linhpham / xml_split

Split XML files on an element, yielding (streaming, so constant memory usage) each node in turn. Uses sgrep2 internally; future versions should use a pure-Ruby SAX parser.

XmlSplit

Split XML files on an element, yielding (streaming, so constant memory usage) each node in turn.

Uses sgrep internally.

As seen on "Split XML files with sgrep, a classic UNIX utility from 1995"

Similar, but not identical, to XML-Twig's xml_split.

Dependencies

Currently requires that you have sgrep or sgrep2 in your path.

Usage

>> require 'xml_split'
=> true
>> x = XmlSplit.new('15MinLP_15Days.xml', 'IntervalReading')
=> #<XmlSplit:0x0000010395ce60 @nodes=[], @cache_full=false, @path="/tmp/scratch/15MinLP_15Days.xml", @element="IntervalReading", @caching=false>
>> x.each { |node| puts node }
<IntervalReading>
    <cost>907</cost>
    <timePeriod>
        <duration>900</duration>
        <start>1330578000</start>
         <!-- 3/1/2012 5:00:00 AM  -->
    </timePeriod>
    <value>302</value>
</IntervalReading>
[...]

Command-line

gem install xml_split

This will give you a binary called xml_split. You can use it to split XML files into many smaller files:

$ xml_split ~/samples/CLF8762E_20120709.xml MyElement CLF8762E/20120709
[...]
$ ls CLF8762E
20120709_0000000000
20120709_0000000001
20120709_0000000002
20120709_0000000003
20120709_0000000004
20120709_0000000005
20120709_0000000006
20120709_0000000007
20120709_0000000008
[...]

Copyright

Copyright 2012 Brighter Planet, Inc.