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<?xml version="1.0" encoding="utf-8"?>
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<title>Redland RDF Language Bindings - Ruby RDoc - Class: Redland::QueryResults</title>
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<h1 class="class">Redland::QueryResults</h1>
<div id="description" class="description">
<p>This class provides query language results support</p>
</div>
<!-- description -->
<div id="5Buntitled-5D" class="documentation-section"><!-- Attributes -->
<div id="attribute-method-details" class="method-section section">
<h3 class="section-header">Attributes</h3>
<div id="results-attribute-method" class="method-detail"><a name="results" id="results"></a>
<div class="method-heading attribute-method-heading"><span class="method-name">results</span><span class="attribute-access-type">[R]</span></div>
<div class="method-description"></div>
</div>
</div>
<!-- attribute-method-details -->
<!-- Methods -->
<div id="public-class-method-details" class="method-section section">
<h3 class="section-header">Public Class Methods</h3>
<div id="create_finalizer-method" class="method-detail"><a name="method-c-create_finalizer" id="method-c-create_finalizer"></a>
<div class="method-heading"><span class="method-name">create_finalizer</span><span class="method-args">(results)</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>You shouldn't use this. Used internally for cleanup.</p>
<div class="method-source-code" id="create_finalizer-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 17</span>
<span class="ruby-keyword">def</span> <span class="ruby-constant">QueryResults</span>.<span class="ruby-identifier">create_finalizer</span>(<span class="ruby-identifier">results</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-comment"># "Finalizer on #{id}"</span>
<span class="ruby-comment">#$log_final.info "closing results"</span>
<span class="ruby-constant">Redland</span><span class="ruby-operator">::</span><span class="ruby-identifier">librdf_free_query_results</span>(<span class="ruby-identifier">results</span>)
}
<span class="ruby-keyword">end</span>
</pre></div>
<!-- create_finalizer-source --></div>
</div>
<!-- create_finalizer-method -->
<div id="new-method" class="method-detail"><a name="method-c-new" id="method-c-new"></a>
<div class="method-heading"><span class="method-name">new</span><span class="method-args">(object)</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>this is not a public constructor</p>
<div class="method-source-code" id="new-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 11</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">object</span>)
<span class="ruby-ivar">@results</span> = <span class="ruby-identifier">object</span>
<span class="ruby-constant">ObjectSpace</span>.<span class="ruby-identifier">define_finalizer</span>(<span class="ruby-keyword">self</span>,<span class="ruby-constant">QueryResults</span>.<span class="ruby-identifier">create_finalizer</span>(<span class="ruby-ivar">@results</span>))
<span class="ruby-keyword">end</span>
</pre></div>
<!-- new-source --></div>
</div>
<!-- new-method --></div>
<!-- public-class-method-details -->
<div id="public-instance-method-details" class="method-section section">
<h3 class="section-header">Public Instance Methods</h3>
<div id="as_stream-method" class="method-detail"><a name="method-i-as_stream" id="method-i-as_stream"></a>
<div class="method-heading"><span class="method-name">as_stream</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get a new <a href="Stream.html">Stream</a> object representing the query results as an RDF Graph.</p>
<div class="method-source-code" id="as_stream-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 92</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">as_stream</span>
<span class="ruby-identifier">my_stream</span>=<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_as_stream</span>(<span class="ruby-ivar">@results</span>)
<span class="ruby-keyword">return</span> <span class="ruby-constant">Stream</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">my_stream</span>, <span class="ruby-keyword">self</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- as_stream-source --></div>
</div>
<!-- as_stream-method -->
<div id="binding_name-method" class="method-detail"><a name="method-i-binding_name" id="method-i-binding_name"></a>
<div class="method-heading"><span class="method-name">binding_name</span><span class="method-args">(index)</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get binding name for the current result</p>
<div class="method-source-code" id="binding_name-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 45</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">binding_name</span>(<span class="ruby-identifier">index</span>)
<span class="ruby-keyword">return</span> <span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_binding_name</span>(<span class="ruby-ivar">@results</span>,<span class="ruby-identifier">index</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- binding_name-source --></div>
</div>
<!-- binding_name-method -->
<div id="binding_names-method" class="method-detail"><a name="method-i-binding_names" id="method-i-binding_names"></a>
