Using Apache POI, I'm able to find a named range:
XSSFName[] ranges = new XSSFName[workbook.getNumberOfNames()];
for (int i = 0; i < _wb.getNumberOfNames(); i++)
ranges[i] = workbook.getNameAt(i);
With that, I'm able to cell an AreaReference:
AreaReference area = new AreaReference(ranges[0].getRefersToFormula());
And then finally I can get all the cells within that range:
CellReference[] cells = area.getAllReferencedCells();
That all works just fine. Burt I have a use case where I have to redefine the area that the range covers. Is there a way to do that? I notice that the range.getRefersToFormula() method return a String, something like MySheet!$A$1:$B$8. There is a range.setRefersToFormula(String formula), but I've got to believe there's a way other than resorting to writing an excel range formula parser on my own. Is there no way to generate an AreaReference with a set to Cell references of something more type-safe? Do I actually have to generate a String to represent the new range? I would think there would be API somewhere to help me with this but I can't seem to find it.
Update
I found some API, but it doesn't seem to work, at least it doesn't save properly. Here's what I did.
AreaReference newArea = new AreaReference(firstCell, lastCell);
ranges[0].setRefersToFormula(newArea.formatAsString())
It seems to set the formula correctly, but when I stream the workbook back out to disk, the range is completely wrong.
you can update the existing Reference and set it as per your requirement.
Suppose the reference contains TestSheet!$A$1:$B$8and you want to change it to MySheet!$B$5:$C$12
For any cell, say "B5", at runtime,
cell.getReference();
will give you cell reference (like in example... it will return you "B5")
char startCellColRef = cell.getReference().toString().charAt(0);
will give you the Column Reference (will give you "B" if the current cell is B5). Now
int startCellRowRef = cell.getReference().toString().charAt(1);
will give you Row Index (will give you "5" if the current cell is B5).
By the same way you can get your start and end cell references (say B5 and C12).
Now comes how can I update the existing references. Just update its value with newly created reference string
Name reference = wb.getName("NameReferenceInExcelSheet");
referenceString = sheetName+"!$"+startCellColRef+"$"+startCellRowRef+":$"+endCellColRef+"$"+endCellRowRef;
reference.setRefersToFormula(referenceString);
Related
I have a excel file with a cell that generates the number 3.69 (based on calculations from proceeding numbers)
However when pulling that number in java using
if (brightCell.getNumericCellValue()) > 0 )
{
double brightness = brightCell.getNumericCellValue();
return brightness;
}
I've also tried:
if (Double.parseDouble(brightCell.getStringCellValue()) > 0 )
{
double brightness = Double.parseDouble(brightCell.getStringCellValue());
return brightness;
}
brightCell is instantiated with :
brightCell = spreadsheet.getRow(new CellReference(brightString).getRow()).getCell(new CellReference(brightString).getCol());
brightString is String brightString = "BV29"
But with both solutions, brightness receives the value, 3.2133....
So thanks to #Igor I managed to figure it out but it led to more issues.
So the solution was creating an evaluator
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
evaluator.setIgnoreMissingWorkbooks(true); //if you need it
when you finish setting the required cells and want to evaluate.
evaluator.EvaluateAll();
The problem for me is I'm doing this multiple times and my 1st resut is correct but upon the second iteration it becomes skewed, and more skewed.
What I'm doing is setting various cells (via java) then before I retrieve the value for a cell (that contains a formula) I run EvaluateAll. Now, I'm not sure if I should be evaluating after EVERY change or after I make all my changes to the excel sheet (via java).
I can't evaluate a specific cell at a time because there's over 38 sheets with multitudes of formulas. So EvaluateAll is the best option for me
EDIT 26/10/2018*
So the issue was not clearing the cache after making inputs. The solution was after each input as specified in the javaDoc that:
Should be called whenever there are changes to input cells in the evaluated workbook.
Failure to call this method after changing cell values will cause incorrect behaviour
of the evaluate~ methods of this class
therefore after making an input on a cell you should call evaluator.clearAllCachedResultValues();
I am creating a Java application in which I am interacting with document file .docx. I am using Apache POI to generate it and modify into it.
The existing file is having tables like:
Tables that are created initially.
I have to add the rows in the first table so that the output is something like: The way the 2 tables should be shown
So this is like I am allowing table 1 to occupy the space till it can go in document page, it is followed by another table. This type of table is needed because after that I am removing its inside borders and it shows something like: how it should be shown with inside borders removed.
