153 lines
4.0 KiB
C++
153 lines
4.0 KiB
C++
//
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// VMime library (http://www.vmime.org)
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// Copyright (C) 2002-2013 Vincent Richard <vincent@vmime.org>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 3 of
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// the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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// Linking this library statically or dynamically with other modules is making
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// a combined work based on this library. Thus, the terms and conditions of
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// the GNU General Public License cover the whole combination.
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//
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#ifndef VMIME_HEADERFIELDFACTORY_HPP_INCLUDED
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#define VMIME_HEADERFIELDFACTORY_HPP_INCLUDED
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#include "vmime/headerField.hpp"
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#include "vmime/utility/stringUtils.hpp"
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namespace vmime
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{
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/** Creates header field and header field value objects.
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*/
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class VMIME_EXPORT headerFieldFactory
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{
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protected:
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headerFieldFactory();
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~headerFieldFactory();
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typedef ref <headerField> (*AllocFunc)(void);
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typedef std::map <string, AllocFunc> NameMap;
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NameMap m_nameMap;
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struct ValueInfo
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{
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typedef ref <headerFieldValue> (*ValueAllocFunc)(void);
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typedef bool (*ValueTypeCheckFunc)(const object&);
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ValueAllocFunc allocFunc;
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ValueTypeCheckFunc checkTypeFunc;
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};
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typedef std::map <string, ValueInfo> ValueMap;
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ValueMap m_valueMap;
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public:
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static headerFieldFactory* getInstance();
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#ifndef VMIME_BUILDING_DOC
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// TYPE must inherit from BASE_TYPE
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template <class BASE_TYPE, class TYPE>
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class registerer
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{
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public:
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static bool checkType(const object& obj)
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{
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const TYPE* typedObj = dynamic_cast <const TYPE*>(&obj);
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return typedObj != NULL;
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}
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static ref <BASE_TYPE> creator()
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{
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// Allocate a new object
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return vmime::create <TYPE>();
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}
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};
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#endif // VMIME_BUILDING_DOC
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/** Register a field type.
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*
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* @param T field class (must inherit from 'headerField')
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* @param name field name (eg. "X-MyField")
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*/
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template <class T>
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void registerField(const string& name)
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{
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m_nameMap.insert(NameMap::value_type
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(utility::stringUtils::toLower(name),
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®isterer <headerField, T>::creator));
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}
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/** Register a field value type.
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*
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* @param T value class (must inherit from 'headerFieldValue')
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* @param name field name
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*/
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template <class T>
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void registerFieldValue(const string& name)
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{
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ValueInfo vi;
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vi.allocFunc = ®isterer <headerFieldValue, T>::creator;
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vi.checkTypeFunc = ®isterer <headerField, T>::checkType;
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m_valueMap.insert(ValueMap::value_type
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(utility::stringUtils::toLower(name), vi));
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}
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/** Create a new field object for the specified field name.
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* If the field name has not been registered, a default type
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* is used.
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*
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* @param name field name
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* @param body string that will be parsed to initialize
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* the value of the field
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* @return a new field object
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*/
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ref <headerField> create(const string& name, const string& body = NULL_STRING);
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/** Create a new field value for the specified field.
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*
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* @param fieldName name of the field for which to create value
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* @return a new value object for the field
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*/
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ref <headerFieldValue> createValue(const string& fieldName);
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/** Returns whether the specified value type is valid for the specified field.
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*
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* @param field header field
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* @param value value for this header field
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* @return true if the value type is compatible with the header field, or
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* false otherwise
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*/
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bool isValueTypeValid(const headerField& field, const headerFieldValue& value) const;
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};
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} // vmime
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#endif // VMIME_HEADERFIELDFACTORY_HPP_INCLUDED
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