Difference between revisions of "API:EPrints/XML"

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<!-- Pod2Wiki=_preamble_  
 
<!-- Pod2Wiki=_preamble_  
 
This page has been automatically generated from the EPrints 3.2 source. Any wiki changes made between the 'Pod2Wiki=*' and 'Edit below this comment' comments will be lost.
 
This page has been automatically generated from the EPrints 3.2 source. Any wiki changes made between the 'Pod2Wiki=*' and 'Edit below this comment' comments will be lost.
  -->{{API}}{{Pod2Wiki}}{{API:Source|file=EPrints/XML.pm|package_name=EPrints::XML}}[[Category:API|XML]]<div><!-- Edit below this comment -->
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  -->{{API}}{{Pod2Wiki}}{{API:Source|file=perl_lib/EPrints/XML.pm|package_name=EPrints::XML}}[[Category:API|XML]][[Category:API:EPrints/XML|XML]]<div><!-- Edit below this comment -->
  
  
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'''EPrints::XML''' - XML Abstraction Module
 
'''EPrints::XML''' - XML Abstraction Module
  
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<!-- Edit below this comment -->
 
<!-- Edit below this comment -->
  
 +
For preference, use the methods in [[API:EPrints/Handle/XML|EPrints::Handle::XML]]
 +
<!-- Pod2Wiki= -->
 +
<!-- Pod2Wiki=head_synopsis -->
 +
==SYNOPSIS==
 +
<source lang="perl">my $xml = $repository->xml;
 +
 +
$doc = $xml->parse_string( $string );
 +
$doc = $xml->parse_file( $filename );
 +
$doc = $xml->parse_url( $url );
 +
 +
$utf8_string = $xml->to_string( $dom_node, %opts );
  
For preference, use the methods in [[API:EPrints/Handle/XML|EPrints::Handle::XML]]
+
$dom_node = $xml->clone( $dom_node ); # deep
 +
$dom_node = $xml->clone_node( $dom_node ); # shallow
 +
 
 +
# clone and return child nodes
 +
$dom_node = $xml->contents_of( $dom_node );
 +
# Return text child nodes as a string
 +
$utf8_string = $xml->text_contents_of( $dom_node );
 +
 
 +
$dom_node = $xml->create_element( $name, %attr );
 +
$dom_node = $xml->create_text_node( $value );
 +
$dom_node = $xml->create_comment( $value );
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$dom_node = $xml->create_document_fragment;
 +
 
 +
$xml->dispose( $dom_node );</source>
  
 +
<!-- Edit below this comment -->
  
  
 
<!-- Pod2Wiki= -->
 
<!-- Pod2Wiki= -->
</div>
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<!-- Pod2Wiki=head_description -->
<!-- Pod2Wiki=head_synopsis -->
+
==DESCRIPTION==
==SYNOPSIS==
 
  my $xml = $repository-&gt;xml;
 
 
 
  $doc = $xml-&gt;parse_string( $string );
 
  $doc = $xml-&gt;parse_file( $filename );
 
  $doc = $xml-&gt;parse_url( $url );
 
 
 
  $utf8_string = $xml-&gt;to_string( $dom_node, %opts );
 
 
 
  $dom_node = $xml-&gt;clone( $dom_node ); # deep
 
  $dom_node = $xml-&gt;clone_node( $dom_node ); # shallow
 
 
 
  # clone and return child nodes
 
  $dom_node = $xml-&gt;contents_of( $dom_node );
 
  # Return text child nodes as a string
 
  $utf8_string = $xml-&gt;text_contents_of( $dom_node );
 
 
 
  $dom_node = $xml-&gt;create_element( $name, %attr );
 
  $dom_node = $xml-&gt;create_text_node( $value );
 
  $dom_node = $xml-&gt;create_comment( $value );
 
  $dom_node = $xml-&gt;create_document_fragment;
 
 
 
  $xml-&gt;dispose( $dom_node );
 
 
 
head1 DESCRIPTION
 
 
 
 
EPrints can use either XML::DOM, XML::LibXML or XML::GDOME modules to generate and process XML. Some of the functionality of these modules differs so this module abstracts such functionality so that all the module specific code is in one place.  
 
