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SPOPS::Iterator 0.87

  Date Added: April 07, 2010  |  Visits: 618

SPOPS::Iterator

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SPOPS::Iterator is a class to cycle through results and return SPOPS objects. SYNOPSIS my $iter = $spops_class->fetch_iterator({ where => last_name like ?, value => [ smi% ] }); while ( $iter->has_next ) { my $object = $iter->get_next; print "Object ID: ", $object->id, " at position: ", $iter->position, "n"; } One of the problems with current SPOPS implementations is that retrieving groups of objects is an all-or-nothing affair -- you get a list with all instantiated objects or you do not retrive them in the first place. This can be quite memory intensive, particularly when a user executes a query that can return thousands of objects back at one time. This class -- or, more specifically, implementations of the interface in this class -- aims to change that. Instead of returning a list of objects from a group retrieval, you get back an SPOPS::Iterator object. This object has a simple interface to cycle forward through objects and let you deal with them one at a time. It does not keep track of these for you -- once you request the SPOPS object through the get_next() call, the iterator loses track of it. The iterator does keep track of the current count (on a 1-based scheme) and whether you are currently on the first or last element. It is important to state that this works within the realm of other SPOPS capabilities -- just like the fetch_group() method, all objects returned will get checked for security, and if a user cannot see a certain object it does not get returned and the iterator moves onto the next object. As a result, users will never create an SPOPS::Iterator object themselves. Instead, the object is returned from a method in a SPOPS implementation class, such as SPOPS::DBI. The initial module documentation is for the interface; there is also a section of creating a subclass of this module for SPOPS authors..

Requirements: No special requirements
Platforms: Linux
Keyword: Class Cycle Iterator Libraries Object Objects Programming Return Spops Spopsiterator
Users rating: 0/10

License: Freeware Size: 286.72 KB
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