void Selector::alterSchema(PointBuffer& buffer)
{
Schema const& original_schema = buffer.getSchema();
Schema new_schema = buffer.getSchema();
std::map<std::string, bool> const& ignoredMap = m_selectorFilter.getIgnoredMap();
// for (std::map<std::string, bool>::const_iterator i = ignoredMap.begin();
// i != ignoredMap.end(); ++i)
// {
// boost::optional<Dimension const&> d = original_schema.getDimensionOptional(i->first);
// if (d)
// {
// Dimension d2(*d);
// boost::uint32_t flags = d2.getFlags();
// if (i->second)
// d2.setFlags(flags | dimension::IsIgnored);
// new_schema.setDimension(d2);
// }
// }
//
schema::Map dimensions = original_schema.getDimensions();
schema::index_by_index const& dims = dimensions.get<schema::index>();
for (schema::index_by_index::const_iterator t = dims.begin();
t != dims.end();
++t)
{
std::map<std::string, bool>::const_iterator ignored = ignoredMap.find(t->getName());
if (ignored != ignoredMap.end())
{
if (ignored->second) // marked to be dropped
{
// set to ignored
Dimension d2(*t);
boost::uint32_t flags = d2.getFlags();
d2.setFlags(flags | dimension::IsIgnored);
new_schema.setDimension(d2);
}
}
else { // didn't find it in our map of specified dimensions
if (m_selectorFilter.doIgnoreUnspecifiedDimensions())
{
// set to ignored
Dimension d2(*t);
boost::uint32_t flags = d2.getFlags();
d2.setFlags(flags | dimension::IsIgnored);
new_schema.setDimension(d2);
}
}
}
buffer = PointBuffer(new_schema, buffer.getCapacity());
}
boost::uint64_t Writer::write(boost::uint64_t targetNumPointsToWrite)
{
if (!isInitialized())
{
throw pdal_error("stage not initialized");
}
boost::uint64_t actualNumPointsWritten = 0;
UserCallback* callback = getUserCallback();
do_callback(0.0, callback);
boost::scoped_ptr<StageSequentialIterator> iter(getPrevStage().createSequentialIterator());
if (!iter) throw pdal_error("Unable to obtain iterator from previous stage!");
// if we don't have an SRS, try to forward the one from the prev stage
if (m_spatialReference.empty()) m_spatialReference = getPrevStage().getSpatialReference();
writeBegin(targetNumPointsToWrite);
iter->readBegin();
const Schema& schema = getPrevStage().getSchema();
PointBuffer buffer(schema, m_chunkSize);
//
// The user has requested a specific number of points: proceed a
// chunk at a time until we reach that number. (If that number
// is 0, we proceed until no more points can be read.)
//
// If the user requests an interrupt while we're running, we'll throw.
//
while (true)
{
// have we hit the end already?
if (iter->atEnd()) break;
// rebuild our PointBuffer, if it needs to hold less than the default max chunk size
if (targetNumPointsToWrite != 0)
{
const boost::uint64_t numRemainingPointsToRead = targetNumPointsToWrite - actualNumPointsWritten;
const boost::uint64_t numPointsToReadThisChunk64 = std::min<boost::uint64_t>(numRemainingPointsToRead, m_chunkSize);
// this case is safe because m_chunkSize is a uint32
const boost::uint32_t numPointsToReadThisChunk = static_cast<boost::uint32_t>(numPointsToReadThisChunk64);
// we are reusing the buffer, so we may need to adjust the capacity for the last (and likely undersized) chunk
if (buffer.getCapacity() != numPointsToReadThisChunk)
{
buffer = PointBuffer(schema, numPointsToReadThisChunk);
}
}
// read...
iter->readBufferBegin(buffer);
const boost::uint32_t numPointsReadThisChunk = iter->readBuffer(buffer);
iter->readBufferEnd(buffer);
assert(numPointsReadThisChunk == buffer.getNumPoints());
assert(numPointsReadThisChunk <= buffer.getCapacity());
// have we reached the end yet?
if (numPointsReadThisChunk == 0) break;
// write...
writeBufferBegin(buffer);
const boost::uint32_t numPointsWrittenThisChunk = writeBuffer(buffer);
assert(numPointsWrittenThisChunk == numPointsReadThisChunk);
writeBufferEnd(buffer);
// update count
actualNumPointsWritten += numPointsWrittenThisChunk;
do_callback(actualNumPointsWritten, targetNumPointsToWrite, callback);
if (targetNumPointsToWrite != 0)
{
// have we done enough yet?
if (actualNumPointsWritten >= targetNumPointsToWrite) break;
}
// reset the buffer, so we can use it again
buffer.setNumPoints(0);
}
iter->readEnd();
writeEnd(actualNumPointsWritten);
assert((targetNumPointsToWrite == 0) || (actualNumPointsWritten <= targetNumPointsToWrite));
do_callback(100.0, callback);
return actualNumPointsWritten;
}