67 lines
4.7 KiB
HTML
67 lines
4.7 KiB
HTML
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<title>XQilla Simple API Documentation</title>
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<a style="float:right;" href="http://sourceforge.net/projects/xqilla"><img src="http://sflogo.sourceforge.net/sflogo.php?group_id=152021&type=2" border="0" alt="SourceForge.net Logo" /></a>
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<li><a href="index.html"><span>Main Page</span></a></li>
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<li><a href="annotated.html"><span>Classes</span></a></li>
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<li><a href="examples.html"><span>Examples</span></a></li>
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<div class="header">
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<div class="headertitle">
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<div class="title">simple-context-item.cpp</div> </div>
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<div class="contents">
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<p>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>
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<div class="fragment"><div class="line"><span class="preprocessor">#include <iostream></span></div>
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<div class="line"><span class="preprocessor">#include <<a class="code" href="xqilla-simple_8hpp.html">xqilla/xqilla-simple.hpp</a>></span></div>
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<div class="line"><span class="preprocessor">#include <<a class="code" href="Sequence_8hpp.html">xqilla/runtime/Sequence.hpp</a>></span></div>
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<div class="line"></div>
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<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[]) {</div>
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<div class="line"> <span class="comment">// Initialise Xerces-C and XQilla by creating the factory object</span></div>
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<div class="line"> <a name="_a0"></a><a class="code" href="classXQilla.html">XQilla</a> xqilla;</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Parse an XQuery expression</span></div>
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<div class="line"> <span class="comment">// (AutoDelete deletes the object at the end of the scope)</span></div>
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<div class="line"> <a name="_a1"></a><a class="code" href="classAutoDelete.html">AutoDelete<XQQuery></a> query(xqilla.<a name="a2"></a><a class="code" href="classXQilla.html#a7475d47b7b2fc51434ba9a381431f7ec">parse</a>(X(<span class="stringliteral">"foo/bar/@baz"</span>)));</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Create a context object</span></div>
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<div class="line"> <a class="code" href="classAutoDelete.html">AutoDelete<DynamicContext></a> context(query->createDynamicContext());</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Parse a document, and set it as the context item</span></div>
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<div class="line"> <a name="_a3"></a><a class="code" href="classSequence.html">Sequence</a> seq = context->resolveDocument(X(<span class="stringliteral">"foo.xml"</span>));</div>
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<div class="line"> <span class="keywordflow">if</span>(!seq.isEmpty() && seq.first()->isNode()) {</div>
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<div class="line"> context->setContextItem(seq.first());</div>
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<div class="line"> context->setContextPosition(1);</div>
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<div class="line"> context->setContextSize(1);</div>
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<div class="line"> }</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Execute the query, using the context</span></div>
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<div class="line"> <a name="_a4"></a><a class="code" href="classResult.html">Result</a> result = query->execute(context);</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Iterate over the results, printing them</span></div>
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<div class="line"> <a name="_a5"></a><a class="code" href="classRefCountPointer.html">Item::Ptr</a> item;</div>
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<div class="line"> <span class="keywordflow">while</span>(item = result-><a name="a6"></a><a class="code" href="classResultImpl.html#a4820c3c36a27975b1b704b903d2d1c5f">next</a>(context)) {</div>
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<div class="line"> std::cout << UTF8(item-><a name="a7"></a><a class="code" href="classItem.html#aeefef8ff091f935f4c81b53031582561">asString</a>(context)) << std::endl;</div>
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<div class="line"> }</div>
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<div class="line"></div>
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<div class="line"> <span class="keywordflow">return</span> 0;</div>
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<div class="line">}</div>
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