DRB Extractor
Project description
DRB Extractor
Extractor
An extractor as its name suggests allowing to extract information/data from a node. An extractor is defined by a YAML content. Three extractor types exists currently:
Constant
This extractor nothing from the node but give always the same value.
constant: 42
Some string values are automatically converted to a specific Python type:
Value | Python type |
---|---|
2022-01-01 | datatime.date |
2022-01-01T00:00:00.000Z | datatime.datetime |
XQuery
This extractor allowing to extract data from the node via an XQuery script. See more details about XQuery.
xquery: |
data(./manifest.safe/XFDU/metadataSection/
metadataObject[@ID="generalProductInformation"]/metadataWrap/xmlData/
*[matches(name(),"standAloneProductInformation|generalProductInformation")]/
noiseCompressionType)
Python
The Python extractor allowing to extract data from a node via a Python script.
Where the node
variable represents the current node.
python: |
return node['DATASTRIP'][0]['MTD_DS.xml']['Level-1C_DataStrip_ID']
['General_Info']['Datatake_Info'].get_attribute('datatakeIdentifier')
Script
The Script extractor allowing to extract data from a node via a Python method. A DrbNode given in argument of the extract method will be put in argument.
script: package.module:function1 # execute complex python script to generate the preview
example:
drbItemClass: aff2191f-5b06-4121-a9fa-f3d93f6c6331
variables:
- name: node_platform
xquery: |
./manifest.safe/XFDU/metadataSection/metadataObject[@ID="platform"]/
metadataWrap/xmlData/platform
metadata:
- name: 'platformName'
constant: 'Sentinel-1'
- name: 'SatelliteNumber'
xquery: |
declare variable $node_platform external;
data($node_platform/number)
- name: 'platformIdentifier'
python: |
return node_platform['nssdcIdentifier'].value
- name: 'resolutionDetail'
python: |
resolution = node.name[10:11]
if resolution == 'F':
return 'Full'
elif resolution == 'H':
return 'High'
elif resolution == 'M':
return 'Medium'
return None
- name: 'index_340_380'
script: package.module:function1
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