Examples of org.apache.poi.hssf.record.EscherAggregate

org.apache.poi.hssf.record.EscherAggregate
This class is used to aggregate the MSODRAWING and OBJ record combinations. This is necessary due to the bizare way in which these records are serialized. What happens is that you get a combination of MSODRAWING -> OBJ -> MSODRAWING -> OBJ records but the escher records are serialized _across_ the MSODRAWING records.
It gets even worse when you start looking at TXO records.
So what we do with this class is aggregate lazily. That is we don't aggregate the MSODRAWING -> OBJ records unless we need to modify them. @author Glen Stampoultzis (glens at apache.org)

    public HSSFPatriarch createDrawingPatriarch() {
        // Create the drawing group if it doesn't already exist.
        _book.createDrawingGroup();


        _sheet.aggregateDrawingRecords(_book.getDrawingManager(), true);
        EscherAggregate agg = (EscherAggregate) _sheet.findFirstRecordBySid(EscherAggregate.sid);
        HSSFPatriarch patriarch = new HSSFPatriarch(this, agg);
        agg.clear();     // Initially the behaviour will be to clear out any existing shapes in the sheet when
                         // creating a new patriarch.
        agg.setPatriarch(patriarch);
        return patriarch;
    }

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            // Workbook has drawing stuff, but this sheet doesn't
            return null;
        }


        // Grab our aggregate record, and wire it up
        EscherAggregate agg = (EscherAggregate) _sheet.findFirstRecordBySid(EscherAggregate.sid);
        return agg;
    }

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     *  use this with simple drawings, otherwise call
     *  {@link HSSFSheet#createDrawingPatriarch()} and
     *  start from scratch!
     */
    public HSSFPatriarch getDrawingPatriarch() {
        EscherAggregate agg = getDrawingEscherAggregate();
        if(agg == null) return null;


        HSSFPatriarch patriarch = new HSSFPatriarch(this, agg);
        agg.setPatriarch(patriarch);


        // Have it process the records into high level objects
        //  as best it can do (this step may eat anything
        //  that isn't supported, you were warned...)
        agg.convertRecordsToUserModel();


        // Return what we could cope with
        return patriarch;
    }

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            if(!createIfMissing) {
                // None found, and not allowed to add in
                return -1;
            }


            EscherAggregate aggregate = new EscherAggregate( drawingManager );
            loc = findFirstRecordLocBySid(EscherAggregate.sid);
            if (loc == -1) {
                loc = findFirstRecordLocBySid( WindowTwoRecord.sid );
            } else {
                getRecords().remove(loc);
            }
            getRecords().add( loc, aggregate );
            return loc;
        }
        List<RecordBase> records = getRecords();
        EscherAggregate r = EscherAggregate.createAggregate( records, loc, drawingManager );
        int startloc = loc;
        while ( loc + 1 < records.size()
                && records.get( loc ) instanceof DrawingRecord
                && records.get( loc + 1 ) instanceof ObjRecord )
        {

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            if(!createIfMissing) {
                // None found, and not allowed to add in
                return -1;
            }


            EscherAggregate aggregate = new EscherAggregate( drawingManager );
            loc = findFirstRecordLocBySid(EscherAggregate.sid);
            if (loc == -1) {
                loc = findFirstRecordLocBySid( WindowTwoRecord.sid );
            } else {
                getRecords().remove(loc);
            }
            getRecords().add( loc, aggregate );
            return loc;
        }
        List<RecordBase> records = getRecords();
        EscherAggregate r = EscherAggregate.createAggregate( records, loc, drawingManager );
        int startloc = loc;
        while ( loc + 1 < records.size()
                && records.get( loc ) instanceof DrawingRecord
                && (records.get( loc + 1 ) instanceof ObjRecord ||
                    records.get( loc + 1 ) instanceof TextObjectRecord) )

View Full Code Here

        }


        //check if the cloned sheet has drawings
        int aggLoc = sheet.aggregateDrawingRecords(drawingManager, false);
        if(aggLoc != -1) {
            EscherAggregate agg = (EscherAggregate) sheet.findFirstRecordBySid(EscherAggregate.sid);
            EscherContainerRecord escherContainer = agg.getEscherContainer();
            if (escherContainer == null) {
                return;
            }


            EscherDggRecord dgg = drawingManager.getDgg();

View Full Code Here

        }


        //check if the cloned sheet has drawings
        int aggLoc = sheet.aggregateDrawingRecords(drawingManager, false);
        if(aggLoc != -1) {
            EscherAggregate agg = (EscherAggregate) sheet.findFirstRecordBySid(EscherAggregate.sid);
            EscherContainerRecord escherContainer = agg.getEscherContainer();
            if (escherContainer == null) {
                return;
            }


            EscherDggRecord dgg = drawingManager.getDgg();

View Full Code Here

     * to the standard output.
     */
    public void dumpDrawingRecords(boolean fat) {
        _sheet.aggregateDrawingRecords(_book.getDrawingManager(), false);


        EscherAggregate r = (EscherAggregate) getSheet().findFirstRecordBySid(EscherAggregate.sid);
        List<EscherRecord> escherRecords = r.getEscherRecords();
        PrintWriter w = new PrintWriter(System.out);
        for (Iterator<EscherRecord> iterator = escherRecords.iterator(); iterator.hasNext();) {
            EscherRecord escherRecord = iterator.next();
            if (fat) {
                System.out.println(escherRecord.toString());

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    public HSSFPatriarch createDrawingPatriarch() {
        // Create the drawing group if it doesn't already exist.
        _book.createDrawingGroup();


        _sheet.aggregateDrawingRecords(_book.getDrawingManager(), true);
        EscherAggregate agg = (EscherAggregate) _sheet.findFirstRecordBySid(EscherAggregate.sid);
        _patriarch = new HSSFPatriarch(this, agg);
        agg.clear();     // Initially the behaviour will be to clear out any existing shapes in the sheet when
                         // creating a new patriarch.
        agg.setPatriarch(_patriarch);
        return _patriarch;
    }

View Full Code Here

            // Workbook has drawing stuff, but this sheet doesn't
            return null;
        }


        // Grab our aggregate record, and wire it up
        EscherAggregate agg = (EscherAggregate) _sheet.findFirstRecordBySid(EscherAggregate.sid);
        return agg;
    }

View Full Code Here

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