org.apache.poi.hssf.eventusermodel.EventWorkbookBuilder Maven / Gradle / Ivy
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package org.apache.poi.hssf.eventusermodel;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.model.HSSFFormulaParser;
import org.apache.poi.hssf.model.InternalWorkbook;
import org.apache.poi.hssf.record.BoundSheetRecord;
import org.apache.poi.hssf.record.EOFRecord;
import org.apache.poi.hssf.record.ExternSheetRecord;
import org.apache.poi.hssf.record.Record;
import org.apache.poi.hssf.record.SSTRecord;
import org.apache.poi.hssf.record.SupBookRecord;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
/**
* When working with the EventUserModel, if you want to
* process formulas, you need an instance of
* {@link InternalWorkbook} to pass to a {@link HSSFWorkbook},
* to finally give to {@link HSSFFormulaParser},
* and this will build you stub ones.
* Since you're working with the EventUserModel, you
* wouldn't want to get a full {@link InternalWorkbook} and
* {@link HSSFWorkbook}, as they would eat too much memory.
* Instead, you should collect a few key records as they
* go past, then call this once you have them to build a
* stub {@link InternalWorkbook}, and from that a stub
* {@link HSSFWorkbook}, to use with the {@link HSSFFormulaParser}.
*
* The records you should collect are:
* * {@link ExternSheetRecord}
* * {@link BoundSheetRecord}
* You should probably also collect {@link SSTRecord},
* but it's not required to pass this in.
*
* To help, this class includes a HSSFListener wrapper
* that will do the collecting for you.
*/
public class EventWorkbookBuilder {
/**
* Creates a stub Workbook from the supplied records,
* suitable for use with the {@link HSSFFormulaParser}
* @param externs The ExternSheetRecords in your file
* @param bounds The BoundSheetRecords in your file
* @param sst The SSTRecord in your file.
* @return A stub Workbook suitable for use with {@link HSSFFormulaParser}
*/
public static InternalWorkbook createStubWorkbook(ExternSheetRecord[] externs,
BoundSheetRecord[] bounds, SSTRecord sst) {
List wbRecords = new ArrayList();
// Core Workbook records go first
if(bounds != null) {
for(int i=0; i