<div class="method-heading"><span class="method-name">binding_names</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get the names all of the variable bindings as an array</p>
<div class="method-source-code" id="binding_names-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 50</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">binding_names</span>
<span class="ruby-identifier">count</span>=<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_bindings_count</span>(<span class="ruby-ivar">@results</span>)
<span class="ruby-identifier">names</span>=[]
<span class="ruby-keyword">for</span> <span class="ruby-identifier">i</span> <span class="ruby-keyword">in</span> <span class="ruby-value">0</span><span class="ruby-operator">..</span><span class="ruby-identifier">count</span><span class="ruby-operator">-</span><span class="ruby-value">1</span>
<span class="ruby-identifier">names</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">binding_name</span>(<span class="ruby-identifier">i</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">return</span> <span class="ruby-identifier">names</span>
<span class="ruby-keyword">end</span>
</pre></div>
<!-- binding_names-source --></div>
</div>
<!-- binding_names-method -->
<div id="binding_value-method" class="method-detail"><a name="method-i-binding_value" id="method-i-binding_value"></a>
<div class="method-heading"><span class="method-name">binding_value</span><span class="method-args">(index)</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get one binding value for the current result</p>
<div class="method-source-code" id="binding_value-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 60</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">binding_value</span>(<span class="ruby-identifier">index</span>)
<span class="ruby-identifier">node</span> = <span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_binding_value</span>(<span class="ruby-ivar">@results</span>,<span class="ruby-identifier">index</span>)
<span class="ruby-keyword">return</span> <span class="ruby-identifier">node</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">?</span> <span class="ruby-keyword">nil</span> <span class="ruby-operator">:</span> <span class="ruby-constant">Node</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">node</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- binding_value-source --></div>
</div>
<!-- binding_value-method -->
<div id="binding_value_by_name-method" class="method-detail"><a name="method-i-binding_value_by_name" id="method-i-binding_value_by_name"></a>
<div class="method-heading"><span class="method-name">binding_value_by_name</span><span class="method-args">(name)</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get the value of the variable binding name in the current query result.</p>
<div class="method-source-code" id="binding_value_by_name-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 76</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">binding_value_by_name</span>(<span class="ruby-identifier">name</span>)
<span class="ruby-identifier">node</span>=<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_binding_value_by_name</span>(<span class="ruby-ivar">@results</span>,<span class="ruby-identifier">name</span>)
<span class="ruby-keyword">return</span> <span class="ruby-identifier">node</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">?</span> <span class="ruby-keyword">nil</span> <span class="ruby-operator">:</span> <span class="ruby-constant">Node</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">node</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- binding_value_by_name-source --></div>
</div>
<!-- binding_value_by_name-method -->
<div id="binding_values-method" class="method-detail"><a name="method-i-binding_values" id="method-i-binding_values"></a>
<div class="method-heading"><span class="method-name">binding_values</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get an array of all the values of all of the variable bindings in the current query result.</p>
<div class="method-source-code" id="binding_values-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 66</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">binding_values</span>
<span class="ruby-identifier">count</span>=<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_bindings_count</span>(<span class="ruby-ivar">@results</span>)
<span class="ruby-identifier">values</span>=[]
<span class="ruby-keyword">for</span> <span class="ruby-identifier">i</span> <span class="ruby-keyword">in</span> <span class="ruby-value">0</span><span class="ruby-operator">..</span><span class="ruby-identifier">count</span><span class="ruby-operator">-</span><span class="ruby-value">1</span>
<span class="ruby-identifier">values</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">binding_value</span>(<span class="ruby-identifier">i</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">return</span> <span class="ruby-identifier">values</span>
<span class="ruby-keyword">end</span>
</pre></div>
<!-- binding_values-source --></div>
</div>
<!-- binding_values-method -->
<div id="bindings-method" class="method-detail"><a name="method-i-bindings" id="method-i-bindings"></a>
<div class="method-heading"><span class="method-name">bindings</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get an array of binding values</p>
