public static Append toAppend(final MutationProto proto, final CellScanner cellScanner)
throws IOException {
MutationType type = proto.getMutateType();
assert type == MutationType.APPEND : type.name();
byte [] row = proto.hasRow()? proto.getRow().toByteArray(): null;
Append append = null;
int cellCount = proto.hasAssociatedCellCount()? proto.getAssociatedCellCount(): 0;
if (cellCount > 0) {
// The proto has metadata only and the data is separate to be found in the cellScanner.
if (cellScanner == null) {
throw new DoNotRetryIOException("Cell count of " + cellCount + " but no cellScanner: " +
toShortString(proto));
}
for (int i = 0; i < cellCount; i++) {
if (!cellScanner.advance()) {
throw new DoNotRetryIOException("Cell count of " + cellCount + " but at index " + i +
" no cell returned: " + toShortString(proto));
}
Cell cell = cellScanner.current();
if (append == null) {
append = new Append(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength());
}
append.add(KeyValueUtil.ensureKeyValue(cell));
}
} else {
append = new Append(row);
for (ColumnValue column: proto.getColumnValueList()) {
byte[] family = column.getFamily().toByteArray();
for (QualifierValue qv: column.getQualifierValueList()) {
byte[] qualifier = qv.getQualifier().toByteArray();
if (!qv.hasValue()) {
throw new DoNotRetryIOException(
"Missing required field: qualifer value");
}
byte[] value = qv.getValue().toByteArray();
append.add(family, qualifier, value);
}
}
}
append.setDurability(toDurability(proto.getDurability()));
for (NameBytesPair attribute: proto.getAttributeList()) {
append.setAttribute(attribute.getName(), attribute.getValue().toByteArray());
}
return append;
}