EPrints can use either XML::DOM, XML::LibXML or XML::GDOME modules to generate and process XML. Some of the functionality of these modules differs so this module abstracts such functionality so that all the module specific code is in one place.  
  
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<!-- Pod2Wiki= -->
 
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<!-- Pod2Wiki=head_methods -->
 
<!-- Pod2Wiki=head_methods -->
 
==METHODS==
 
==METHODS==
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<!-- Pod2Wiki=head_parsing -->
 
<!-- Pod2Wiki=head_parsing -->
 
===Parsing===
 
===Parsing===
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</div>
 
<!-- Pod2Wiki=item_parse_string -->
 
====parse_string====
 
 
 
  $doc = $xml-&gt;parse_string( $string, %opts )
 
  $doc = $xml-&gt;parse_string( $string, %opts )
 
Returns an XML document parsed from $string.
 
Returns an XML document parsed from $string.
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
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<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_parse_file -->
 
====parse_file====
 
  
 
  $doc = $xml-&gt;parse_file( $filename, %opts )
 
  $doc = $xml-&gt;parse_file( $filename, %opts )
 
Returns an XML document parsed from the file called $filename.
 
Returns an XML document parsed from the file called $filename.
  
  base_path - base path to load DTD files from
+
<pre>  base_path - base path to load DTD files from
   no_expand - don't expand entities
+
   no_expand - don't expand entities</pre>
 
 
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<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_parse_url -->
 
====parse_url====
 
  
 
  $doc = $xml-&gt;parse_url( $url, %opts )
 
  $doc = $xml-&gt;parse_url( $url, %opts )
 
Returns an XML document parsed from the content located at $url.
 
Returns an XML document parsed from the content located at $url.
  
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
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<!-- Edit below this comment -->
 
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<!-- Pod2Wiki= -->
 
<!-- Pod2Wiki= -->
</div>
 
 
<!-- Pod2Wiki=head_node_creation -->
 
<!-- Pod2Wiki=head_node_creation -->
 
===Node Creation===
 
===Node Creation===
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<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_create_element -->
 
====create_element====
 
 
 
  $node = $xml-&gt;create_element( $name [, @attrs ] )
 
  $node = $xml-&gt;create_element( $name [, @attrs ] )
 
Returns a new XML element named $name with optional attribute pairs @attrs.
 
Returns a new XML element named $name with optional attribute pairs @attrs.
  
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+
$node = $xml-&gt;create_data_element( $name, $value [, @attrs ] )
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Returns a new XML element named $name with $value for contents and optional attribute pairs @attrs.
<!-- Edit below this comment -->
 
  
 +
$value may be undef, an XML tree or an array ref of children, otherwise it is stringified and appended as a text node. Child entries are passed de-referenced to [[API:EPrints/XML#create_data_element|create_data_element]].
  
<!-- Pod2Wiki= -->
+
<pre>  $xml-&gt;create_data_element(
</div>
+
    "html",
<!-- Pod2Wiki=item_create_cdata_section -->
+
    [
====create_cdata_section====
+
      [ "head" ],
 +
      [ "body",
 +
        [ [ "div", undef, id =&gt; "contents" ] ]
 +
      ],
 +
    ],
 +
    xmlns =&gt; "http://www.w3.org/1999/xhtml"
 +
  );</pre>
  
 
  $node = $xml-&gt;create_cdata_section( $value )
 
  $node = $xml-&gt;create_cdata_section( $value )
 
Returns a CDATA section containing $value.
 
Returns a CDATA section containing $value.
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
<span style='display:none'>User Comments</span>
 
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<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_create_text_node -->
 
====create_text_node====
 
  
 
  $node = $xml-&gt;create_text_node( $value )
 
  $node = $xml-&gt;create_text_node( $value )
 
Returns a new XML text node containing $value.
 
Returns a new XML text node containing $value.
 
