IteratorBase::IteratorBase(const pdal::drivers::oci::Reader& reader)
: m_initialQueryStatement(Statement())
, m_at_end(false)
, m_at_end_of_blocks(false)
, m_at_end_of_clouds(false)
, m_block(BlockPtr(new Block(reader.getConnection())))
, m_active_cloud_id(0)
, m_oracle_buffer(BufferPtr())
, m_buffer_position(0)
, m_orientation(schema::POINT_INTERLEAVED)
, m_reader(reader)
{
m_querytype = reader.getQueryType();
if (m_querytype == QUERY_SDO_PC)
{
m_initialQueryStatement = getNextCloud(m_block, m_active_cloud_id);
}
if (m_querytype == QUERY_SDO_BLK_PC_VIEW)
{
m_initialQueryStatement = reader.getInitialQueryStatement();
m_block = reader.getBlock();
m_active_cloud_id = m_initialQueryStatement->GetInteger(&m_block->pc->pc_id);
}
return;
}
BlockPtr LocalBlockReader::getBlock(const uint64_t blockStart, const uint64_t numBytes)
{
if(!configured_) {
throw std::runtime_error("need to configure");
}
if(numBytes == 0) {
throw std::runtime_error("requested 0 numBytes");
}
if (blockStart >= fileSize_) {
// return empty buffer
boost::shared_ptr<std::vector<uint8_t> > v = boost::shared_ptr<std::vector<uint8_t> >(new std::vector<u_int8_t>);
BlockPtr block = BlockPtr(new Block(v));
return block;
}
//DLOG(INFO) << "blockStart: " << blockStart << " numBytes: " << numBytes;
f_->seek(blockStart);
boost::shared_ptr<std::vector<uint8_t> > v = boost::shared_ptr<std::vector<uint8_t> >(new std::vector<u_int8_t>);
v->resize(numBytes);
size_t bytesRead = f_->read(v->data(), numBytes);
if(bytesRead != numBytes) {
//error
switch(bytesRead) {
case 0: {
if(f_->eof()) throw std::runtime_error("eof");
else throw std::runtime_error("error reading");
break;
}
default: {
throw std::runtime_error("read less bytes than expected");
}
}
}
BlockPtr block = BlockPtr(new Block(v));
return block;
}
