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<h1>simple-context-item.cpp</h1>This example parses a document and sets it as the context item. It then executes an XQuery expression that navigates relative to the context item.<p>
<div class="fragment"><pre class="fragment"><span class="preprocessor">#include &lt;iostream&gt;</span>
<span class="preprocessor">#include &lt;<a class="code" href="xqilla-simple_8hpp.html">xqilla/xqilla-simple.hpp</a>&gt;</span>
<span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[]) {
<span class="comment">// Initialise Xerces-C and XQilla by creating the factory object</span>
<a name="_a0"></a><a class="code" href="classXQilla.html" title="Provides factory methods for creating XQQuery and DynamicContext objects.">XQilla</a> xqilla;
<a name="_a5"></a><a class="code" href="classXQilla.html">XQilla</a> xqilla;
<span class="comment">// Parse an XQuery expression</span>
<span class="comment">// (AutoDelete deletes the object at the end of the scope)</span>
<a name="_a1"></a><a class="code" href="classAutoDelete.html">AutoDelete&lt;XQQuery&gt;</a> query(xqilla.<a name="a2"></a><a class="code" href="classXQilla.html#39c596fdbef7dd8d2bb2339eb017e10d" title="Parse the expression contained in the given query string.">parse</a>(X(<span class="stringliteral">"foo/bar/@baz"</span>)));
<a name="_a6"></a><a class="code" href="classAutoDelete.html">AutoDelete&lt;XQQuery&gt;</a> query(xqilla.<a name="a7"></a><a class="code" href="classXQilla.html#z1_0">parse</a>(X(<span class="stringliteral">"foo/bar/@baz"</span>)));
<span class="comment">// Create a context object</span>
<a class="code" href="classAutoDelete.html">AutoDelete&lt;DynamicContext&gt;</a> context(query-&gt;createDynamicContext());
<span class="comment">// Parse a document, and set it as the context item</span>
<a name="_a3"></a><a class="code" href="classSequence.html" title="An eagerly evaluated result of a query execution.">Sequence</a> seq = context-&gt;resolveDocument(X(<span class="stringliteral">"foo.xml"</span>));
<span class="keywordflow">if</span>(!seq.isEmpty() &amp;&amp; seq.first()-&gt;isNode()) {
context-&gt;setContextItem(seq.first());
<a name="_a8"></a><a class="code" href="classSequence.html">Sequence</a> seq = context-&gt;resolveDocument(X(<span class="stringliteral">"foo.xml"</span>));
<span class="keywordflow">if</span>(!seq.<a name="a9"></a><a class="code" href="classSequence.html#a24">isEmpty</a>() &amp;&amp; seq.<a name="a10"></a><a class="code" href="classSequence.html#a8">first</a>()-&gt;isNode()) {
context-&gt;setContextItem(seq.<a class="code" href="classSequence.html#a8">first</a>());
context-&gt;setContextPosition(1);
context-&gt;setContextSize(1);
}
<span class="comment">// Execute the query, using the context</span>
<a name="_a4"></a><a class="code" href="classResult.html" title="A scoped pointer wrapper for the lazily evaluated query result.">Result</a> result = query-&gt;execute(context);
<a name="_a11"></a><a class="code" href="classResult.html">Result</a> result = query-&gt;execute(context);
<span class="comment">// Iterate over the results, printing them</span>
<a name="_a5"></a><a class="code" href="classRefCountPointer.html" title="Super class of all the reference counted wrappers for Items.">Item::Ptr</a> item;
<a name="_a12"></a><a class="code" href="classRefCountPointer.html">Item::Ptr</a> item;
<span class="keywordflow">while</span>(item = result-&gt;next(context)) {
std::cout &lt;&lt; UTF8(item-&gt;asString(context)) &lt;&lt; std::endl;
}
<span class="keywordflow">return</span> 0;
}
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<hr size="1"><address style="text-align: right;"><small>Generated on Mon Jan 5 19:53:54 2009 for XQilla Simple API by&nbsp;
</pre></div> <hr size="1"><address style="align: right;"><small>Generated on Fri Sep 25 06:55:26 2009 for XQilla Simple API by&nbsp;
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