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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
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http://www.apache.org/licenses/LICENSE-2.0
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distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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package org.apache.poi.hssf.model;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.poi.hssf.record.CRNCountRecord;
import org.apache.poi.hssf.record.CRNRecord;
import org.apache.poi.hssf.record.CountryRecord;
import org.apache.poi.hssf.record.ExternSheetRecord;
import org.apache.poi.hssf.record.ExternalNameRecord;
import org.apache.poi.hssf.record.NameCommentRecord;
import org.apache.poi.hssf.record.NameRecord;
import org.apache.poi.hssf.record.Record;
import org.apache.poi.hssf.record.SupBookRecord;
import org.apache.poi.ss.formula.ptg.*;
/**
* Link Table (OOO pdf reference: 4.10.3 ) <p/>
*
* The main data of all types of references is stored in the Link Table inside the Workbook Globals
* Substream (4.2.5). The Link Table itself is optional and occurs only, if there are any
* references in the document.
* <p/>
*
* In BIFF8 the Link Table consists of
* <ul>
* <li>zero or more EXTERNALBOOK Blocks<p/>
* each consisting of
* <ul>
* <li>exactly one EXTERNALBOOK (0x01AE) record</li>
* <li>zero or more EXTERNALNAME (0x0023) records</li>
* <li>zero or more CRN Blocks<p/>
* each consisting of
* <ul>
* <li>exactly one XCT (0x0059)record</li>
* <li>zero or more CRN (0x005A) records (documentation says one or more)</li>
* </ul>
* </li>
* </ul>
* </li>
* <li>zero or one EXTERNSHEET (0x0017) record</li>
* <li>zero or more DEFINEDNAME (0x0018) records</li>
* </ul>
*/
final class LinkTable {
// TODO make this class into a record aggregate
private static final class CRNBlock {
private final CRNCountRecord _countRecord;
private final CRNRecord[] _crns;
public CRNBlock(RecordStream rs) {
_countRecord = (CRNCountRecord) rs.getNext();
int nCRNs = _countRecord.getNumberOfCRNs();
CRNRecord[] crns = new CRNRecord[nCRNs];
for (int i = 0; i < crns.length; i++) {
crns[i] = (CRNRecord) rs.getNext();
}
_crns = crns;
}
public CRNRecord[] getCrns() {
return _crns.clone();
}
}
private static final class ExternalBookBlock {
private final SupBookRecord _externalBookRecord;
private ExternalNameRecord[] _externalNameRecords;
private final CRNBlock[] _crnBlocks;
public ExternalBookBlock(RecordStream rs) {
_externalBookRecord = (SupBookRecord) rs.getNext();
List<Object> temp = new ArrayList<Object>();
while(rs.peekNextClass() == ExternalNameRecord.class) {
temp.add(rs.getNext());
}
_externalNameRecords = new ExternalNameRecord[temp.size()];
temp.toArray(_externalNameRecords);
temp.clear();
while(rs.peekNextClass() == CRNCountRecord.class) {
temp.add(new CRNBlock(rs));
}
_crnBlocks = new CRNBlock[temp.size()];
temp.toArray(_crnBlocks);
}
/**
* Create a new block for internal references. It is called when constructing a new LinkTable.
