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read observations

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This commit is contained in:
John Bintz 2011-03-16 10:22:59 -04:00
parent b0cc66969a
commit a5498624a2
7 changed files with 161 additions and 37 deletions
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1
lib/avm/image.rb
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@ -116,6 +116,7 @@ module AVM
image = new(options)
image.creator.from_xml(self, document)
Observation.from_xml(image, document)
image
end

40
lib/avm/observation.rb
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@ -1,12 +1,14 @@
module AVM
class Observation
AVM_SINGLE_FIELDS = %w{Facility Instrument Spectral.ColorAssignment Spectral.Band Spectral.Bandpass Spectral.CentralWavelength Spectral.Notes Temporal.StartTime Temporal.IntegrationTime DatasetID}
AVM_SINGLE_METHODS = [ :facility, :instrument, :color_assignment, :band, :bandpass, :wavelength, :notes, :string_start_time, :integration_time, :dataset_id ]
AVM_SINGLE_FIELDS = %w{Facility Instrument Spectral.ColorAssignment Spectral.Band Spectral.Bandpass Spectral.CentralWavelength Temporal.StartTime Temporal.IntegrationTime DatasetID}
AVM_SINGLE_METHODS = [ :facility, :instrument, :color_assignment, :band, :bandpass, :wavelength, :string_start_time, :integration_time, :dataset_id ]
AVM_SINGLES = AVM_SINGLE_FIELDS.zip(AVM_SINGLE_METHODS)
attr_reader :image, :options
def initialize(image, options = {})
options[:start_time] = options[:string_start_time] if options[:string_start_time]
@image, @options = image, options
end
@ -14,12 +16,44 @@ module AVM
@options[method]
end
def wavelength
@options[:wavelength] ? @options[:wavelength].to_f : nil
end
def start_time
(Time.parse(@options[:start_time]) rescue nil)
end
def string_start_time
if start_time
start_time.strftime('%Y-%m-%dT%H:%M')
else
nil
end
end
def self.from_xml(image, document)
observation_parts = {}
document.get_refs do |refs|
AVM_SINGLES.each do |name, method|
if node = refs[:avm].at_xpath(".//avm:#{name}")
observation_parts[method] = node.text.split(',').collect(&:strip)
end
end
end
begin
observation = {}
observation_parts.each do |method, parts|
if part = parts.shift
observation[method] = part if part != '-'
end
end
image.create_observation(observation) if !observation.empty?
end while !observation.empty?
end
def self.add_to_document(document, observations)
@ -27,7 +61,7 @@ module AVM
AVM_SINGLES.each do |name, method|
observations.each do |observation|
field_values[name] ||= []
field_values[name] << observation.send(method)
field_values[name] << (observation.send(method) || '-')
end
end

2
spec/avm/image_spec.rb
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@ -20,6 +20,8 @@ describe AVM::Image do
let(:redshift) { 'Redshift' }
let(:light_years) { 'Light years' }
it "should have spectral notes"
def self.with_all_options
let(:options) { {
:title => title,