<div class="method-source-code" id="bindings-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 82</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">bindings</span>
(<span class="ruby-value">0</span><span class="ruby-operator">...</span><span class="ruby-keyword">self</span>.<span class="ruby-identifier">size</span>).<span class="ruby-identifier">each</span>{<span class="ruby-operator">|</span><span class="ruby-identifier">i</span><span class="ruby-operator">|</span> <span class="ruby-identifier">binding_value</span>( <span class="ruby-identifier">i</span> ) }
<span class="ruby-keyword">end</span>
</pre></div>
<!-- bindings-source --></div>
</div>
<!-- bindings-method -->
<div id="bindings_count-method" class="method-detail"><a name="method-i-bindings_count" id="method-i-bindings_count"></a>
<div class="method-heading"><span class="method-name">bindings_count</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get number of binding variables</p>
<div class="method-source-code" id="bindings_count-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 40</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">bindings_count</span>
<span class="ruby-keyword">return</span> <span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_bindings_count</span>(<span class="ruby-ivar">@results</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- bindings_count-source --></div>
</div>
<!-- bindings_count-method -->
<div id="count-method" class="method-detail"><a name="method-i-count" id="method-i-count"></a>
<div class="method-heading"><span class="method-name">count</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get the number of results so far</p>
<div class="method-source-code" id="count-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 30</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">count</span>
<span class="ruby-keyword">return</span> <span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_count</span>(<span class="ruby-ivar">@results</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- count-source --></div>
</div>
<!-- count-method -->
<div id="finished-3F-method" class="method-detail"><a name="method-i-finished-3F" id="method-i-finished-3F"></a>
<div class="method-heading"><span class="method-name">finished?</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Test if the results are finished</p>
<div class="method-source-code" id="finished-3F-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 35</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">finished?</span>
<span class="ruby-keyword">return</span> (<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_finished</span>(<span class="ruby-ivar">@results</span>) <span class="ruby-operator">!=</span> <span class="ruby-value">0</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- finished-3F-source --></div>
</div>
<!-- finished-3F-method -->
<div id="get_boolean-3F-method" class="method-detail"><a name="method-i-get_boolean-3F" id="method-i-get_boolean-3F"></a>
<div class="method-heading"><span class="method-name">get_boolean?</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get the boolean query result</p>
<div class="method-source-code" id="get_boolean-3F-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 139</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">get_boolean?</span>()
<span class="ruby-keyword">return</span> (<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_boolean</span>(<span class="ruby-ivar">@results</span>) <span class="ruby-operator">!=</span> <span class="ruby-value">0</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- get_boolean-3F-source --></div>
</div>
<!-- get_boolean-3F-method -->
<div id="is_bindings-3F-method" class="method-detail"><a name="method-i-is_bindings-3F" id="method-i-is_bindings-3F"></a>
<div class="method-heading"><span class="method-name">is_bindings?</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Test if is variable bindings result</p>
<div class="method-source-code" id="is_bindings-3F-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 124</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">is_bindings?</span>()
<span class="ruby-keyword">return</span> (<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_is_bindings</span>(<span class="ruby-ivar">@results</span>) <span class="ruby-operator">!=</span> <span class="ruby-value">0</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- is_bindings-3F-source --></div>
</div>
<!-- is_bindings-3F-method -->
<div id="is_boolean-3F-method" class="method-detail"><a name="method-i-is_boolean-3F" id="method-i-is_boolean-3F"></a>
<div class="method-heading"><span class="method-name">is_boolean?</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Test if is a boolean result</p>
<div class="method-source-code" id="is_boolean-3F-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 129</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">is_boolean?</span>()
<span class="ruby-keyword">return</span> (<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_is_boolean</span>(<span class="ruby-ivar">@results</span>) <span class="ruby-operator">!=</span> <span class="ruby-value">0</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- is_boolean-3F-source --></div>