*
* @see org.apache.poi.hssf.model.LinkTable#LinkTable(int, WorkbookRecordList)
*/
public ExternalBookBlock(int numberOfSheets) {
_externalBookRecord = SupBookRecord.createInternalReferences((short)numberOfSheets);
_externalNameRecords = new ExternalNameRecord[0];
_crnBlocks = new CRNBlock[0];
}
/**
* Create a new block for registering add-in functions
*
* @see org.apache.poi.hssf.model.LinkTable#addNameXPtg(String)
*/
public ExternalBookBlock() {
_externalBookRecord = SupBookRecord.createAddInFunctions();
_externalNameRecords = new ExternalNameRecord[0];
_crnBlocks = new CRNBlock[0];
}
public SupBookRecord getExternalBookRecord() {
return _externalBookRecord;
}
public String getNameText(int definedNameIndex) {
return _externalNameRecords[definedNameIndex].getText();
}
public int getNameIx(int definedNameIndex) {
return _externalNameRecords[definedNameIndex].getIx();
}
/**
* Performs case-insensitive search
* @return -1 if not found
*/
public int getIndexOfName(String name) {
for (int i = 0; i < _externalNameRecords.length; i++) {
if(_externalNameRecords[i].getText().equalsIgnoreCase(name)) {
return i;
}
}
return -1;
}
public int getNumberOfNames() {
return _externalNameRecords.length;
}
public int addExternalName(ExternalNameRecord rec){
ExternalNameRecord[] tmp = new ExternalNameRecord[_externalNameRecords.length + 1];
System.arraycopy(_externalNameRecords, 0, tmp, 0, _externalNameRecords.length);
tmp[tmp.length - 1] = rec;
_externalNameRecords = tmp;
return _externalNameRecords.length - 1;
}
}
private ExternalBookBlock[] _externalBookBlocks;
private final ExternSheetRecord _externSheetRecord;
private final List<NameRecord> _definedNames;
private final int _recordCount;
private final WorkbookRecordList _workbookRecordList; // TODO - would be nice to remove this
public LinkTable(List inputList, int startIndex, WorkbookRecordList workbookRecordList, Map<String, NameCommentRecord> commentRecords) {
_workbookRecordList = workbookRecordList;
RecordStream rs = new RecordStream(inputList, startIndex);
List<ExternalBookBlock> temp = new ArrayList<ExternalBookBlock>();
while(rs.peekNextClass() == SupBookRecord.class) {
temp.add(new ExternalBookBlock(rs));
}
_externalBookBlocks = new ExternalBookBlock[temp.size()];
temp.toArray(_externalBookBlocks);
temp.clear();
if (_externalBookBlocks.length > 0) {
// If any ExternalBookBlock present, there is always 1 of ExternSheetRecord
if (rs.peekNextClass() != ExternSheetRecord.class) {
// not quite - if written by google docs
_externSheetRecord = null;
} else {
_externSheetRecord = readExtSheetRecord(rs);
}
} else {
_externSheetRecord = null;
}
_definedNames = new ArrayList<NameRecord>();
// collect zero or more DEFINEDNAMEs id=0x18,
// with their comments if present
while(true) {
Class nextClass = rs.peekNextClass();
if (nextClass == NameRecord.class) {
NameRecord nr = (NameRecord)rs.getNext();
_definedNames.add(nr);
}
else if (nextClass == NameCommentRecord.class) {
NameCommentRecord ncr = (NameCommentRecord)rs.getNext();
commentRecords.put(ncr.getNameText(), ncr);
}
else {
break;
}
}
_recordCount = rs.getCountRead();
_workbookRecordList.getRecords().addAll(inputList.subList(startIndex, startIndex + _recordCount));
}
private static ExternSheetRecord readExtSheetRecord(RecordStream rs) {
List<ExternSheetRecord> temp = new ArrayList<ExternSheetRecord>(2);
while(rs.peekNextClass() == ExternSheetRecord.class) {
temp.add((ExternSheetRecord) rs.getNext());
}
int nItems = temp.size();
if (nItems < 1) {
throw new RuntimeException("Expected an EXTERNSHEET record but got ("
+ rs.peekNextClass().getName() + ")");
}
if (nItems == 1) {
// this is the normal case. There should be just one ExternSheetRecord
return temp.get(0);
}
// Some apps generate multiple ExternSheetRecords (see bug 45698).
