NAME

       XML::Compile::Iterator - reduce view on a node tree

SYNOPSIS

DESCRIPTION

       It would have been nice to be able to use XML::LibXML::Iterator, but on the moment of this
       writing, that module is not maintained.  Besides, this implementation of the iterator is
       more specific for our purpose.  The main user for this object currently is
       XML::Compile::Translate.

METHODS

   Constructors
       $obj->descend( [$node, [$path, [$filter]]] )
           The $node is a child of the node handled by the iterator where this method is called
           upon.  Without explicit $node, the current node is used.  Returned is a new
           XML::Compile::Iterator object.  The new iterator will use the same $filter as the
           parent iterator by default.  The internal administered path with be extended with the
           $path.

       XML::Compile::Iterator->new($node, $path, $filter,)
           The $node is a XML::LibXML::Node object, of which the direct children are inspected.

           The $filter a CODE reference which is called for each child node.  The only parameter
           is the parent $node, and then it must return either true or false.  In case of true,
           the node is selected.  The FILTERS is applied to all children of the $node once, when
           the first child is requested by the program.

   Attributes
       $obj->filter()
           Returns the CODE reference which is used to select the nodes.

       $obj->node()
           Returns the XML::LibXML::Node node of which the children are walked through.

       $obj->path()
           The path represents the location where the node is, like a symbolic link, how you got
           there.

   Scanning
       $obj->childs()
           Returns the child nodes which fulfil the filter requirements.  In LIST context as
           list, in SCALAR context as reference to an ARRAY.

       $obj->currentChild()
           Returns the current child node.

       $obj->firstChild()
           Returns the first child node.  Does not change the current position.

       $obj->lastChild()
           Returns the last child node which fulfills the requirements.  Does not change the
           current position.

       $obj->nextChild()
           Returns the next child when available, otherwise "undef".

       $obj->nrChildren()
           Returns the number of childnodes which fulfill the restriction.

       $obj->previousChild()
           Returns the previous child when available, otherwise "undef".

   simplify XML node access
       $obj->currentContent()
           Returns the textContent of the currentChild() node, or undef.

       $obj->currentLocal()
           Returns the local name of the currentChild(), or the empty string.

       $obj->currentType()
           Returns the type of the currentChild(), or the empty string.

       $obj->nodeLocal()
           Returns the local name of the node(), or the empty string.

       $obj->nodeNil()
           Returns true if the current node has "xsi:type="true"".

       $obj->nodeType()
           Returns the type of the node(), or the empty string.

       $obj->textContent()
           Returns the textContent of the node(), or undef.

SEE ALSO

       This module is part of XML-Compile distribution version 1.58, built on June 27, 2017.
       Website: http://perl.overmeer.net/xml-compile/

       Please post questions or ideas to the mailinglist at
       http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/xml-compile .  For live contact with
       other developers, visit the "#xml-compile" channel on "irc.perl.org".

LICENSE

       Copyrights 2006-2017 by [Mark Overmeer]. For other contributors see ChangeLog.

       This program is free software; you can redistribute it and/or modify it under the Artistic
       license.  See http://dev.perl.org/licenses/artistic.html