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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 delete(container, xpath, context)
puts "Deleting document for '#{xpath}'"
print "Return to continue : "
STDIN.gets
results = container.query(xpath, context)
puts "\nFound #{results.size} documents matching the expression '#{xpath}'"
results.each do |r|
puts "Deleting document #{value(r, '/*/product/text()', context)}"
container.delete(r)
puts "Deleted document #{value(r, '/*/product/text()', context)}"
end
puts
rescue
puts "Query #{xpath} failed : #{$!}"
end
def confirm(container, xpath, context)
puts "Conforming the delete document"
puts "The query : '#{xpath}' should get result set size 0"
if container.query(xpath, context).size == 0
puts "Deletion confirmed."
else
puts "Document deletion failed."
end
end
options = {'home' => 'env', 'container' => 'name.xml'}
BDB::Env.new(options['home'], BDB::INIT_TRANSACTION).begin do |txn|
con = txn.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");
delete(con, "/fruits:item[product = 'Mabolo']", context)
confirm(con, "/fruits:item[product = 'Mabolo']", context)
txn.commit
end
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