ruby_test.rb

This is a simple example that demonstrate how to use the Zorba XQuery Engine to create, compile, and execute queries.

# Copyright 2006-2008 The FLWOR Foundation.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
# http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

require '/home/pfkeb/zorba/branches/0.9.5-rc1/build/swig/ruby/zorba_api'

def example1(zorba)
  xquery = zorba.compileQuery("1+2")
  print xquery.execute()
  xquery.destroy()
end

def example2(zorba)
  xquery = zorba.compileQuery("(1,2,3,4,5)")
  iter = xquery.iterator()
  iter.open()
  item = Zorba_api::Item::createEmptyItem()
  while iter.next(item) do
    print item.getStringValue()
    print "\n"
  end
  iter.close()
  iter.destroy()
  xquery.destroy()
end

def example3(zorba)
  begin
    xquery = zorba.compileQuery("1 div 0")
    print xquery.execute()
  rescue RuntimeError => e
    print e 
  ensure
    xquery.destroy()
  end
end

def example4(zorba)
  begin
    xquery = zorba.compileQuery("for $i in (1,2,")
    print xquery.execute()
  rescue RuntimeError => e
    print e 
  ensure
    if not xquery.nil? then
      xquery.destroy()
    end
  end
end

def example5(zorba)
  dataManager = zorba.getXmlDataManager()
  dataManager.loadDocument("books.xml", "<books><book>Book 1</book><book>Book 2</book></books>")
  xquery = zorba.compileQuery("doc('books.xml')//book")
  print xquery.execute()
  xquery.destroy()
end

def example6(zorba)
  dataManager = zorba.getXmlDataManager()
  dataManager.loadDocument("books.xml", "<books><book>Book 1</book><book>Book 2</book></books>")
  xquery1 = zorba.compileQuery("insert node <book>Book 3</book> into doc('books.xml')/books")
  if xquery1.isUpdateQuery() then
    xquery1.applyUpdates()
  end
  xquery2 = zorba.compileQuery("doc('books.xml')//book")
  print xquery2.execute()
  xquery1.destroy()
  xquery2.destroy()
end

store = Zorba_api::InMemoryStore.getInstance()
zorba = Zorba_api::Zorba.getInstance(store)

print "Example1:\n"
example1(zorba)
print "\n\n"

print "Example2:\n"
example2(zorba)
print "\n"

print "Example3:\n"
example3(zorba)
print "\n\n"

print "Example4:\n"
example4(zorba)
print "\n\n"

print "Example5:\n"
example5(zorba)
print "\n\n"

print "Example6:\n"
example6(zorba)
print "\n\n"

zorba.shutdown()
Zorba_api::InMemoryStore.shutdown(store)