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< div class = "title" > simple-context-item.cpp< / div > < / div >
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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 >
< div class = "fragment" > < div class = "line" > < span class = "preprocessor" > #include < iostream> < / span > < / div >
< div class = "line" > < span class = "preprocessor" > #include < < a class = "code" href = "xqilla-simple_8hpp.html" > xqilla/xqilla-simple.hpp< / a > > < / span > < / div >
< div class = "line" > < span class = "preprocessor" > #include < < a class = "code" href = "Sequence_8hpp.html" > xqilla/runtime/Sequence.hpp< / a > > < / span > < / div >
< div class = "line" > < / div >
< div class = "line" > < span class = "keywordtype" > int< / span > main(< span class = "keywordtype" > int< / span > argc, < span class = "keywordtype" > char< / span > *argv[]) {< / div >
< div class = "line" > < span class = "comment" > // Initialise Xerces-C and XQilla by creating the factory object< / span > < / div >
< div class = "line" > < a name = "_a0" > < / a > < a class = "code" href = "classXQilla.html" > XQilla< / a > xqilla;< / div >
< div class = "line" > < / div >
< div class = "line" > < span class = "comment" > // Parse an XQuery expression< / span > < / div >
< div class = "line" > < span class = "comment" > // (AutoDelete deletes the object at the end of the scope)< / span > < / div >
< 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 >
< div class = "line" > < / div >
< div class = "line" > < span class = "comment" > // Create a context object< / span > < / div >
< div class = "line" > < a class = "code" href = "classAutoDelete.html" > AutoDelete< DynamicContext> < / a > context(query-> createDynamicContext());< / div >
< div class = "line" > < / div >
< div class = "line" > < span class = "comment" > // Parse a document, and set it as the context item< / span > < / div >
< 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 >
< div class = "line" > < span class = "keywordflow" > if< / span > (!seq.isEmpty() & & seq.first()-> isNode()) {< / div >
< div class = "line" > context-> setContextItem(seq.first());< / div >
< div class = "line" > context-> setContextPosition(1);< / div >
< div class = "line" > context-> setContextSize(1);< / div >
< div class = "line" > }< / div >
< div class = "line" > < / div >
< div class = "line" > < span class = "comment" > // Execute the query, using the context< / span > < / div >
< div class = "line" > < a name = "_a4" > < / a > < a class = "code" href = "classResult.html" > Result< / a > result = query-> execute(context);< / div >
< div class = "line" > < / div >
< div class = "line" > < span class = "comment" > // Iterate over the results, printing them< / span > < / div >
< div class = "line" > < a name = "_a5" > < / a > < a class = "code" href = "classRefCountPointer.html" > Item::Ptr< / a > item;< / div >
< 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 >
< div class = "line" > std::cout < < UTF8(item-> < a name = "a7" > < / a > < a class = "code" href = "classItem.html#aeefef8ff091f935f4c81b53031582561" > asString< / a > (context)) < < std::endl;< / div >
< div class = "line" > }< / div >
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< div class = "line" > < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > }< / div >
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