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https://github.com/jezhiggins/arabica
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pulled out a seperate function resolver for Standard XPath functions
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Jez Higgins
parent
4e29877ac1
commit
67c5ae7846
1 changed files with 77 additions and 47 deletions
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@ -15,6 +15,77 @@ namespace impl
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template<class function_type, class string_type, class string_adaptor>
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XPathFunction<string_type, string_adaptor>* CreateFn(const std::vector<XPathExpression<string_type, string_adaptor> >& argExprs) { return new function_type(argExprs); }
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template<class string_type, class string_adaptor>
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class StandardXPathFunctionResolver
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{
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public:
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virtual ~StandardXPathFunctionResolver() { }
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virtual XPathFunction<string_type, string_adaptor>*
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resolveFunction(const string_type& namespace_uri,
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const string_type& name,
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const std::vector<XPathExpression<string_type, string_adaptor> >& argExprs) const
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{
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if(!string_adaptor::empty(namespace_uri))
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return 0;
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return standardFunction(name, argExprs);
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} // resolveFuncton
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static XPathFunction<string_type, string_adaptor>*
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standardFunction(const string_type& name,
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const std::vector<XPathExpression<string_type, string_adaptor> >& argExprs)
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{
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for(const NamedFunction* fn = FunctionLookupTable; fn->name != 0; ++fn)
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if(name == string_adaptor::construct_from_utf8(fn->name))
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return fn->creator(argExprs);
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return 0;
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} // standardFunction
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private:
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typedef XPathFunction<string_type, string_adaptor>* (*CreateFnPtr)(const std::vector<XPathExpression<string_type, string_adaptor> >& argExprs);
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struct NamedFunction { const char* name; CreateFnPtr creator; };
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static const NamedFunction FunctionLookupTable[];
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}; // class StandardXPathFunctionResolver
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template<class string_type, class string_adaptor>
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const typename StandardXPathFunctionResolver<string_type, string_adaptor>::NamedFunction
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StandardXPathFunctionResolver<string_type, string_adaptor>::FunctionLookupTable[] =
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{ // node-set functions
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{ "position", CreateFn<PositionFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "last", CreateFn<LastFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "count", CreateFn<CountFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "local-name", CreateFn<LocalNameFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "namespace-uri", CreateFn<NamespaceURIFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "name", CreateFn<NameFn<string_type, string_adaptor>, string_type, string_adaptor> },
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// string functions
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{"string", CreateFn<StringFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"concat", CreateFn<ConcatFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"starts-with", CreateFn<StartsWithFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"contains", CreateFn<ContainsFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"substring-before", CreateFn<SubstringBeforeFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"substring-after", CreateFn<SubstringAfterFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"substring", CreateFn<SubstringFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"string-length", CreateFn<StringLengthFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"normalize-space", CreateFn<NormalizeSpaceFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"translate", CreateFn<TranslateFn<string_type, string_adaptor>, string_type, string_adaptor> },
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// boolean functions
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{"boolean", CreateFn<BooleanFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"not", CreateFn<NotFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"true", CreateFn<TrueFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"false", CreateFn<FalseFn<string_type, string_adaptor>, string_type, string_adaptor> },
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// number functions
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{"number", CreateFn<NumberFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"sum", CreateFn<SumFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"floor", CreateFn<FloorFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"ceiling", CreateFn<CeilingFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"round", CreateFn<RoundFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{0, 0}
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};
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template<class string_type, class string_adaptor>
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class FunctionHolder : public XPathExpression_impl<string_type, string_adaptor>
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{
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@ -49,13 +120,13 @@ public:
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const std::vector<XPathExpression<string_type, string_adaptor> >& argExprs,
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const CompilationContext<string_type, string_adaptor>& context)
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{
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if(string_adaptor::empty(namespace_uri))
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for(const NamedFunction* fn = FunctionLookupTable; fn->name != 0; ++fn)
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if(name == string_adaptor::construct_from_utf8(fn->name))
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return new FunctionHolder(fn->creator(argExprs), namespace_uri, name);
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XPathFunction<string_type, string_adaptor>* func = 0;
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if(string_adaptor::empty(namespace_uri))
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func = StandardXPathFunctionResolver<string_type, string_adaptor>::standardFunction(name, argExprs);
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if(func == 0)
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func = context.functionResolver().resolveFunction(namespace_uri, name, argExprs);
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XPathFunction<string_type, string_adaptor>* func =
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context.functionResolver().resolveFunction(namespace_uri, name, argExprs);
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if(func == 0)
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{
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string_type error;
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@ -76,49 +147,8 @@ private:
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XPathFunction<string_type, string_adaptor>* func_;
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string_type namespace_uri_;
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string_type name_;
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typedef XPathFunction<string_type, string_adaptor>* (*CreateFnPtr)(const std::vector<XPathExpression<string_type, string_adaptor> >& argExprs);
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struct NamedFunction { const char* name; CreateFnPtr creator; };
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static const NamedFunction FunctionLookupTable[];
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}; // class FunctionHolder
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template<class string_type, class string_adaptor>
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const typename FunctionHolder<string_type, string_adaptor>::NamedFunction
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FunctionHolder<string_type, string_adaptor>::FunctionLookupTable[] =
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{ // node-set functions
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{ "position", CreateFn<PositionFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "last", CreateFn<LastFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "count", CreateFn<CountFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "local-name", CreateFn<LocalNameFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "namespace-uri", CreateFn<NamespaceURIFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{ "name", CreateFn<NameFn<string_type, string_adaptor>, string_type, string_adaptor> },
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// string functions
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{"string", CreateFn<StringFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"concat", CreateFn<ConcatFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"starts-with", CreateFn<StartsWithFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"contains", CreateFn<ContainsFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"substring-before", CreateFn<SubstringBeforeFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"substring-after", CreateFn<SubstringAfterFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"substring", CreateFn<SubstringFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"string-length", CreateFn<StringLengthFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"normalize-space", CreateFn<NormalizeSpaceFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"translate", CreateFn<TranslateFn<string_type, string_adaptor>, string_type, string_adaptor> },
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// boolean functions
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{"boolean", CreateFn<BooleanFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"not", CreateFn<NotFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"true", CreateFn<TrueFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"false", CreateFn<FalseFn<string_type, string_adaptor>, string_type, string_adaptor> },
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// number functions
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{"number", CreateFn<NumberFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"sum", CreateFn<SumFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"floor", CreateFn<FloorFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"ceiling", CreateFn<CeilingFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{"round", CreateFn<RoundFn<string_type, string_adaptor>, string_type, string_adaptor> },
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{0, 0}
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};
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} // namespace impl
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} // namespace XPath
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} // namespace Arabica
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