114
spec/avm/observation_spec.rb
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@ -14,7 +14,6 @@ describe AVM::Observation do
let(:band) { 'em.opt' }
let(:bandpass) { 'B' }
let(:wavelength) { 2.5 }
let(:notes) { 'Notes' }
let(:start_time) { '2010-01-01' }
let(:start_time_string) { '2010-01-01T00:00' }
let(:integration_time) { '300' }
@ -27,32 +26,108 @@ describe AVM::Observation do
:band => band,
:bandpass => bandpass,
:wavelength => wavelength,
:notes => notes,
:start_time => start_time,
:integration_time => integration_time,
:dataset_id => dataset_id,
} }
context 'defaults' do
let(:second_facility) { 'Chandra' }
let(:second_instrument) { 'X-Ray' }
let(:second_color_assignment) { 'Green' }
let(:second_band) { 'em.x-ray' }
let(:second_bandpass) { 'C' }
let(:second_wavelength) { nil }
let(:second_start_time) { '2010-01-02' }
let(:second_start_time_string) { '2010-01-02T00:00' }
let(:second_integration_time) { '400' }
let(:second_dataset_id) { '23456' }
let(:second_options) { {
:facility => second_facility,
:instrument => second_instrument,
:color_assignment => second_color_assignment,
:band => second_band,
:bandpass => second_bandpass,
:wavelength => second_wavelength,
:start_time => second_start_time,
:integration_time => second_integration_time,
:dataset_id => second_dataset_id,
} }
def self.check_defaults
its(:facility) { should == facility }
its(:instrument) { should == instrument }
its(:color_assignment) { should == color_assignment }
its(:band) { should == band }
its(:bandpass) { should == bandpass }
its(:wavelength) { should == wavelength }
its(:notes) { should == notes }
its(:start_time) { should == Time.parse(start_time) }
its(:integration_time) { should == integration_time }
its(:dataset_id) { should == dataset_id }
end
context 'defaults' do
check_defaults
end
describe '.from_xml' do
let(:image) { AVM::Image.from_xml(File.read(file_path)) }
let(:observations) { image.observations }
subject { observations }
context 'no observations' do
let(:file_path) { 'spec/sample_files/observation/none.xmp' }
it { should == [] }
end
context 'one observation' do
let(:file_path) { 'spec/sample_files/observation/one.xmp' }
its(:length) { should == 1 }
context 'first observation' do
subject { observations.first }
check_defaults
end
end
context 'two observations' do
let(:file_path) { 'spec/sample_files/observation/two.xmp' }
its(:length) { should == 2 }
context 'first observation' do
subject { observations.first }
check_defaults
end
context 'second observation' do
subject { observations.last }
its(:facility) { should == second_facility }
its(:instrument) { should == second_instrument }
its(:color_assignment) { should == second_color_assignment }
its(:band) { should == second_band }
its(:bandpass) { should == second_bandpass }
its(:wavelength) { should == second_wavelength }
its(:start_time) { should == Time.parse(second_start_time) }
its(:integration_time) { should == second_integration_time }
its(:dataset_id) { should == second_dataset_id }
end
end
end
describe '.add_to_document' do
let(:xml) { image.to_xml }
let(:avm) { xml.at_xpath('//rdf:Description[@rdf:about="AVM"]') }
context 'none' do
it "should not have any observation information" do
%w{Facility Instrument Spectral.ColorAssignment Spectral.Band Spectral.Bandpass Spectral.CentralWavelength Spectral.Notes Temporal.StartTime Temporal.IntegrationTime DatasetID}.each do |name|
%w{Facility Instrument Spectral.ColorAssignment Spectral.Band Spectral.Bandpass Spectral.CentralWavelength Temporal.StartTime Temporal.IntegrationTime DatasetID}.each do |name|
avm.at_xpath("//avm:#{name}").should be_nil
end
end
@ -69,7 +144,6 @@ describe AVM::Observation do
'Spectral.Band' => band,
'Spectral.Bandpass' => bandpass,
'Spectral.CentralWavelength' => wavelength,
'Spectral.Notes' => notes,
'Temporal.StartTime' => start_time_string,
'Temporal.IntegrationTime' => integration_time,
'DatasetID' => dataset_id
@ -82,30 +156,6 @@ describe AVM::Observation do
context 'two' do
let(:second_observation) { image.create_observation(second_options) }
let(:second_facility) { 'Chandra' }
let(:second_instrument) { 'X-Ray' }
let(:second_color_assignment) { 'Green' }
let(:second_band) { 'em.x-ray' }
let(:second_bandpass) { 'C' }
let(:second_wavelength) { nil }
let(:second_notes) { 'More Notes' }
let(:second_start_time) { '2010-01-02' }
let(:second_start_time_string) { '2010-01-02T00:00' }
let(:second_integration_time) { '400' }
let(:second_dataset_id) { '23456' }
let(:second_options) { {
:facility => second_facility,
:instrument => second_instrument,
:color_assignment => second_color_assignment,
:band => second_band,
:bandpass => second_bandpass,
:wavelength => second_wavelength,
:notes => second_notes,
:start_time => second_start_time,
:integration_time => second_integration_time,
:dataset_id => second_dataset_id,
} }
before { observation ; second_observation }
@ -116,8 +166,7 @@ describe AVM::Observation do
'Spectral.ColorAssignment' => [ color_assignment, second_color_assignment ].join(','),
'Spectral.Band' => [ band, second_band ].join(','),
'Spectral.Bandpass' => [ bandpass, second_bandpass ].join(','),
'Spectral.CentralWavelength' => [ wavelength, second_wavelength ].join(','),
'Spectral.Notes' => [ notes, second_notes ].join(','),
'Spectral.CentralWavelength' => [ wavelength, second_wavelength || '-' ].join(','),
'Temporal.StartTime' => [ start_time_string, second_start_time_string ].join(','),
'Temporal.IntegrationTime' => [ integration_time, second_integration_time ].join(','),
'DatasetID' => [ dataset_id, second_dataset_id ].join(',')
@ -125,7 +174,6 @@ describe AVM::Observation do
avm.at_xpath("//avm:#{name}").text.should == value.to_s
end
end
end
end
end

5
spec/sample_files/observation/none.xmp Normal file
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@ -0,0 +1,5 @@
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 4.2.2-c063 53.352624, 2008/07/30-18:05:41 ">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
</rdf:RDF>
</x:xmpmeta>

17
spec/sample_files/observation/one.xmp Normal file
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@ -0,0 +1,17 @@
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 4.2.2-c063 53.352624, 2008/07/30-18:05:41 ">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about=""
xmlns:avm="http://www.communicatingastronomy.org/avm/1.0/">
<avm:Facility>HST</avm:Facility>
<avm:Instrument>ACS</avm:Instrument>
<avm:Spectral.ColorAssignment>Blue</avm:Spectral.ColorAssignment>
<avm:Spectral.Band>em.opt</avm:Spectral.Band>
<avm:Spectral.Bandpass>B</avm:Spectral.Bandpass>
<avm:Spectral.CentralWavelength>2.5</avm:Spectral.CentralWavelength>
<avm:Temporal.StartTime>2010-01-01T00:00</avm:Temporal.StartTime>
<avm:Temporal.IntegrationTime>300</avm:Temporal.IntegrationTime>
<avm:DatasetID>12345</avm:DatasetID>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>

17
spec/sample_files/observation/two.xmp Normal file
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@ -0,0 +1,17 @@
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 4.2.2-c063 53.352624, 2008/07/30-18:05:41 ">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about=""
xmlns:avm="http://www.communicatingastronomy.org/avm/1.0/">
<avm:Facility>HST,Chandra</avm:Facility>
<avm:Instrument>ACS,X-Ray</avm:Instrument>
<avm:Spectral.ColorAssignment>Blue,Green</avm:Spectral.ColorAssignment>
<avm:Spectral.Band>em.opt,em.x-ray</avm:Spectral.Band>
<avm:Spectral.Bandpass>B,C</avm:Spectral.Bandpass>
<avm:Spectral.CentralWavelength>2.5,-</avm:Spectral.CentralWavelength>
<avm:Temporal.StartTime>2010-01-01T00:00,2010-01-02</avm:Temporal.StartTime>
<avm:Temporal.IntegrationTime>300,400</avm:Temporal.IntegrationTime>
<avm:DatasetID>12345,23456</avm:DatasetID>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>