</div>
<!-- is_boolean-3F-method -->
<div id="is_graph-3F-method" class="method-detail"><a name="method-i-is_graph-3F" id="method-i-is_graph-3F"></a>
<div class="method-heading"><span class="method-name">is_graph?</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Test if is an RDF graph result</p>
<div class="method-source-code" id="is_graph-3F-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 134</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">is_graph?</span>()
<span class="ruby-keyword">return</span> (<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_is_graph</span>(<span class="ruby-ivar">@results</span>) <span class="ruby-operator">!=</span> <span class="ruby-value">0</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- is_graph-3F-source --></div>
</div>
<!-- is_graph-3F-method -->
<div id="next-method" class="method-detail"><a name="method-i-next" id="method-i-next"></a>
<div class="method-heading"><span class="method-name">next</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Move to the next query result</p>
<div class="method-source-code" id="next-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 87</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">next</span>
<span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_next</span>(<span class="ruby-ivar">@results</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- next-source --></div>
</div>
<!-- next-method -->
<div id="size-method" class="method-detail"><a name="method-i-size" id="method-i-size"></a>
<div class="method-heading"><span class="method-name">size</span><span class="method-args">()</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Get the number of results so far</p>
<div class="method-source-code" id="size-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 25</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">size</span>
<span class="ruby-keyword">return</span> <span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_get_count</span>(<span class="ruby-ivar">@results</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- size-source --></div>
</div>
<!-- size-method -->
<div id="to_string-method" class="method-detail"><a name="method-i-to_string" id="method-i-to_string"></a>
<div class="method-heading"><span class="method-name">to_string</span><span class="method-args">(format_uri = nil, base_uri = nil)</span> <span class="method-click-advice">click to toggle source</span></div>
<div class="method-description">
<p>Serialize to a string syntax in format_uri using the optional base_uri. The default format when none is given is determined by librdf_query_results_to_string</p>
<div class="method-source-code" id="to_string-source">
<pre>
<span class="ruby-comment"># File rdf/redland/queryresults.rb, line 100</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">to_string</span>(<span class="ruby-identifier">format_uri</span> = <span class="ruby-keyword">nil</span>, <span class="ruby-identifier">base_uri</span> = <span class="ruby-keyword">nil</span>)
<span class="ruby-keyword">if</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier">is_graph?</span>()
<span class="ruby-identifier">tmpmodel</span>=<span class="ruby-constant">Model</span>.<span class="ruby-identifier">new</span>()
<span class="ruby-identifier">tmpmodel</span>.<span class="ruby-identifier">add_statements</span>(<span class="ruby-keyword">self</span>.<span class="ruby-identifier">as_stream</span>())
<span class="ruby-identifier">serializer</span>=<span class="ruby-constant">Serializer</span>.<span class="ruby-identifier">new</span>()
<span class="ruby-keyword">return</span> <span class="ruby-identifier">serializer</span>.<span class="ruby-identifier">model_to_string</span>(<span class="ruby-identifier">base_uri</span>, <span class="ruby-identifier">tmpmodel</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">if</span> <span class="ruby-keyword">not</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier">is_boolean?</span>() <span class="ruby-keyword">and</span> <span class="ruby-keyword">not</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier">is_bindings?</span>()
<span class="ruby-identifier">raise</span> <span class="ruby-constant">RedlandError</span>.<span class="ruby-identifier">new</span>(<span class="ruby-string">"Unknown query result format cannot be written as a string"</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">format_uri</span>
<span class="ruby-identifier">format_uri</span> = <span class="ruby-identifier">format_uri</span>.<span class="ruby-identifier">uri</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">base_uri</span>
<span class="ruby-identifier">base_uri</span> = <span class="ruby-identifier">base_uri</span>.<span class="ruby-identifier">uri</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">return</span> <span class="ruby-constant">Redland</span>.<span class="ruby-identifier">librdf_query_results_to_string</span>(<span class="ruby-ivar">@results</span>, <span class="ruby-identifier">format_uri</span>, <span class="ruby-identifier">base_uri</span>)
<span class="ruby-keyword">end</span>
</pre></div>
<!-- to_string-source --></div>
</div>
<!-- to_string-method --></div>
<!-- public-instance-method-details --></div>
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