/**
* Constructor.
*
* @param spec data specification
* @param rseq row sequence from spec's source table
*/
SimpleTupleSequence(DataSpec spec, RowSequence rseq) {
spec_ = spec;
reader_ = spec.createUserDataReader();
baseSeq_ = rseq;
int nc = spec.getCoordCount();
mappers_ = new DomainMapper[nc][];
for (int ic = 0; ic < nc; ic++) {
mappers_[ic] = getUserCoordMappers(spec, ic);
}
}
public TupleSequence getTupleSequence(DataSpec spec) {
try {
RowSequence rseq = spec.getSourceTable().getRowSequence();
return new SimpleTupleSequence(spec, rseq);
} catch (IOException e) {
logger_.log(Level.WARNING, "Error reading plot data", e);
return PlotUtil.EMPTY_TUPLE_SEQUENCE;
}
}
/**
* Utility method to work out the domain mappers for a given coordinate of a DataSpec. For the
* requested coord, it returns a mapper array with elements filled, in with any mapper known for
* the given user coordinates that has the sub-type appropriate for that coordinate.
*
* @param dataSpec data specification object
* @param icoord index of coordinate in <code>dataSpec</code>
* @return mapper array for decoding values of one coordinate of a data spec
*/
public static DomainMapper[] getUserCoordMappers(DataSpec dataSpec, int icoord) {
List<Class<? extends DomainMapper>> userDomains = dataSpec.getCoord(icoord).getUserDomains();
ValueInfo[] userInfos = dataSpec.getUserCoordInfos(icoord);
int nu = userDomains.size();
DomainMapper[] mappers = new DomainMapper[nu];
for (int iu = 0; iu < nu; iu++) {
Class reqClazz = userDomains.get(iu);
if (reqClazz != null) {
DomainMapper[] infoMappers = userInfos[iu].getDomainMappers();
for (int im = 0; im < infoMappers.length && mappers[iu] == null; im++) {
if (reqClazz.isInstance(infoMappers[im])) {
mappers[iu] = infoMappers[im];
}
}
}
}
return mappers;
}
public Object getObjectValue(int icol) {
try {
Object[] userCoords = reader_.getUserCoordValues(baseSeq_, irow_, icol);
Object value = spec_.getCoord(icol).userToStorage(userCoords, mappers_[icol]);
assert value != null;
return value;
} catch (IOException e) {
logError(e);
return null;
}
}
