Examples with EscherSerializationListener org.apache.poi.ddf.EscherSerializationListener used on opensource projects

Example 1 with EscherSerializationListener

use of org.apache.poi.ddf.EscherSerializationListener in project poi by apache.

the class EscherAggregate method serialize.

/**
     * Serializes this aggregate to a byte array.  Since this is an aggregate
     * record it will effectively serialize the aggregated records.
     *
     * @param offset The offset into the start of the array.
     * @param data   The byte array to serialize to.
     * @return The number of bytes serialized.
     */
public int serialize(int offset, byte[] data) {
    // Determine buffer size
    List<EscherRecord> records = getEscherRecords();
    int size = getEscherRecordSize(records);
    byte[] buffer = new byte[size];
    // Serialize escher records into one big data structure and keep note of ending offsets.
    final List<Integer> spEndingOffsets = new ArrayList<Integer>();
    final List<EscherRecord> shapes = new ArrayList<EscherRecord>();
    int pos = 0;
    for (Object record : records) {
        EscherRecord e = (EscherRecord) record;
        pos += e.serialize(pos, buffer, new EscherSerializationListener() {

            public void beforeRecordSerialize(int offset, short recordId, EscherRecord record) {
            }

            public void afterRecordSerialize(int offset, short recordId, int size, EscherRecord record) {
                if (recordId == EscherClientDataRecord.RECORD_ID || recordId == EscherTextboxRecord.RECORD_ID) {
                    spEndingOffsets.add(offset);
                    shapes.add(record);
                }
            }
        });
    }
    shapes.add(0, null);
    spEndingOffsets.add(0, 0);
    // Split escher records into separate MSODRAWING and OBJ, TXO records.  (We don't break on
    // the first one because it's the patriach).
    pos = offset;
    int writtenEscherBytes = 0;
    int i;
    for (i = 1; i < shapes.size(); i++) {
        int endOffset = spEndingOffsets.get(i) - 1;
        int startOffset;
        if (i == 1)
            startOffset = 0;
        else
            startOffset = spEndingOffsets.get(i - 1);
        byte[] drawingData = new byte[endOffset - startOffset + 1];
        System.arraycopy(buffer, startOffset, drawingData, 0, drawingData.length);
        pos += writeDataIntoDrawingRecord(drawingData, writtenEscherBytes, pos, data, i);
        writtenEscherBytes += drawingData.length;
        // Write the matching OBJ record
        Record obj = shapeToObj.get(shapes.get(i));
        pos += obj.serialize(pos, data);
        if (i == shapes.size() - 1 && endOffset < buffer.length - 1) {
            drawingData = new byte[buffer.length - endOffset - 1];
            System.arraycopy(buffer, endOffset + 1, drawingData, 0, drawingData.length);
            pos += writeDataIntoDrawingRecord(drawingData, writtenEscherBytes, pos, data, i);
        }
    }
    if ((pos - offset) < buffer.length - 1) {
        byte[] drawingData = new byte[buffer.length - (pos - offset)];
        System.arraycopy(buffer, (pos - offset), drawingData, 0, drawingData.length);
        pos += writeDataIntoDrawingRecord(drawingData, writtenEscherBytes, pos, data, i);
    }
    for (NoteRecord noteRecord : tailRec.values()) {
        Record rec = (Record) noteRecord;
        pos += rec.serialize(pos, data);
    }
    int bytesWritten = pos - offset;
    if (bytesWritten != getRecordSize())
        throw new RecordFormatException(bytesWritten + " bytes written but getRecordSize() reports " + getRecordSize());
    return bytesWritten;
}

Example 2 with EscherSerializationListener

use of org.apache.poi.ddf.EscherSerializationListener in project poi by apache.

the class EscherAggregate method getRecordSize.

/**
     * @return record size, including header size of obj, text, note, drawing, continue records
     */
public int getRecordSize() {
    // To determine size of aggregate record we have to know size of each DrawingRecord because if DrawingRecord
    // is split into several continue records we have to add header size to total EscherAggregate size
    int continueRecordsHeadersSize = 0;
    // Determine buffer size
    List<EscherRecord> records = getEscherRecords();
    int rawEscherSize = getEscherRecordSize(records);
    byte[] buffer = new byte[rawEscherSize];
    final List<Integer> spEndingOffsets = new ArrayList<Integer>();
    int pos = 0;
    for (EscherRecord e : records) {
        pos += e.serialize(pos, buffer, new EscherSerializationListener() {

            public void beforeRecordSerialize(int offset, short recordId, EscherRecord record) {
            }

            public void afterRecordSerialize(int offset, short recordId, int size, EscherRecord record) {
                if (recordId == EscherClientDataRecord.RECORD_ID || recordId == EscherTextboxRecord.RECORD_ID) {
                    spEndingOffsets.add(offset);
                }
            }
        });
    }
    spEndingOffsets.add(0, 0);
    for (int i = 1; i < spEndingOffsets.size(); i++) {
        if (i == spEndingOffsets.size() - 1 && spEndingOffsets.get(i) < pos) {
            continueRecordsHeadersSize += 4;
        }
        if (spEndingOffsets.get(i) - spEndingOffsets.get(i - 1) <= RecordInputStream.MAX_RECORD_DATA_SIZE) {
            continue;
        }
        continueRecordsHeadersSize += ((spEndingOffsets.get(i) - spEndingOffsets.get(i - 1)) / RecordInputStream.MAX_RECORD_DATA_SIZE) * 4;
    }
    int drawingRecordSize = rawEscherSize + (shapeToObj.size()) * 4;
    if (rawEscherSize != 0 && spEndingOffsets.size() == 1) /**EMPTY**/
    {
        continueRecordsHeadersSize += 4;
    }
    int objRecordSize = 0;
    for (Record r : shapeToObj.values()) {
        objRecordSize += r.getRecordSize();
    }
    int tailRecordSize = 0;
    for (NoteRecord noteRecord : tailRec.values()) {
        tailRecordSize += noteRecord.getRecordSize();
    }
    return drawingRecordSize + objRecordSize + tailRecordSize + continueRecordsHeadersSize;
}