIndex, int firstColumnIndex,
int lastRowIndex, int lastColumnIndex) {
SheetRefEvaluator sre = getRefEvaluatorForCurrentSheet();
return new LazyAreaEval(firstRowIndex, firstColumnIndex, lastRowIndex, lastColumnIndex, sre);
}
public ValueEval getArea3DEval(int firstRowIndex, int firstColumnIndex,
int lastRowIndex, int lastColumnIndex, int extSheetIndex) {
SheetRefEvaluator sre = createExternSheetRefEvaluator(extSheetIndex);
return new LazyAreaEval(firstRowIndex, firstColumnIndex, lastRowIndex, lastColumnIndex, sre);
}
public ValueEval getNameXEval(NameXPtg nameXPtg) {
ExternalSheet externSheet = _workbook.getExternalSheet(nameXPtg.getSheetRefIndex());
if(externSheet == null)
return new NameXEval(nameXPtg);
String workbookName = externSheet.getWorkbookName();
ExternalName externName = _workbook.getExternalName(
nameXPtg.getSheetRefIndex(),
nameXPtg.getNameIndex()
);
try{
WorkbookEvaluator refWorkbookEvaluator = _bookEvaluator.getOtherWorkbookEvaluator(workbookName);
EvaluationName evaluationName = refWorkbookEvaluator.getName(externName.getName(),externName.getIx()-1);
if(evaluationName != null && evaluationName.hasFormula()){
if (evaluationName.getNameDefinition().length > 1) {
throw new RuntimeException("Complex name formulas not supported yet");
}
Ptg ptg = evaluationName.getNameDefinition()[0];
if(ptg instanceof Ref3DPtg){
Ref3DPtg ref3D = (Ref3DPtg)ptg;
int sheetIndex = refWorkbookEvaluator.getSheetIndexByExternIndex(ref3D.getExternSheetIndex());
String sheetName = refWorkbookEvaluator.getSheetName(sheetIndex);
SheetRefEvaluator sre = createExternSheetRefEvaluator(workbookName, sheetName);
return new LazyRefEval(ref3D.getRow(), ref3D.getColumn(), sre);
}else if(ptg instanceof Area3DPtg){
Area3DPtg area3D = (Area3DPtg)ptg;
int sheetIndex = refWorkbookEvaluator.getSheetIndexByExternIndex(area3D.getExternSheetIndex());
String sheetName = refWorkbookEvaluator.getSheetName(sheetIndex);
SheetRefEvaluator sre = createExternSheetRefEvaluator(workbookName, sheetName);
return new LazyAreaEval(area3D.getFirstRow(), area3D.getFirstColumn(), area3D.getLastRow(), area3D.getLastColumn(), sre);
}
}
return ErrorEval.REF_INVALID;
}catch(WorkbookNotFoundException wnfe){
return ErrorEval.REF_INVALID;
}
}
}