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Copy JSON from SandBox to trunk
This commit is contained in:
Franky Braem
736
JSON/src/Template.cpp
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736
JSON/src/Template.cpp
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@@ -0,0 +1,736 @@
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//
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// Template.cpp
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//
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// $Id$
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//
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// Library: JSON
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// Package: JSON
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// Module: Template
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//
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// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Poco/File.h"
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#include "Poco/FileStream.h"
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#include "Poco/JSON/Template.h"
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#include "Poco/JSON/TemplateCache.h"
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#include "Poco/JSON/Query.h"
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namespace Poco
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{
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namespace JSON
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{
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POCO_IMPLEMENT_EXCEPTION(JSONTemplateException, Exception, "Template Exception")
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class Part
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{
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public:
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Part()
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{
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}
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virtual ~Part()
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{
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}
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virtual void render(const DynamicAny& data, std::ostream& out) const = 0;
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typedef std::vector<SharedPtr<Part> > VectorParts;
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};
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class StringPart : public Part
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{
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public:
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StringPart() : Part()
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{
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}
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StringPart(const std::string& content) : Part(), _content(content)
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{
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}
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virtual ~StringPart()
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{
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}
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void render(const DynamicAny& data, std::ostream& out) const
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{
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out << _content;
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}
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void setContent(const std::string& content)
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{
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_content = content;
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}
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inline std::string getContent() const
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{
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return _content;
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}
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private:
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std::string _content;
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};
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class MultiPart : public Part
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{
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public:
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MultiPart()
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{
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}
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virtual ~MultiPart()
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{
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}
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virtual void addPart(Part* part)
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{
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_parts.push_back(part);
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}
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void render(const DynamicAny& data, std::ostream& out) const
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{
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for(VectorParts::const_iterator it = _parts.begin(); it != _parts.end(); ++it)
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{
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(*it)->render(data, out);
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}
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}
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protected:
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VectorParts _parts;
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};
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class EchoPart : public Part
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{
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public:
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EchoPart(const std::string& query) : Part(), _query(query)
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{
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}
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virtual ~EchoPart()
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{
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}
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void render(const DynamicAny& data, std::ostream& out) const
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{
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Query query(data);
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DynamicAny value = query.find(_query);
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if ( ! value.isEmpty() )
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{
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out << value.convert<std::string>();
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}
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}
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private:
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std::string _query;
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};
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class LogicQuery
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{
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public:
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LogicQuery(const std::string& query) : _queryString(query)
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{
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}
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virtual ~LogicQuery()
