<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Redland RDF Application Framework - Ruby RDoc - Class: Redland::Query</title>
<link rel="stylesheet" href="../.././rdoc-style.css" type="text/css" media="screen" />
<script type="text/javascript">
// <![CDATA[
function popupCode( url ) {
window.open(url, "Code", "resizable=yes,scrollbars=yes,toolbar=no,status=no,height=150,width=400")
}
function toggleCode( id ) {
if ( document.getElementById )
elem = document.getElementById( id );
else if ( document.all )
elem = eval( "document.all." + id );
else
return false;
elemStyle = elem.style;
if ( elemStyle.display != "block" ) {
elemStyle.display = "block"
} else {
elemStyle.display = "none"
}
return true;
}
// Make codeblocks hidden by default
document.writeln( "<style type=\"text/css\">div.method-source-code { display: none }<\/style>" )
// ]]>
</script>
</head>
<body>
<div class="outerBlock">
<div class="outerHeader">
Go to <a href="/" target="_parent">Redland Home</a> -
<a href="/bindings/" target="_parent">Language Bindings Home</a> -
<a href="/docs/ruby.html" target="_parent">Ruby API Home</a>
</div>
<div id="classHeader">
<table class="header-table">
<tr class="top-aligned-row">
<td><strong>Class</strong></td>
<td class="class-name-in-header">Redland::Query</td>
</tr>
<tr class="top-aligned-row">
<td><strong>In:</strong></td>
<td><a href="../../files/rdf/redland/query_rb.html">rdf/redland/query.rb</a><br /></td>
</tr>
<tr class="top-aligned-row">
<td><strong>Parent:</strong></td>
<td>Object</td>
</tr>
</table>
</div>
<!-- banner header -->
<div id="bodyContent">
<div id="contextContent">
<div id="description">
<p>This class provides query language support for RDF models either via an adaptor class or direct by persistant storage.</p>
</div>
</div>
<div id="method-list">
<h3 class="section-bar">Methods</h3>
<div class="name-list"><a href="#M000035">create_finalizer</a> <a href="#M000034">execute</a> <a href="#M000033">new</a> </div>
</div>
</div>
<!-- if includes -->
<div id="section">
<div id="attribute-list">
<h3 class="section-bar">Attributes</h3>
<div class="name-list">
<table>
<tr class="top-aligned-row context-row">
<td class="context-item-name">query</td>
<td class="context-item-value"> [R] </td>
<td class="context-item-desc"></td>
</tr>
</table>
</div>
</div>
<!-- if method_list -->
<div id="methods">
<h3 class="section-bar">Public Class methods</h3>
<div id="method-M000035" class="method-detail"><a name="M000035" id="M000035"></a>
<div class="method-heading"><a href="#M000035" class="method-signature"><span class="method-name">create_finalizer</span><span class="method-args">(query)</span></a></div>
<div class="method-description">
<p>You shouldn‘t use this. Used internally for cleanup.</p>
<p><a class="source-toggle" href="#" onclick="toggleCode('M000035-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000035-source">
<pre>
<span class="ruby-comment cmt"># File rdf/redland/query.rb, line 36</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-constant">Query</span>.<span class="ruby-identifier">create_finalizer</span>(<span class="ruby-identifier">query</span>)
<span class="ruby-identifier">proc</span>{<span class="ruby-operator">|</span><span class="ruby-identifier">id</span><span class="ruby-operator">|</span> <span class="ruby-node">"Finalizer on #{id}"</span>
<span class="ruby-comment cmt">#$log_final.info "closing query"</span>
<span class="ruby-constant">Redland</span><span class="ruby-operator">::</span><span class="ruby-identifier">librdf_free_query</span>(<span class="ruby-identifier">query</span>)
}
<span class="ruby-keyword kw">end</span>
</pre></div>
</div>
</div>
<div id="method-M000033" class="method-detail"><a name="M000033" id="M000033"></a>
<div class="method-heading"><a href="#M000033" class="method-signature"><span class="method-name">new</span><span class="method-args">(query,language=nil,uri=nil,base_uri=nil)</span></a></div>
<div class="method-description">
<p>Constructor - create a <a href="Query.html#M000033">new</a> <a href="Query.html">Query</a> object query - the query string language - the name of the query language uri - the URI identifying the query language</p>
<p><a class="source-toggle" href="#" onclick="toggleCode('M000033-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000033-source">
<pre>
<span class="ruby-comment cmt"># File rdf/redland/query.rb, line 17</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">query</span>,<span class="ruby-identifier">language</span>=<span class="ruby-keyword kw">nil</span>,<span class="ruby-identifier">uri</span>=<span class="ruby-keyword kw">nil</span>,<span class="ruby-identifier">base_uri</span>=<span class="ruby-keyword kw">nil</span>)
<span class="ruby-ivar">@language</span> = <span class="ruby-identifier">language</span>
<span class="ruby-ivar">@uri</span> = <span class="ruby-identifier">uri</span>
<span class="ruby-ivar">@query</span> = <span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_new_query</span>(<span class="ruby-identifier">$world</span>.<span class="ruby-identifier">world</span>,<span class="ruby-identifier">language</span>,<span class="ruby-identifier">uri</span>,<span class="ruby-identifier">query</span>,<span class="ruby-identifier">base_uri</span>)
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">if</span> <span class="ruby-keyword kw">not</span> <span class="ruby-ivar">@query</span>
<span class="ruby-constant">ObjectSpace</span>.<span class="ruby-identifier">define_finalizer</span>(<span class="ruby-keyword kw">self</span>,<span class="ruby-constant">Query</span>.<span class="ruby-identifier">create_finalizer</span>(<span class="ruby-ivar">@query</span>))
<span class="ruby-keyword kw">end</span>
</pre></div>
</div>
</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000034" class="method-detail"><a name="M000034" id="M000034"></a>
<div class="method-heading"><a href="#M000034" class="method-signature"><span class="method-name">execute</span><span class="method-args">(model)</span></a></div>
<div class="method-description">
<p>Execute a query on a model</p>
<p><a class="source-toggle" href="#" onclick="toggleCode('M000034-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000034-source">
<pre>
<span class="ruby-comment cmt"># File rdf/redland/query.rb, line 26</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">execute</span>(<span class="ruby-identifier">model</span>)
<span class="ruby-identifier">results</span>=<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_execute</span>(<span class="ruby-ivar">@query</span>,<span class="ruby-identifier">model</span>.<span class="ruby-identifier">model</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-keyword kw">not</span> <span class="ruby-identifier">results</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-constant">QueryResults</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">results</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
</pre></div>
</div>
</div>
</div>
</div>
<hr />
<div class="outerHeader">
Go to <a href="/" target="_parent">Redland Home</a> -
<a href="/bindings/" target="_parent">Language Bindings Home</a> -
<a href="/docs/ruby.html" target="_parent">Ruby API Home</a>
</div>
<p>(C) Copyright 2004-2011 <a href="http://www.dajobe.org/" target="_parent">Dave Beckett</a>, (C) Copyright 2004-2005 <a href="http://www.bristol.ac.uk/" target="_parent">University of Bristol</a></p>
</div> <!-- end outerBlock -->
</body>
</html>