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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 new_document(document, context)
res = value(document,"/*/inventory/inventory/text()", context).to_s
document.to_s.sub(/#{res}/, "#{res}A")
end
def update(container, xpath, context)
puts "Updating 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 "Updating document #{r.name}"
puts r
print "Return to continue : "
STDIN.gets
r.content = new_document(r, context)
container.update(r)
end
puts
rescue
puts "Query #{xpath} failed : #{$!}"
end
def retrieve(container, xpath, context)
puts "Retrieving document for '#{xpath}'"
print "Return to continue : "
STDIN.gets
results = container.query(xpath, context)
puts "\nFound #{results.size} documents matching the expression '#{xpath}'"
results.each do |r|
puts "Document #{r.name}"
puts r
print "Return to continue : "
STDIN.gets
end
puts
rescue
puts "Query #{xpath} failed : #{$!}"
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");
update(con, "/fruits:item/product[text() = 'Zapote Blanco']", context)
retrieve(con, "/fruits:item/product[text() = 'Zapote Blanco']", context)
txn.commit
end
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