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{
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}
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virtual bool apply(const DynamicAny& data) const
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{
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bool logic = false;
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Query query(data);
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DynamicAny value = query.find(_queryString);
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if ( ! value.isEmpty() ) // When empty, logic will be false
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{
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if ( value.isString() )
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// An empty string must result in false, otherwise true
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// Which is not the case when we convert to bool with DynamicAny
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{
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std::string s = value.convert<std::string>();
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logic = ! s.empty();
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}
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else
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{
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// All other values, try to convert to bool
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// An empty object or array will turn into false
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// all other values depend on the convert<> in DynamicAny
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logic = value.convert<bool>();
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}
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}
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return logic;
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}
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protected:
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std::string _queryString;
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};
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class LogicExistQuery : public LogicQuery
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{
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public:
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LogicExistQuery(const std::string& query) : LogicQuery(query)
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{
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}
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virtual ~LogicExistQuery()
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{
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}
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virtual bool apply(const DynamicAny& data) const
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{
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Query query(data);
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DynamicAny value = query.find(_queryString);
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return !value.isEmpty();
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}
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};
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class LogicElseQuery : public LogicQuery
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{
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public:
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LogicElseQuery() : LogicQuery("")
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{
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}
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virtual ~LogicElseQuery()
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{
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}
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virtual bool apply(const DynamicAny& data) const
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{
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return true;
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}
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};
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class LogicPart : public MultiPart
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{
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public:
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LogicPart() : MultiPart()
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{
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}
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virtual ~LogicPart()
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{
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}
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void addPart(LogicQuery* query, Part* part)
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{
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MultiPart::addPart(part);
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_queries.push_back(query);
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}
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void addPart(Part* part)
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{
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MultiPart::addPart(part);
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_queries.push_back(new LogicElseQuery());
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}
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void render(const DynamicAny& data, std::ostream& out) const
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{
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int count = 0;
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for(std::vector<SharedPtr<LogicQuery> >::const_iterator it = _queries.begin(); it != _queries.end(); ++it, ++count)
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{
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if( (*it)->apply(data) && _parts.size() > count )
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{
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_parts[count]->render(data, out);
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break;
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}
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}
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}
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private:
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std::vector<SharedPtr<LogicQuery> > _queries;
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};
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class LoopPart : public MultiPart
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{
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public:
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LoopPart(const std::string& name, const std::string& query) : MultiPart(), _name(name), _query(query)
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{
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}
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virtual ~LoopPart()
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{
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}
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void render(const DynamicAny& data, std::ostream& out) const
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{
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Query query(data);
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if ( data.type() == typeid(Object::Ptr) )
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{
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Object::Ptr dataObject = data.extract<Object::Ptr>();
