#format wiki
#language en
#pragma section-numbers off
= Jython examples using Java XML classes =
DocumentationAndEducation
<<TableOfContents>>
----
Examples related to Java XML classes using Jython will be here.
'''List of pages in this category:'''
* Something simple using dom4j
* Something else simple Jdom
* Others ?
* and of course Java SDK
== Element tree ==
Here is a simple example. info on element tree is at http://effbot.org/zone/element-index.htm
Download element tree from http://effbot.org/downloads/
{{{
from elementtree import ElementTree as ET
root = ET.Element("html")
head = ET.SubElement(root, "head")
title = ET.SubElement(head, "title")
title.text = "Page Title"
body = ET.SubElement(root, "body")
body.set("bgcolor", "#ffffff")
body.text = "Hello, World!"
tree = ET.ElementTree(root)
tree.write("page.xhtml")
import sys
tree.write(sys.stdout)
}}}
which produces:
{{{
<html><head><title>Page Title</title></head><body bgcolor="#ffffff">Hello, World!</body></html>
}}}
== dom4j ==
This example requires http://www.dom4j.org/ the example below was tested with v1.6.1 download it and put it in you classpath.
This was posted to the Jython-users mailing list by Claude Falbriard Sep 14, 2007,
This simply prints out a xml tree. change line 39 to a valid xml filename.
{{{
import sys
from org.dom4j.io import SAXReader
def show_indent(level):
return ' ' * level
def show_node(node, level):
"""Display one node in the DOM tree.
"""
if node.getNodeType() == node.ELEMENT_NODE:
name = node.getName()
print '%sNode: %s' % (show_indent(level), name, )
attrs = node.attributes()
for attr in attrs:
aName = attr.getQualifiedName()
aValue = attr.getValue()
print ' %sAttr -- %s: %s' % (show_indent(level), aName,aValue,)
if node.getName() == 'RefNum':
val = node.getText()
print '%stitle: "%s"' % (show_indent(level+1), val, )
elif node.getName() == 'link':
val = node.getText()
print '%slink : "%s"' % (show_indent(level+1), val, )
if node.getNodeType() == node.TEXT_NODE:
print '**** text node'
def show_tree(node, level):
show_node(node, level)
level1 = level + 1
children = node.elements()
for child in children:
show_tree(child, level1)
def test():
print 'Version: %s' % (sys.version, )
reader = SAXReader()
doc = reader.read('example.xml')
root = doc.getRootElement()
show_tree(root, 0)
def main():
test()
if __name__ == '__main__':
main()
}}}
== Using Jython and jaxen XPath ==
From: Frank Cohen
Sent: Tuesday, June 03, 2008 10:34 PM
I needed to write a SOAP-based Web service to show off the SOAP
testing capabilities for PushToTest TestMaker. I wanted to use XPath
expressions to change the search expressions easily over time. I chose
to use Jaxen and Xerces APIs. Figuring this out in Java wound up
taking a long time - all those visits to change-compile-run-check
land! So I broke out my trusty Jython (embedded in TestMaker) and
wrote the following script.
I like example code. So I am posting this here to help anyone else
that needs to do XPath expressions.
{{{
from java.io import ByteArrayInputStream
from org.apache.axis.utils import XMLUtils
from org.apache.axis.message import MessageElement
from java.lang import String
from org.jaxen.dom import DOMXPath
mystring = '''<change_price_response>
<Inventory>
<Product number="1000">
<InStock>
<part quantity="2" location="10"/>
<part quantity="100" location="11"/>
<part quantity="10" location="12"/>
</InStock>
<OnOrder>
<order customer="100323" amount="2" ordernumber="988898"/>
<order customer="100115" amount="1" ordernumber="988899"/>
<order customer="100116" amount="10" ordernumber="988900"/>
</OnOrder>
<prices>
<price amount="100" minquantity="1"/>
<price amount="85" minquantity="10"/>
<price amount="75" minquantity="20"/>
</prices>
</Product>
</Inventory>
</change_price_response>'''
soapElementAsString = String( mystring )
myis = ByteArrayInputStream( soapElementAsString.getBytes() )
respdoc = XMLUtils.newDocument( myis )
myrq = '''<change_price>
<Product number="1000">
<Operation type="AddStock" quantity="100" location="11"/>
</Product>
</change_price>'''
soapElementAsString = String( myrq )
myis2 = ByteArrayInputStream( soapElementAsString.getBytes() )
rqdoc = XMLUtils.newDocument( myis2 )
#rqme = MessageElement( rqdoc.getDocumentElement() )
xpath1 = DOMXPath( "//Product" )
product_number = int( xpath1.selectSingleNode( rqdoc ).getAttribute("number") )
print "fc1", xpath1.selectSingleNode( rqdoc ).getClass().getName()
xpath2 = DOMXPath( "//Operation[@location]" )
xpath2 = DOMXPath( "//Operation" )
print "fc", xpath2.selectSingleNode( rqdoc ).getClass().getName()
quantity = int( xpath2.selectSingleNode( rqdoc ).getAttribute("quantity") )
location = int( xpath2.selectSingleNode( rqdoc ).getAttribute("location") )
print product_number, quantity, location
xpath3 = DOMXPath( "//Product" )
xpath3.selectSingleNode( respdoc ).setAttribute( "number", str(product_number))
xpath4 = DOMXPath( '//part[@location=' + str( location ) + ']' )
xpath4.selectSingleNode( respdoc ).setAttribute( "quantity", str( quantity ))
print "done"
}}}