vtd-xml
Parse large amounts of XML quickly and easily.
This library currently only works with JRuby.
Installation
Add this line to your application's Gemfile:
gem 'vtd-xml', '~> 0.0.1'
And then execute:
bundle
Or install it yourself as:
gem install vtd-xml
Usage
With the following example XML:
<?xml version="1.0" encoding="utf-8"?>
<books>
<book title="A Tale of Two Cities" sold="200000000" firstPublished="1859">
<author name="Charles Dickens" />
<language>English</language>
<publisher>Chapman & Hall</publisher>
<ratings>
<rating userID="1">5</rating>
<rating userID="4">2</rating>
<rating userID="2">3</rating>
</ratings>
</book>
<book title="The Lord of the Rings" sold="150000000" firstPublished="1954">
<author name="J. R. R. Tolkien" />
<language>English</language>
<publisher>George Allen & Unwin</publisher>
<ratings>
<rating userID="1">5</rating>
<rating userID="4">4</rating>
<rating userID="2">5</rating>
</ratings>
</book>
<book title="The Little Prince" sold="140000000" firstPublished="1943">
<author name="Antoine de Saint-Exupéry" />
<language>French</language>
<publisher>Gallimard</publisher>
<ratings>
<rating userID="4">4</rating>
<rating userID="2">2</rating>
<rating userID="1">3</rating>
</ratings>
</book>
</books>Parsing a file
require 'vtd-xml'
# Create a parser
parser = VTD::Xml::Parser.new 'path/to.xml'
# This shortcut does the same
parser = VTD::Xml.open 'path/to.xml'
parser.find('//book/author').each do |node|
# Iterates through each node
end
parser.find('//book/author').max_by { |node| node['sold'] }Finding a node
node = parser.find('//book/author[1]').firstWorking with attributes
# Accessing attributes
node['name']
node.fetch('missing', 'so use this default')
node.fetch('another-missing') { 'so call this block and use it' }
node.slice('title', 'missing')
# => {'title' => 'A Tale of Two Cities', 'missing' => nil}
node.attributes # => returns every attributeNode traversal
child = node.children('language').first
child.text # => "English"
node.children('rating').map do |child|
child.text.to_i
end
# => [5,2,3]See the examples directory for more.
Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request