// It seems like the best thing to do might be to combine these into one
ExternSheetRecord[] esrs = new ExternSheetRecord[nItems];
temp.toArray(esrs);
return ExternSheetRecord.combine(esrs);
}
public LinkTable(int numberOfSheets, WorkbookRecordList workbookRecordList) {
_workbookRecordList = workbookRecordList;
_definedNames = new ArrayList<NameRecord>();
_externalBookBlocks = new ExternalBookBlock[] {
new ExternalBookBlock(numberOfSheets),
};
_externSheetRecord = new ExternSheetRecord();
_recordCount = 2;
// tell _workbookRecordList about the 2 new records
SupBookRecord supbook = _externalBookBlocks[0].getExternalBookRecord();
int idx = findFirstRecordLocBySid(CountryRecord.sid);
if(idx < 0) {
throw new RuntimeException("CountryRecord not found");
}
_workbookRecordList.add(idx+1, _externSheetRecord);
_workbookRecordList.add(idx+1, supbook);
}
/**
* TODO - would not be required if calling code used RecordStream or similar
*/
public int getRecordCount() {
return _recordCount;
}
/**
* @param builtInCode a BUILTIN_~ constant from {@link NameRecord}
* @param sheetNumber 1-based sheet number
*/
public NameRecord getSpecificBuiltinRecord(byte builtInCode, int sheetNumber) {
Iterator iterator = _definedNames.iterator();
while (iterator.hasNext()) {
NameRecord record = ( NameRecord ) iterator.next();
//print areas are one based
if (record.getBuiltInName() == builtInCode && record.getSheetNumber() == sheetNumber) {
return record;
}
}
return null;
}
public void removeBuiltinRecord(byte name, int sheetIndex) {
//the name array is smaller so searching through it should be faster than
//using the findFirstXXXX methods
NameRecord record = getSpecificBuiltinRecord(name, sheetIndex);
if (record != null) {
_definedNames.remove(record);
}
// TODO - do we need "Workbook.records.remove(...);" similar to that in Workbook.removeName(int namenum) {}?
}
public int getNumNames() {
return _definedNames.size();
}
public NameRecord getNameRecord(int index) {
return _definedNames.get(index);
}
public void addName(NameRecord name) {
_definedNames.add(name);
// TODO - this is messy
// Not the most efficient way but the other way was causing too many bugs
int idx = findFirstRecordLocBySid(ExternSheetRecord.sid);
if (idx == -1) idx = findFirstRecordLocBySid(SupBookRecord.sid);
if (idx == -1) idx = findFirstRecordLocBySid(CountryRecord.sid);
int countNames = _definedNames.size();
_workbookRecordList.add(idx+countNames, name);
}
public void removeName(int namenum) {
_definedNames.remove(namenum);
}
/**
* checks if the given name is already included in the linkTable
*/
public boolean nameAlreadyExists(NameRecord name)
{
// Check to ensure no other names have the same case-insensitive name
for ( int i = getNumNames()-1; i >=0; i-- ) {
NameRecord rec = getNameRecord(i);
if (rec != name) {
if (isDuplicatedNames(name, rec))
return true;
}
}
return false;
}
private static boolean isDuplicatedNames(NameRecord firstName, NameRecord lastName) {
return lastName.getNameText().equalsIgnoreCase(firstName.getNameText())
&& isSameSheetNames(firstName, lastName);
}
private static boolean isSameSheetNames(NameRecord firstName, NameRecord lastName) {
return lastName.getSheetNumber() == firstName.getSheetNumber();
}
public String[] getExternalBookAndSheetName(int extRefIndex) {
int ebIx = _externSheetRecord.getExtbookIndexFromRefIndex(extRefIndex);
SupBookRecord ebr = _externalBookBlocks[ebIx].getExternalBookRecord();
if (!ebr.isExternalReferences()) {
return null;
}
// Sheet name only applies if not a global reference