I am adding the blank rows using this piece of code..
for (int i = 0; i < itemCount; i++) {
oldRow = table.getRow(i);
newRow = table.insertNewTableRow(i + 1);
for (int j = 0; j < oldRow.getTableCells().size(); j++) {
cell = newRow.createCell();
CTTcPr ctTcPr = cell.getCTTc().addNewTcPr();
ctTcPr.addNewTcBorders().addNewTop().setVal(STBorder.NIL);
ctTcPr.addNewTcBorders().addNewBottom().setVal(STBorder.NIL);
CTTblWidth cellWidth = ctTcPr.addNewTcW();
cellWidth.setType(oldRow.getCell(j).getCTTc().getTcPr().getTcW().getType());
// sets type of width
BigInteger width = oldRow.getCell(j).getCTTc().getTcPr().getTcW().getW();
cellWidth.setW(width); // sets width
if (oldRow.getCell(j).getCTTc().getTcPr().getGridSpan() != null) {
ctTcPr.setGridSpan(oldRow.getCell(j).
getCTTc().getTcPr().getGridSpan()); // sets grid span if any
}
}
}
In few of the lines in starting, I am adding value as something like:
paragraph = row.getCell(0).getParagraphArray(0);
if (paragraph == null) {
paragraph = row.getCell(0).addParagraph();
}
run = setRunAndParagraph(paragraph);
run.setText(itemNames[i]);
All this works nicely, this code was helped by a great coder here who helped me to solve earlier issue.
Now, when I am inserting the rows, I can manually count that for A4 size page, this many rows will be there in table 1, and can iterate likewise. But, the issue is, some item names are wider than column length and as word wrap is on, row for that particular item takes height twice as normal. So, I can get number of rows but not exactly decide how many lines occupied by the items.
The rows appended are for better look and application specific so I thought of an approach that may work:
I am adding page numbers in footer, after inserting a blank row, I am checking whether total page numbers of a document changed or not, if yes that means the code stops there. And as there's 1 excess row I am removing it.
But the issue here arise is I am not able to get page number. I tried
document.getProperties().getExtendedProperties().getUnderlyingProperties().getPages();
But that always shows 1 even if total pages becomes 2. I searched for an approach stating to check form-feed but I think I am having tables here so I don't know it will be helpful approach or not. So I went for adding page number in the page as a field but that also gave 1 every time. Then I tried to do it with footer and this is how I am writing the page number.
XWPFHeaderFooterPolicy p = document.createHeaderFooterPolicy();
XWPFFooter f = p.createFooter(XWPFHeaderFooterPolicy.DEFAULT);
paragraph = f.createParagraph();
//paragraph.createRun().setText("Page: ");
paragraph.createRun();
paragraph.getCTP().addNewFldSimple().setInstr("PAGE \\* MERGEFORMAT");
Now I don't know how to get value of this field, I tried getText() on footer but it did not gave the number. I read that fields are related to paragraph so I tried to get the paragraph from the footer and tried to call getText() but the output is nothing. So can someone help me with this scenario? Right now I am getting the response like this: some part of second table going in next page.
I tried to implement solution I found, but I could not get it resolved yet. so if someone can help me in this scenario like how to fetch this page numbers from the field inserted in the document, it would be really great. I tried to provide more details so that if there's a better approach than this then also someone can suggest the same. Thank you.. :)
My Java application reads an xls file and presents it on a JTable. So far so good.
When I try to save my worksheet, I iterate over row,col in my JTable and:
String str = (String) Table.getValueAt(row, col);
HSSFRow thisrow = sheet.getRow(row);
HSSFCell thiscell = thisrow.getCell(col);
if(thiscell==null) thiscell = thisrow.createCell(col);
switch(inferType(str)) {
case "formula":
thiscell.setCellType(Cell.CELL_TYPE_FORMULA);
thiscell.setCellFormula(str.substring(1));
break;
case "numeric":
thiscell.setCellType(Cell.CELL_TYPE_NUMERIC);
thiscell.setCellValue(Double.parseDouble(str));
break;
case "text":
thiscell.setCellType(Cell.CELL_TYPE_STRING);
thiscell.setCellValue(str);
break;
}
But when I run over a cell which was originally a formula, say A1/B1, that is #DIV/0! at the moment, setCellType fails.
With much investigation I found out that when setCellType is called, it tries to convert the old content to the new type. BUT, this didn't seem a problem to me, since every table formula cell was already a formula in the xls. Hence, I am never actually changing types.
Even so, when I call setCellType(Cell.CELL_TYPE_FORMULA) on a cell that is already a formula, but it is evaluated to #DIV/0!, I get an conversion exception.