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Array::Ptr array = query.findArray(_query);
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if ( ! array.isNull() )
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{
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for(int i = 0; i < array->size(); i++)
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{
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DynamicAny value = array->get(i);
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dataObject->set(_name, value);
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MultiPart::render(data, out);
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}
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dataObject->remove(_name);
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}
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}
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}
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private:
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std::string _name;
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std::string _query;
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};
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class IncludePart : public Part
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{
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public:
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IncludePart(const Path& parentPath, const Path& path)
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: Part()
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, _path(path)
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{
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// When the path is relative, try to make it absolute based
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// on the path of the parent template. When the file doesn't
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// exist, we keep it relative and hope that the cache can
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// resolve it.
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if ( _path.isRelative() )
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{
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Path templatePath(parentPath, _path);
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File templateFile(templatePath);
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if ( templateFile.exists() )
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{
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_path = templatePath;
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}
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}
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}
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virtual ~IncludePart()
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{
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}
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void render(const DynamicAny& data, std::ostream& out) const
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{
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TemplateCache* cache = TemplateCache::instance();
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if ( cache == NULL )
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{
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Template tpl(_path);
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tpl.parse();
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tpl.render(data, out);
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}
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else
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{
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Template::Ptr tpl = cache->getTemplate(_path);
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tpl->render(data, out);
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}
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}
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private:
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Path _path;
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};
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Template::Template(const Path& templatePath)
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: _parts(NULL)
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, _templatePath(templatePath)
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{
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}
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Template::Template()
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: _parts(NULL)
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{
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}
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Template::~Template()
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{
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if ( _parts != NULL )
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{
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delete _parts;
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}
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}
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void Template::parse()
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{
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File file(_templatePath);
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if ( file.exists() )
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{
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FileInputStream fis(_templatePath.toString());
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parse(fis);
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}
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}
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void Template::parse(std::istream& in)
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{
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_parseTime.update();
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_parts = new MultiPart();
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_currentPart = _parts;
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while(in.good())
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{
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std::string text = readText(in); // Try to read text first
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if ( text.length() > 0 )
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{
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_currentPart->addPart(new StringPart(text));
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}
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if ( in.bad() )
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break; // Nothing to do anymore
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std::string command = readTemplateCommand(in); // Try to read a template command
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if ( command.empty() )
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{
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break;
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}
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readWhiteSpace(in);
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if ( command.compare("echo") == 0 )
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{
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std::string query = readQuery(in);
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||||
if ( query.empty() )
|
||||
{
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||||
throw JSONTemplateException("Missing query in <? echo ?>");
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||||
}
