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97 lines
3.7 KiB
97 lines
3.7 KiB
/*
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* Copyright (c) 2011-2015, Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ElementLibrary.h"
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#include "ElementBuilder.h"
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#include <map>
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#include <string>
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#include <memory>
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#include <utility>
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/** Factory that creates an element given an xml element. If no matching builder is found, it uses
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* the default builder.
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*
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* @tparam CDefaultElementBuilder is the class of the element builder to use if no corresponding
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* builder is found for a given xml element.
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*/
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template <class CDefaultElementBuilder>
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class CDefaultElementLibrary : public CElementLibrary
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{
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public:
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~CDefaultElementLibrary() override = default;
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/** Set the default builder used in fallback mechanism.
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* @see createElement() for more detail on this mechanism.
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*
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* @param[in] defaultBuilder if NULL default builder mechanism, else provided builder is used.
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*/
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void setDefaultBuilder(std::unique_ptr<CDefaultElementBuilder> defaultBuilder)
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{
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_defaultBuilder = std::move(defaultBuilder);
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}
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/** Create and return an element instanciated depending on an xmlElement.
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*
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* @param[in] xmlElement: The xml element used to find a matching builder
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*
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* @return If a matching builder is found, return an element created from the builder,
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* otherwise:
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* If the default mechanism is enable (@see enableDefaultMechanism),
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* create the elemen with the default element builder.
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* otherwise, return NULL.
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*/
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CElement *createElement(const CXmlElement &xmlElement) const;
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private:
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std::unique_ptr<CDefaultElementBuilder> _defaultBuilder;
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};
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template <class CDefaultElementBuilder>
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CElement *CDefaultElementLibrary<CDefaultElementBuilder>::createElement(
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const CXmlElement &xmlElement) const
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{
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CElement *builtElement = CElementLibrary::createElement(xmlElement);
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if (builtElement != nullptr) {
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// The element was created, return it
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return builtElement;
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}
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if (_defaultBuilder == nullptr) {
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// The default builder mechanism is not enabled
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return nullptr;
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}
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// Use the default builder
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return _defaultBuilder->createElement(xmlElement);
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}
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