class GDAL::Utils::Helpers::DatasetList
A basic wrapper for C Array of dataset handlers (e.g. GDALDatasetH *pahSrcDS).
@private @note This class is intended only to be used internally in ffi-gdal. It’s API may change.
Do not use this class directly.
Attributes
c_pointer[R]
@return [FFI::Pointer] C pointer to the Array of dataset handlers (e.g. GDALDatasetH *pahSrcDS).
datasets[R]
@return [Array<GDAL::Dataset>] List of datasets.
Public Class Methods
new(datasets: [])
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@param datasets [Array<GDAL::Dataset>] List of datasets.
# File lib/gdal/utils/helpers/dataset_list.rb, line 19 def initialize(datasets: []) @datasets = datasets @c_pointer = datasets_pointer end
Public Instance Methods
count()
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@return [Integer] The number of datasets in the list.
# File lib/gdal/utils/helpers/dataset_list.rb, line 25 def count dataset_pointers.count end
Private Instance Methods
dataset_pointers()
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# File lib/gdal/utils/helpers/dataset_list.rb, line 31 def dataset_pointers @dataset_pointers ||= datasets.map(&:c_pointer) end
datasets_pointer()
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# File lib/gdal/utils/helpers/dataset_list.rb, line 35 def datasets_pointer ::FFI::MemoryPointer .new(:pointer, count) .write_array_of_pointer(dataset_pointers) end