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: Cannot get a numeric value from a error formula cell
at org.apache.poi.hssf.usermodel.HSSFCell.typeMismatch(HSSFCell.java:648)
at org.apache.poi.hssf.usermodel.HSSFCell.checkFormulaCachedValueType(HSSFCell.java:653)
at org.apache.poi.hssf.usermodel.HSSFCell.getNumericCellValue(HSSFCell.java:678)
at org.apache.poi.hssf.usermodel.HSSFCell.setCellType(HSSFCell.java:317)
at org.apache.poi.hssf.usermodel.HSSFCell.setCellType(HSSFCell.java:283)
Actually my only workaround is, before setCellType:
if(thiscell.getCachedFormulaResultType()==Cell.CELL_TYPE_ERROR)
thiscell = thisrow.createCell(col);
This IS working, but I lose the original layout of the cell, e.g. its colors.
How can I properly setCellType if the Cell is a formula with evaluation error?
I found this in the mailing list of poi-apache:
There are two possible scenarios when setting value for a formula
cell;
Update the pre-calculated value of the formula. If a cell contains formula then cell.setCellValue just updates the pre-calculated
(cached) formula value, the formula itself remains and the cell type
is not changed
Remove the formula and change the cell type to String or Number:
cell.setCellFormula(null); //Remove the formula
then cell.setCellValue("I changed! My type is CELL_TYPE_STRING now"");
or cell.setCellValue(200); //NA() is gone, the real value is 200
I think we can improve cell.setCellValue for the case (1). If the new
value conflicts with formula type then IllegalArgumentException should
be thrown.
Regards, Yegor
Still, it does feel like a workaround to me. But everything is now working.
cell.setCellFormula(null) before any setCellType should prevent conversion failure, because the first will discard the cached content.
I've got a view that contains documents with various questions I want answered about Purchase Orders.
Using a repeat, I list all the questions. There are a few different kinds of questions, so I only render the answer field that I need based on the FieldType column value. I want to pull the choices for a combobox from the DialogChoices field on the question document.
I'm currently getting the choices showing as plain text on the next line after the empty combobox instead of as the selectItems. Where is my code going wrong?
<xp:comboBox id="comboBox1">
<xp:this.rendered><![CDATA[#{javascript:rowData.getColumnValue("FieldType") == "Dialog Box"; }]]></xp:this.rendered>
<xp:selectItems>
<xp:this.value><![CDATA[#{javascript:var doc:NotesDocument = rowData.getDocument();
var choicesVector:java.util.Vector= doc.getItemValue("DialogChoices");
var choices = [];
// loop through the vector, doing push into the array
for (i=0; i<choicesVector.size(); i++) {
choices.push (choicesVector.elementAt(i))
};
return choices;}]]>
</xp:this.value>
</xp:selectItems>
</xp:comboBox>
Strange, but a test database with the code above does not seem to give me strange results. Maybe it is because the data is in fact not an Vector but just a string?
Here are some tips :
The first thing you could change in your code is the loop to get all the data out of your field. Since the value property of a combobox already expects an array or vector you can change the code to something like:
<xp:this.value><![CDATA[#{javascript:var doc:NotesDocument = rowData.getDocument();
return doc.getItemValue("DialogChoices");
}]]>
</xp:this.value>
But it would be even better to remove the getDocument call at all. If possible you can add a column to the view are you are using for the repeat's datasource. In this column you get the data from the field directory. This way you can use the viewentry's getColumnValue() which is a performance optimization. Something like:
<xp:selectItems>
<xp:this.value><![CDATA[#{try{
return rowData.getColumnValue("DialogChoices");
}catch(e){// do something }]]>
</xp:this.value>
</xp:selectItems>
I am trying to modify the existing code which converts MS word documents to text using apache POI. I am new to this Apache POI API. There is GetTableLevel() method of org.apache.poi.hwpf.usermodel.Paragraph class which returns some integer value.
For some table, this method returns value 1 and for some other tables it returns 0. I am not able to understand this behaviour.
I looked at JavaDoc of this API here but there is no description about the return values of this method.
Can anyone please tell me what are the possible return values of this method?
Here is code snippet which calls the GetTableLevel() method :
for (int x = 0; x < lenParagraph; x++) {
Paragraph paragraph = range.getParagraph(x);
int tableLevel = paragraph.getTableLevel();
Please enlighten !!!
paragraph.getTableLevel() returns the nesting level (aka "table depth") of a table. For paragraphs which are not part of a table this call always yields 0 - and in addition paragraph.isInTable() will return false.
A return value of 1 indicates an ordinary (top level) table. All values n>1 represent a table which is nested n-1 times within another (parent) table.
For more details see [MS-DOC, Section 2.4.3].
try the source at http://kickjava.com/src/org/apache/poi/hwpf/usermodel/Paragraph.java.htm