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</div>
 
<!-- Pod2Wiki=item_create_comment -->
 
====create_comment====
 
  
 
  $node = $xml-&gt;create_comment( $value )
 
  $node = $xml-&gt;create_comment( $value )
 
Returns a new XML comment containing $value.
 
Returns a new XML comment containing $value.
 
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</div>
 
<!-- Pod2Wiki=item_create_document_fragment -->
 
====create_document_fragment====
 
  
 
  $node = $xml-&gt;create_document_fragment
 
  $node = $xml-&gt;create_document_fragment
 
Returns a new XML document fragment.
 
Returns a new XML document fragment.
  
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</div>
 
 
<!-- Pod2Wiki=head_other -->
 
<!-- Pod2Wiki=head_other -->
 
===Other===
 
===Other===
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<!-- Pod2Wiki=item_is -->
 
====is====
 
 
 
  $bool = $xml-&gt;is( $node, $type [, $type ... ] )
 
  $bool = $xml-&gt;is( $node, $type [, $type ... ] )
 
Returns true if $node is one of the given node types: Document, DocumentFragment, Element, Comment, Text.
 
Returns true if $node is one of the given node types: Document, DocumentFragment, Element, Comment, Text.
 
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</div>
 
<!-- Pod2Wiki=item_clone -->
 
====clone====
 
  
 
  $node = $xml-&gt;clone( $node )
 
  $node = $xml-&gt;clone( $node )
 
Returns a deep clone of $node. The new node(s) will be owned by this object.
 
Returns a deep clone of $node. The new node(s) will be owned by this object.
 
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</div>
 
<!-- Pod2Wiki=item_clone_node -->
 
====clone_node====
 
  
 
  $node = $xml-&gt;clone_node( $node )
 
  $node = $xml-&gt;clone_node( $node )
 
Returns a clone of $node only (no children). The new node will be owned by this object.
 
Returns a clone of $node only (no children). The new node will be owned by this object.
 
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<span style='display:none'>User Comments</span>
 
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<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_clone_node -->
 
====clone_node====
 
 
$node = EPrints::XML::clone_node( $node [, $deep ] )
 
DEPRECATED.
 
 
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<span style='display:none'>User Comments</span>
 
<!-- Edit below this comment -->
 
 
 
<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_contents_of -->
 
====contents_of====
 
  
 
  $node = $xml-&gt;contents_of( $node )
 
  $node = $xml-&gt;contents_of( $node )
 
Returns a document fragment containing a copy of all the children of $node.
 
Returns a document fragment containing a copy of all the children of $node.
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
<span style='display:none'>User Comments</span>
 
<!-- Edit below this comment -->
 
 
 
<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_text_contents_of -->
 
====text_contents_of====
 
  
 
  $string = $xml-&gt;text_contents_of( $node )
 
  $string = $xml-&gt;text_contents_of( $node )
 
Returns the concantenated value of all text nodes in $node (or the value of $node if $node is a text node).
 
Returns the concantenated value of all text nodes in $node (or the value of $node if $node is a text node).
 
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</div>
 
<!-- Pod2Wiki=item_to_string -->
 
====to_string====
 
  
 
  $utf8_string = $xml-&gt;to_string( $node, %opts )
 
  $utf8_string = $xml-&gt;to_string( $node, %opts )
Line 286: Line 134:
 
Options:
 
Options:
 
indent - if true will indent the XML tree
 
indent - if true will indent the XML tree
 
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<!-- Pod2Wiki=item_to_string -->
 
====to_string====
 
 
$string = EPrints::XML::to_string( $node, [$enc], [$noxmlns] )
 
Return the given node (and its children) as a UTF8 encoded string.
 
 
$enc is only used when $node is a document.
 
 
If $stripxmlns is true then all xmlns attributes and namespace prefixes are removed. Handy for making legal XHTML.
 
 
Papers over some cracks, specifically that XML::GDOME does not  support toString on a DocumentFragment, and that XML::GDOME does not insert a space before the / in tags with no children, which confuses some browsers. Eg. &lt;br/&gt; vs &lt;br /&gt;
 
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
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<!-- Pod2Wiki=item_dispose -->
 
====dispose====
 
  
 
  $xml-&gt;dispose( $node )
 
  $xml-&gt;dispose( $node )
 
Dispose and free the memory used by $node.
 
