HrrRbRelaxedXML

hrr_rb_relaxed_xml is an REXML-based XML toolkit that can have multiple root elements.

Table of Contents

• Installation
• Usage
• Contributing
• License
• Code of Conduct

Installation

Add this line to your application's Gemfile:

gem 'hrr_rb_relaxed_xml'

And then execute:

$ bundle

Or install it yourself as:

$ gem install hrr_rb_relaxed_xml

Usage

First of all, hrr_rb_relaxed_xml library needs to be loaded.

require 'hrr_rb_relaxed_xml'

hrr_rb_relaxed_xml supports tree parsing of an XML document that has multiple root elements.

xml_doc = HrrRbRelaxedXML::Document.new <<-EOB
<root1>
  <child11 />
  <child12 />
  <child13 />
</root1>
<root2>
  <child21 />
  <child22 />
  <child23 />
</root2>
EOB

Then, any methods that are supported by REXML can be performed.

#write method outputs an XML that contains all root elements.

xml_doc.write(STDOUT, 2)

The output of the #write method is the below.

<root1>
  <child11 />
  <child12 />
  <child13 />
</root1>
<root2>
  <child21 />
  <child22 />
  <child23 />
</root2>

With using #elements, #root, #add_element, or #add methods, the XML document can be manipulated.

xml_doc.elements.to_a # => [<root1> ... </>, <root2> ... </>]

xml_doc.elements[1] # => <root1> ... </>
xml_doc.elements['root1'].elements['child1'] # => <child1> ... </>
xml_doc.elements['root1'].elements['child1'].root # => <root1> ... </>

xml_doc.elements[2] # => <root2> ... </>
xml_doc.elements['root2'].elements['child2'] # => <child2> ... </>
xml_doc.elements['root2'].elements['child2'].root # => <root2> ... </>

xml_doc.add_element 'root3'
xml_doc.elements[3] # => <root3> ... </>

xml_doc.add REXML::Element.new('root4')
xml_doc.elements[4] # => <root4> ... </>

hrr_rb_relaxed_xml also supports XPath.

xml_doc.elements['root1'].elements['child1'].xpath # => "/root1/child1"
xml_doc.elements['root2'].elements['child2'].xpath # => "/root2/child2"

HrrRbRelaxedXML::XPath.match(xml_doc, "/*") # => [<root1> ... </>, <root2> ... </>]
HrrRbRelaxedXML::XPath.match(xml_doc, "/root1/../root2") # => [<root2> ... </>]

HrrRbRelaxedXML::XPath.match(xml_doc, "/root1/child12/following::*") # => [<child13/>, <root2> ... </>, <child21/>, <child22/>, <child23/>]
HrrRbRelaxedXML::XPath.match(xml_doc, "/root1/child12/following-sibling::*") # => [<child13/>]

HrrRbRelaxedXML::XPath.match(xml_doc, "/root2/child22/preceding::*") # => [<child21/>, <child13/>, <child12/>, <child11/>, <root1> ... </>]
HrrRbRelaxedXML::XPath.match(xml_doc, "/root2/child22/preceding-sibling::*") # => [<child21/>]

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/hirura/hrr_rb_relaxed_xml. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the hrr_rb_relaxed_xml project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.