dc2ce796cb
The method is needed to convert a SyncReport into an in-memory string. The problem is that it is uncertain when writing is complete. This patch solves this by intercepting the deletion of the ostream via a boost::shared_ptr destructor which then copies the content of the stream into the shared data buffer.
62 lines
2 KiB
C++
62 lines
2 KiB
C++
/*
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* Copyright (C) 2008-2009 Patrick Ohly <patrick.ohly@gmx.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) version 3.
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*
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* This library 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef INCL_EVOLUTION_STRING_DATA_BLOB
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# define INCL_EVOLUTION_STRING_DATA_BLOB
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#include <syncevo/DataBlob.h>
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#include <boost/shared_ptr.hpp>
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#include <string>
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#include <syncevo/declarations.h>
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SE_BEGIN_CXX
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/**
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* Stores data chunk in memory.
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* Ownership of that memory is shared.
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*/
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class StringDataBlob : public DataBlob
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{
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std::string m_name;
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boost::shared_ptr<std::string> m_data;
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bool m_readonly;
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public:
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/**
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* @param name name for the data blob
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* @param data reference to string holding data, NULL pointer if it doesn't exist
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* @param readonly true if write() is meant to fail
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*/
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StringDataBlob(const std::string &name,
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const boost::shared_ptr<std::string> &data,
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bool readonly);
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/** writing ends and data is updated when the ostream pointer is destructed */
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virtual boost::shared_ptr<std::ostream> write();
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virtual boost::shared_ptr<std::istream> read();
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virtual boost::shared_ptr<std::string> getData() { return m_data; }
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virtual std::string getName() const { return m_name; }
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virtual bool exists() const { return m_data; }
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virtual bool isReadonly() const { return m_readonly; }
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};
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SE_END_CXX
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#endif // INCL_EVOLUTION_STRING_DATA_BLOB
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