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#!/usr/bin/ruby -I../.. -I../../../src
require 'bdbxml'
def value(document, xpath, context)
context.returntype = BDB::XML::Context::Values
result = document.query(xpath, context).to_a
if result.size != 1
raise "Expected 1 got #{result.size}"
end
result[0]
ensure
context.returntype = BDB::XML::Context::Documents
end
def details(container, xpath, context)
puts "Exercising query '#{xpath}'"
print "Return to continue : "
STDIN.gets
results = container.query(xpath, context)
puts "\n\tProduct : Price : Inventory Level"
results.each do |r|
item = value(r, "/*/product/text()", context)
price = value(r, "/*/inventory/price/text()", context)
inventory = value(r, "/*/inventory/inventory/text()", context)
puts "\t#{item} : #{price} : #{inventory}"
end
puts
rescue
puts "Query #{xpath} failed : #{$!}"
end
options = {'home' => 'env', 'container' => 'name.xml'}
con = BDB::Env.new(options['home'], BDB::INIT_LOMP).
open_xml(options['container'])
context = BDB::XML::Context.new
context.set_namespace("fruits", "http://groceryItem.dbxml/fruits")
context.set_namespace("vegetables", "http://groceryItem.dbxml/vegetables")
context.set_namespace("desserts", "http://groceryItem.dbxml/desserts");
details(con, "/fruits:item/product[text() = 'Zulu Nut']", context)
details(con, "/vegetables:item/product[starts-with(text(),'A')]", context)
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