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Contents
module Geoblacklight
module MetadataTransformer
##
# Abstract class for transforming geospatial metadata
class Base
##
# @param [GeoCombine::Metadata] metadata metadata Object
# @see GeoCombine::Metadata
def initialize(metadata)
@metadata = metadata
# Access the Nokogiri::XML Document from the metadata Object
fail EmptyMetadataError, 'Failed to retrieve the metadata' if @metadata.blank?
end
##
# Returns HTML for the metadata transformed into HTML using GeoCombine
# @see GeoCombine::Metadata#to_html
# @return [String] the transformed metadata in the HTML
def transform
cleaned_metadata.to_html
rescue => e
raise TransformError, e.message
end
private
##
# Clean top-level HTML elements from GeoCombine HTML Documents (e. g. <html> and <body>)
# @return [Nokogiri::XML::Document] the Nokogiri XML Document for the cleaned HTML
def cleaned_metadata
transformed_doc = Nokogiri::XML(@metadata.to_html)
if transformed_doc.xpath('//body').children.empty?
fail TransformError,\
'Failed to extract the <body> child elements from the transformed metadata'
end
transformed_doc.xpath('//body').children
rescue => e
raise TransformError, e.message
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems