Class: Map::Gdal::GdalInfoService

Inherits:
Object
  • Object
show all
Includes:
Base
Defined in:
lib/map/gdal/gdal_info_service.rb

Instance Attribute Summary collapse

Attributes included from Base

#files_to_clean

Instance Method Summary collapse

Methods included from Base

#add_to_clean, #clean, #gdal_running?, #get_file_name_with_path, #get_layer_name, #get_path_to_temp_file, #options_to_command_line, #run_command, #store_kml, #tmp_file

Constructor Details

#initialize(file) ⇒ GdalInfoService

Returns a new instance of GdalInfoService.



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# File 'lib/map/gdal/gdal_info_service.rb', line 7

def initialize(file)
  raise 'File does not exist' unless File.exist?(file)
  @file = file
end

Instance Attribute Details

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/map/gdal/gdal_info_service.rb', line 6

def file
  @file
end

Instance Method Details

#call(options = {}) ⇒ Object 



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# File 'lib/map/gdal/gdal_info_service.rb', line 29

def call(options = {})
  run_command(%{gdalinfo #{options_to_command_line(options)} "#{file}"})
end

#get_json(options = {}) ⇒ Object 



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# File 'lib/map/gdal/gdal_info_service.rb', line 20

def get_json(options = {})
  result = call(options.merge({
    mm: '',
    json: ''
  }))

  JSON.parse(result)
end

#same_min_max? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/map/gdal/gdal_info_service.rb', line 12

def same_min_max?
  json_info = get_json
  min = json_info['bands'].first['computedMin'].to_f
  max = json_info['bands'].first['computedMax'].to_f

  min == max
end