int shIx = _externSheetRecord.getFirstSheetIndexFromRefIndex(extRefIndex);
String usSheetName = null;
if(shIx >= 0) {
usSheetName = ebr.getSheetNames()[shIx];
}
return new String[] {
ebr.getURL(),
usSheetName,
};
}
public int getExternalSheetIndex(String workbookName, String sheetName) {
SupBookRecord ebrTarget = null;
int externalBookIndex = -1;
for (int i=0; i<_externalBookBlocks.length; i++) {
SupBookRecord ebr = _externalBookBlocks[i].getExternalBookRecord();
if (!ebr.isExternalReferences()) {
continue;
}
if (workbookName.equals(ebr.getURL())) { // not sure if 'equals()' works when url has a directory
ebrTarget = ebr;
externalBookIndex = i;
break;
}
}
if (ebrTarget == null) {
throw new RuntimeException("No external workbook with name '" + workbookName + "'");
}
int sheetIndex = getSheetIndex(ebrTarget.getSheetNames(), sheetName);
int result = _externSheetRecord.getRefIxForSheet(externalBookIndex, sheetIndex);
if (result < 0) {
throw new RuntimeException("ExternSheetRecord does not contain combination ("
+ externalBookIndex + ", " + sheetIndex + ")");
}
return result;
}
private static int getSheetIndex(String[] sheetNames, String sheetName) {
for (int i = 0; i < sheetNames.length; i++) {
if (sheetNames[i].equals(sheetName)) {
return i;
}
}
throw new RuntimeException("External workbook does not contain sheet '" + sheetName + "'");
}
/**
* @param extRefIndex as from a {@link Ref3DPtg} or {@link Area3DPtg}
* @return -1 if the reference is to an external book
*/
public int getIndexToInternalSheet(int extRefIndex) {
return _externSheetRecord.getFirstSheetIndexFromRefIndex(extRefIndex);
}
public int getSheetIndexFromExternSheetIndex(int extRefIndex) {
if (extRefIndex >= _externSheetRecord.getNumOfRefs() || extRefIndex < 0) {
return -1;
}
return _externSheetRecord.getFirstSheetIndexFromRefIndex(extRefIndex);
}
public int checkExternSheet(int sheetIndex) {
int thisWbIndex = -1; // this is probably always zero
for (int i=0; i<_externalBookBlocks.length; i++) {
SupBookRecord ebr = _externalBookBlocks[i].getExternalBookRecord();
if (ebr.isInternalReferences()) {
thisWbIndex = i;
break;
}
}
if (thisWbIndex < 0) {
throw new RuntimeException("Could not find 'internal references' EXTERNALBOOK");
}
//Trying to find reference to this sheet
int i = _externSheetRecord.getRefIxForSheet(thisWbIndex, sheetIndex);
if (i>=0) {
return i;
}
//We haven't found reference to this sheet
return _externSheetRecord.addRef(thisWbIndex, sheetIndex, sheetIndex);
}
/**
* copied from Workbook
*/
private int findFirstRecordLocBySid(short sid) {
int index = 0;
for (Iterator iterator = _workbookRecordList.iterator(); iterator.hasNext(); ) {
Record record = ( Record ) iterator.next();
if (record.getSid() == sid) {
return index;
}
index ++;
}
return -1;
}
public String resolveNameXText(int refIndex, int definedNameIndex) {
int extBookIndex = _externSheetRecord.getExtbookIndexFromRefIndex(refIndex);
return _externalBookBlocks[extBookIndex].getNameText(definedNameIndex);
}
public int resolveNameXIx(int refIndex, int definedNameIndex) {
int extBookIndex = _externSheetRecord.getExtbookIndexFromRefIndex(refIndex);
return _externalBookBlocks[extBookIndex].getNameIx(definedNameIndex);
}
public NameXPtg getNameXPtg(String name) {
// first find any external book block that contains the name:
for (int i = 0; i < _externalBookBlocks.length; i++) {
int definedNameIndex = _externalBookBlocks[i].getIndexOfName(name);
if (definedNameIndex < 0) {
continue;
}
// found it.