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||||
_currentPart->addPart(new EchoPart(query));
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||||
}
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else if ( command.compare("for") == 0 )
|
||||
{
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||||
std::string loopVariable = readWord(in);
|
||||
if ( loopVariable.empty() )
|
||||
{
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throw JSONTemplateException("Missing variable in <? for ?> command");
|
||||
}
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||||
readWhiteSpace(in);
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|
||||
std::string query = readQuery(in);
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||||
if ( query.empty() )
|
||||
{
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throw JSONTemplateException("Missing query in <? for ?> command");
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||||
}
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||||
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_partStack.push(_currentPart);
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LoopPart* part = new LoopPart(loopVariable, query);
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_partStack.push(part);
|
||||
_currentPart->addPart(part);
|
||||
_currentPart = part;
|
||||
}
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||||
else if ( command.compare("else") == 0 )
|
||||
{
|
||||
if ( _partStack.size() == 0 )
|
||||
{
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throw JSONTemplateException("Unexpected <? else ?> found");
|
||||
}
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||||
_currentPart = _partStack.top();
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||||
LogicPart* lp = dynamic_cast<LogicPart*>(_currentPart);
|
||||
if ( lp == NULL )
|
||||
{
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||||
throw JSONTemplateException("Missing <? if ?> or <? ifexist ?> for <? else ?>");
|
||||
}
|
||||
MultiPart* part = new MultiPart();
|
||||
lp->addPart(part);
|
||||
_currentPart = part;
|
||||
}
|
||||
else if ( command.compare("elsif") == 0
|
||||
|| command.compare("elif") == 0 )
|
||||
{
|
||||
std::string query = readQuery(in);
|
||||
if ( query.empty() )
|
||||
{
|
||||
throw JSONTemplateException("Missing query in <? " + command + " ?>");
|
||||
}
|
||||
|
||||
if ( _partStack.size() == 0 )
|
||||
{
|
||||
throw JSONTemplateException("Unexpected <? elsif / elif ?> found");
|
||||
}
|
||||
|
||||
_currentPart = _partStack.top();
|
||||
LogicPart* lp = dynamic_cast<LogicPart*>(_currentPart);
|
||||
if ( lp == NULL )
|
||||
{
|
||||
throw JSONTemplateException("Missing <? if ?> or <? ifexist ?> for <? elsif / elif ?>");
|
||||
}
|
||||
MultiPart* part = new MultiPart();
|
||||
lp->addPart(new LogicQuery(query), part);
|
||||
_currentPart = part;
|
||||
}
|
||||
else if ( command.compare("endfor") == 0 )
|
||||
{
|
||||
if ( _partStack.size() < 2 )
|
||||
{
|
||||
throw JSONTemplateException("Unexpected <? endfor ?> found");
|
||||
}
|
||||
MultiPart* loopPart = _partStack.top();
|
||||
LoopPart* lp = dynamic_cast<LoopPart*>(loopPart);
|
||||
if ( lp == NULL )
|
||||
{
|
||||
throw JSONTemplateException("Missing <? for ?> command");
|
||||
}
|
||||
_partStack.pop();
|
||||
_currentPart = _partStack.top();
|
||||
_partStack.pop();
|
||||
}
|
||||
else if ( command.compare("endif") == 0 )
|
||||
{
|
||||
if ( _partStack.size() < 2 )
|
||||
{
|
||||
throw JSONTemplateException("Unexpected <? endif ?> found");
|
||||
}
|
||||
|
||||
_currentPart = _partStack.top();
|
||||
LogicPart* lp = dynamic_cast<LogicPart*>(_currentPart);
|
||||
if ( lp == NULL )
|
||||
{
|
||||
throw JSONTemplateException("Missing <? if ?> or <? ifexist ?> for <? endif ?>");
|
||||
}
|
||||
|
||||
_partStack.pop();
|
||||
_currentPart = _partStack.top();
|
||||
_partStack.pop();
|
||||
}
|
||||
else if ( command.compare("if") == 0
|
||||
|| command.compare("ifexist") == 0 )
|
||||
{
|
||||
std::string query = readQuery(in);
|
||||
if ( query.empty() )
|
||||
{
|
||||
throw JSONTemplateException("Missing query in <? " + command + " ?>");
|
||||
}
|
||||
_partStack.push(_currentPart);
|
||||
LogicPart* lp = new LogicPart();
|
||||
_partStack.push(lp);
|
||||
_currentPart->addPart(lp);
|
||||
_currentPart = new MultiPart();
|
||||
if ( command.compare("ifexist") == 0 )
|
||||
{
|
||||
lp->addPart(new LogicExistQuery(query), _currentPart);
|
||||
}
|
||||
else
|
||||
{
|
||||
lp->addPart(new LogicQuery(query), _currentPart);
|
||||
}
|
||||
}
|
||||
else if ( command.compare("include") == 0 )
|
||||
{
|
||||
readWhiteSpace(in);
|
||||
std::string filename = readString(in);
|
||||
if ( filename.empty() )
|
||||
{
|
||||
throw JSONTemplateException("Missing filename in <? include ?>");
|
||||
}
|
||||
else
|
||||
{
|
||||
Path resolvePath(_templatePath);
|
||||
resolvePath.makeParent();
|
||||
_currentPart->addPart(new IncludePart(resolvePath, filename));
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
throw JSONTemplateException("Unknown command " + command);
|
||||
}
|
||||
|
||||
readWhiteSpace(in);
|
||||
|
||||
int c = in.get();
|
||||
if ( c == '?' && in.peek() == '>' )
|
||||
{
|
||||
in.get(); // forget '>'
|
||||
|
||||
if ( command.compare("echo") != 0 )
|
||||
{
|
||||
if ( in.peek() == '\r' )
|
||||
{
|
||||
in.get();
|
||||
}
|
||||
if ( in.peek() == '\n' )
|
||||
{
|
||||
in.get();
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
throw JSONTemplateException("Missing ?>");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
std::string Template::readText(std::istream& in)
|
||||
{
|
||||
std::string text;
|
||||
int c = in.get();
|
||||
while(c != -1)
|
||||
{
|
||||
if ( c == '<' )
|
||||
{
|
||||
if ( in.peek() == '?' )
|
||||
{
|
||||
in.get(); // forget '?'
|
||||
break;
|
||||
}
|
||||
}
|
||||
text += c;
|
||||
|
||||
c = in.get();
|
||||
}
|
||||
return text;
|
||||
}
|
||||
|
||||
|
||||
std::string Template::readTemplateCommand(std::istream& in)
|
||||
{
|
||||
std::string command;
|
||||
|
||||
readWhiteSpace(in);
|
||||
|
||||
int c = in.get();
|
||||
while(c != -1)
|
||||
{
|
||||
if ( Ascii::isSpace(c) )
|
||||
break;
|
||||
|
||||
if ( c == '?' && in.peek() == '>' )
|
||||
{
|
||||
in.putback(c);
|
||||
break;
|
||||
}
|
||||
|
||||
if ( c == '=' && command.length() == 0 )
|
||||
{
|
||||
command = "echo";
|
||||
break;
|
||||
}
|
||||
|
||||
command += c;
|
||||
|
||||
c = in.get();
|
||||
}
|
||||
|
||||
return command;
|
||||
}
|
||||
|
||||
|
||||
std::string Template::readWord(std::istream& in)
|
||||
{
|
||||
std::string word;
|
||||
int c;
|
||||
while((c = in.peek()) != -1 && ! Ascii::isSpace(c))
|
||||
{
|
||||
in.get();
|
||||
word += c;
|
||||
}
|
||||
return word;
|
||||
}
|
||||
|
||||
|
||||
std::string Template::readQuery(std::istream& in)
|
||||
{
|
||||
std::string word;
|
||||
int c;
|
||||
while((c = in.get()) != -1)
|
||||
{
|
||||
if ( c == '?' && in.peek() == '>' )
|
||||
{
|
||||
in.putback(c);
|
||||
break;
|
||||
}
|
||||
|
||||
if ( Ascii::isSpace(c) )
|
||||
{
|
||||
break;
|
||||
}
|
||||
word += c;
|
||||
}
|
||||
return word;
|
||||
}
|
||||
|
||||
|
||||
void Template::readWhiteSpace(std::istream& in)
|
||||
{
|
||||
int c;
|
||||
while((c = in.peek()) != -1 && Ascii::isSpace(c))
|
||||
{
|
||||
in.get();
|
||||
}
|
||||
}
|
||||
|
||||
std::string Template::readString(std::istream& in)
|
||||
{
|
||||
std::string str;
|
||||
|
||||
int c = in.get();
|
||||
if ( c == '"' )
|
||||
{
|
||||
while((c = in.get()) != -1 && c != '"')
|
||||
{
|
||||
str += c;
|
||||
}
|
||||
}
|
||||
return str;
|
||||
}
|
||||
|
||||
void Template::render(const DynamicAny& data, std::ostream& out) const
|
||||
{
|
||||
_parts->render(data, out);
|
||||
}
|
||||
|
||||
}} // Namespace Poco::JSON
|
||||
Reference in New Issue
Block a user