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API for zip-filter - clojure-contrib v1.1 (stable)

by Chris Houser
Full namespace name: clojure.contrib.zip-filter

Overview

System for filtering trees and nodes generated by zip.clj in
general, and xml trees in particular.

Public Variables and Functions


ancestors

function
Usage: (ancestors loc)

Returns a lazy sequence of all ancestors of location loc, starting
with loc and proceeding to loc's parent node and on through to the
root of the tree.
Source

children

function
Usage: (children loc)

Returns a lazy sequence of all immediate children of location loc,
left-to-right.
Source

children-auto

function
Usage: (children-auto loc)

Returns a lazy sequence of all immediate children of location loc,
left-to-right, marked so that a following tag= predicate will auto-descend.
Source

descendants

function
Usage: (descendants loc)

Returns a lazy sequence of all descendants of location loc, in
depth-first order, left-to-right, starting with loc.
Source

left-locs

function
Usage: (left-locs loc)

Returns a lazy sequence of locations to the left of loc, starting with loc.
Source

leftmost?

function
Usage: (leftmost? loc)

Returns true if there are no more nodes to the left of location loc.
Source

right-locs

function
Usage: (right-locs loc)

Returns a lazy sequence of locations to the right of loc, starting with loc.
Source

rightmost?

function
Usage: (rightmost? loc)

Returns true if there are no more nodes to the right of location loc.
Source

zip-filter.xml








  

  
attr

  function

  
Usage: (attr attrname)
       (attr loc attrname)


  
Returns the xml attribute named attrname, of the xml node at location loc.

  
  
  Source


  

  
attr=

  function

  
Usage: (attr= attrname attrval)


  
Returns a query predicate that matches a node when it has an
attribute named attrname whose value is attrval.

  
  
  Source


  

  
seq-test

  function

  
Usage: (seq-test preds)


  
Returns a query predicate that matches a node when its xml content
matches the query expresions given.

  
  
  Source


  

  
tag=

  function

  
Usage: (tag= tagname)


  
Returns a query predicate that matches a node when its is a tag
named tagname.

  
  
  Source


  

  
text

  function

  
Usage: (text loc)


  
Returns the textual contents of the given location, similar to
xpaths's value-of

  
  
  Source


  

  
text=

  function

  
Usage: (text= s)


  
Returns a query predicate that matches a node when its textual
content equals s.

  
  
  Source


  

  
xml->

  function

  
Usage: (xml-> loc & preds)


  
The loc is passed to the first predicate.  If the predicate returns
a collection, each value of the collection is passed to the next
predicate.  If it returns a location, the location is passed to the
next predicate.  If it returns true, the input location is passed to
the next predicate.  If it returns false or nil, the next predicate
is not called.

This process is repeated, passing the processed results of each
predicate to the next predicate.  xml-> returns the final sequence.
The entire chain is evaluated lazily.

There are also special predicates: keywords are converted to tag=,
strings to text=, and vectors to sub-queries that return true if
they match.

See the footer of zip-query.clj for examples.

  
  
  Source


  

  
xml1->

  function

  
Usage: (xml1-> loc & preds)


  
Returns the first item from loc based on the query predicates
given.  See xml->

  
  
  Source






              

            

          

	

	
      

      
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