int sheetRefIndex = findRefIndexFromExtBookIndex(i);
if (sheetRefIndex >= 0) {
return new NameXPtg(sheetRefIndex, definedNameIndex);
}
}
return null;
}
/**
* Register an external name in this workbook
*
* @param name the name to register
* @return a NameXPtg describing this name
*/
public NameXPtg addNameXPtg(String name) {
int extBlockIndex = -1;
ExternalBookBlock extBlock = null;
// find ExternalBlock for Add-In functions and remember its index
for (int i = 0; i < _externalBookBlocks.length; i++) {
SupBookRecord ebr = _externalBookBlocks[i].getExternalBookRecord();
if (ebr.isAddInFunctions()) {
extBlock = _externalBookBlocks[i];
extBlockIndex = i;
break;
}
}
// An ExternalBlock for Add-In functions was not found. Create a new one.
if (extBlock == null) {
extBlock = new ExternalBookBlock();
ExternalBookBlock[] tmp = new ExternalBookBlock[_externalBookBlocks.length + 1];
System.arraycopy(_externalBookBlocks, 0, tmp, 0, _externalBookBlocks.length);
tmp[tmp.length - 1] = extBlock;
_externalBookBlocks = tmp;
extBlockIndex = _externalBookBlocks.length - 1;
// add the created SupBookRecord before ExternSheetRecord
int idx = findFirstRecordLocBySid(ExternSheetRecord.sid);
_workbookRecordList.add(idx, extBlock.getExternalBookRecord());
// register the SupBookRecord in the ExternSheetRecord
// -2 means that the scope of this name is Workbook and the reference applies to the entire workbook.
_externSheetRecord.addRef(_externalBookBlocks.length - 1, -2, -2);
}
// create a ExternalNameRecord that will describe this name
ExternalNameRecord extNameRecord = new ExternalNameRecord();
extNameRecord.setText(name);
// The docs don't explain why Excel set the formula to #REF!
extNameRecord.setParsedExpression(new Ptg[]{ErrPtg.REF_INVALID});
int nameIndex = extBlock.addExternalName(extNameRecord);
int supLinkIndex = 0;
// find the posistion of the Add-In SupBookRecord in the workbook stream,
// the created ExternalNameRecord will be appended to it
for (Iterator iterator = _workbookRecordList.iterator(); iterator.hasNext(); supLinkIndex++) {
Record record = (Record) iterator.next();
if (record instanceof SupBookRecord) {
if (((SupBookRecord) record).isAddInFunctions()) break;
}
}
int numberOfNames = extBlock.getNumberOfNames();
// a new name is inserted in the end of the SupBookRecord, after the last name
_workbookRecordList.add(supLinkIndex + numberOfNames, extNameRecord);
int ix = _externSheetRecord.getRefIxForSheet(extBlockIndex, -2 /* the scope is workbook*/);
return new NameXPtg(ix, nameIndex);
}
private int findRefIndexFromExtBookIndex(int extBookIndex) {
return _externSheetRecord.findRefIndexFromExtBookIndex(extBookIndex);
}
/**
* Changes an external referenced file to another file.
* A formular in Excel which refers a cell in another file is saved in two parts:
* The referenced file is stored in an reference table. the row/cell information is saved separate.
* This method invokation will only change the reference in the lookup-table itself.
* @param oldUrl The old URL to search for and which is to be replaced
* @param newUrl The URL replacement
* @return true if the oldUrl was found and replaced with newUrl. Otherwise false
*/
public boolean changeExternalReference(String oldUrl, String newUrl) {
for(ExternalBookBlock ex : _externalBookBlocks) {
SupBookRecord externalRecord = ex.getExternalBookRecord();
if (externalRecord.isExternalReferences()
&& externalRecord.getURL().equals(oldUrl)) {
externalRecord.setURL(newUrl);
return true;
}
}
return false;
}
}