hubaddr - Data addresses
use Hub;
tie my %data, Hub::knot('Nest');
$data{'/root'} = {
list => [qw(A B C)],
};
# Add a value to the array
$$data{'/root/list/3'} = 'D';
# Get a value from the array
print "First element is: $$data{'/root/list/0'}\n";
Addresses are the syntax used to reference nested data. Addresses are delimited by the solidus (/) character. Where an element of a nested perl data structure may be referred to as:
$hash->{'h1'}->{'h2'}->{'name'}
The same value would be addressed as:
/h1/h2/name
Array elements are accessed by thier index:
$data{'/array'} = ['zero', 'one', 'two'];
die unless 'one' eq $data{'/array/1'};
The Hub library exports the variable $Hub by default. It is an extension of the nested data type which transcends the filesystem. Meaning that you may access files beneath your current working directory in this same manner:
$$Hub{'/conf/somefile.conf'}
Would return the File object for the file ./conf/somefile.conf. When using
selectors, one may iterate over an array of files by specifying
$$Hub{'/conf/{.conf$}'}
Selectors are used to match keys in the address. A selector takes the forms:
{keyname comparator value}
{regex}
Where:
keyname Name of the element to compare comparator Comparison operator* value Comparison value regex A regular expression
*See Hub::compare
Given:
Ryan Gies (ryangies@livesite.net)
Copyright (C) 2006-2007 by Livesite Networks, LLC. All rights reserved.
Copyright (C) 2000-2005 by Ryan Gies. All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
* Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
* The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
To the best of our knowledge, no patented algorithms have been used. However, we do not have the resources to carry out a patent search, and therefore cannot give any guarantee of the above statement.
08/02/2007