Dispose and free the memory used by $node.
  
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+
<!-- Pod2Wiki=head_copyright -->
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+
==COPYRIGHT==
<!-- Edit below this comment -->
+
: Copyright 2000-2011 University of Southampton.
 
 
 
 
<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_parse_xml -->
 
====parse_xml====
 
 
 
$doc = EPrints::XML::parse_xml( $file, $basepath, $no_expand )
 
Return a DOM document describing the XML file specified by $file. With the optional root path for looking for the DTD of $basepath. If $noexpand is true then entities will not be expanded.
 
 
 
If we are using GDOME then it will create an XML::GDOME document instead.
 
 
 
In the event of an error in the XML file, report to STDERR and return undef.
 
 
 
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</div>
 
<!-- Pod2Wiki=item_event_parse -->
 
====event_parse====
 
 
 
event_parse( $fh, $handler )
 
Parses the XML from filehandle $fh, calling the appropriate events in the handler where necessary.
 
 
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
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<!-- Edit below this comment -->
 
 
 
 
 
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</div>
 
<!-- Pod2Wiki=item_is_dom -->
 
====is_dom====
 
 
 
$boolean = is_dom( $node, @nodestrings )
 
return true if node is an object of type XML::DOM/GDOME::$nodestring
 
where $nodestring is any value in @nodestrings.
 
 
 
if $nodestring is not defined then return true if $node is any
 
XML::DOM/GDOME object.
 
 
 
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</div>
 
<!-- Pod2Wiki=item_clone_and_own -->
 
====clone_and_own====
 
 
 
$newnode = EPrints::XML::clone_and_own( $doc, $node, $deep )
 
This function abstracts the different ways that XML::DOM and  XML::GDOME allow objects to be moved between documents.
 
 
 
It returns a clone of $node but belonging to the document $doc no matter what document $node belongs to.
 
 
 
If $deep is true then the clone will also clone all nodes belonging to $node, recursively.
 
 
 
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</div>
 
<!-- Pod2Wiki=item_make_document -->
 
====make_document====
 
 
 
$document = EPrints::XML::make_document()
 
Create and return an empty document.
 
 
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
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<!-- Edit below this comment -->
 
 
 
 
 
<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_write_xml_file -->
 
====write_xml_file====
 
 
 
EPrints::XML::write_xml_file( $node, $filename )
 
Write the given XML node $node to file $filename.
 
 
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
<span style='display:none'>User Comments</span>
 
<!-- Edit below this comment -->
 
 
 
 
 
<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_write_xhtml_file -->
 
====write_xhtml_file====
 
 
 
EPrints::XML::write_xhtml_file( $node, $filename )
 
Write the given XML node $node to file $filename with an XHTML doctype.
 
 
 
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
 
<span style='display:none'>User Comments</span>
 
<!-- Edit below this comment -->
 
 
 
 
 
<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_tidy -->
 
====tidy====
 
 
 
EPrints::XML::tidy( $domtree, { collapse=&gt;['element','element'...] }, [$indent] )
 
Neatly indent the DOM tree.
 
 
 
Note that this should not be done to XHTML as the differenct between white space and no white space does matter sometimes.
 
  
This method modifies the tree it is given. Possibly there should be a version which returns a new version without modifying the tree.
+
: This file is part of EPrints http://www.eprints.org/.
  
Indent is the number of levels to ident by.
+
: EPrints is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
  
<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce; padding: 0em 1em 0em 1em; font-size: 80%; '>
+
: EPrints is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSESee the GNU Lesser General Public License for more details.
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<!-- Pod2Wiki= -->
 
</div>
 
<!-- Pod2Wiki=item_namespace -->
 
====namespace====
 
  
$namespace = EPrints::XML::namespace( $thing, $version )
+
: You should have received a copy of the GNU Lesser General Public License along with EPrints.  If not, see http://www.gnu.org/licenses/.
Return the namespace for the given version of the eprints xml.
 
  
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====version====
 
 
 
$v = EPrints::XML::version()
 
Returns a string description of the current XML library and version.
 
 
 
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Latest revision as of 09:56, 22 January 2013

EPrints 3 Reference: Directory Structure - Metadata Fields - Repository Configuration - XML Config Files - XML Export Format - EPrints data structure - Core API - Data Objects


API: Core API

Latest Source Code (3.3, 3.2) | Revision Log | Before editing this page please read Pod2Wiki


NAME

EPrints::XML - XML Abstraction Module


For preference, use the methods in EPrints::Handle::XML

SYNOPSIS

my $xml = $repository->xml;

$doc = $xml->parse_string( $string );
$doc = $xml->parse_file( $filename );
$doc = $xml->parse_url( $url );

$utf8_string = $xml->to_string( $dom_node, %opts );

$dom_node = $xml->clone( $dom_node ); # deep
$dom_node = $xml->clone_node( $dom_node ); # shallow

# clone and return child nodes
$dom_node = $xml->contents_of( $dom_node );
# Return text child nodes as a string
$utf8_string = $xml->text_contents_of( $dom_node );

$dom_node = $xml->create_element( $name, %attr );
$dom_node = $xml->create_text_node( $value );
$dom_node = $xml->create_comment( $value );
$dom_node = $xml->create_document_fragment;

$xml->dispose( $dom_node );


DESCRIPTION

EPrints can use either XML::DOM, XML::LibXML or XML::GDOME modules to generate and process XML. Some of the functionality of these modules differs so this module abstracts such functionality so that all the module specific code is in one place.


METHODS

Parsing

$doc = $xml->parse_string( $string, %opts )

Returns an XML document parsed from $string.

$doc = $xml->parse_file( $filename, %opts )

Returns an XML document parsed from the file called $filename.

  base_path - base path to load DTD files from
  no_expand - don't expand entities
$doc = $xml->parse_url( $url, %opts )

Returns an XML document parsed from the content located at $url.


Node Creation

$node = $xml->create_element( $name [, @attrs ] )

Returns a new XML element named $name with optional attribute pairs @attrs.

$node = $xml->create_data_element( $name, $value [, @attrs ] )

Returns a new XML element named $name with $value for contents and optional attribute pairs @attrs.

$value may be undef, an XML tree or an array ref of children, otherwise it is stringified and appended as a text node. Child entries are passed de-referenced to create_data_element.

  $xml->create_data_element(
    "html",
    [
      [ "head" ],
      [ "body",
        [ [ "div", undef, id => "contents" ] ]
      ],
    ],
    xmlns => "http://www.w3.org/1999/xhtml"
  );
$node = $xml->create_cdata_section( $value )

Returns a CDATA section containing $value.

$node = $xml->create_text_node( $value )

Returns a new XML text node containing $value.

$node = $xml->create_comment( $value )

Returns a new XML comment containing $value.

$node = $xml->create_document_fragment

Returns a new XML document fragment.


Other

$bool = $xml->is( $node, $type [, $type ... ] )

Returns true if $node is one of the given node types: Document, DocumentFragment, Element, Comment, Text.

$node = $xml->clone( $node )

Returns a deep clone of $node. The new node(s) will be owned by this object.

$node = $xml->clone_node( $node )

Returns a clone of $node only (no children). The new node will be owned by this object.

$node = $xml->contents_of( $node )

Returns a document fragment containing a copy of all the children of $node.

$string = $xml->text_contents_of( $node )

Returns the concantenated value of all text nodes in $node (or the value of $node if $node is a text node).

$utf8_string = $xml->to_string( $node, %opts )

Serialises and returns the $node as a UTF-8 string.

To generate an XHTML string see EPrints::XHTML.

Options: indent - if true will indent the XML tree

$xml->dispose( $node )

Dispose and free the memory used by $node.

COPYRIGHT

Copyright 2000-2011 University of Southampton.
This file is part of EPrints http://www.eprints.org/.
EPrints is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
EPrints is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with EPrints. If not, see http://www.gnu.org/licenses/.