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/*
* Copyright (c) 2003-2023, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @addtogroup report
*/
/**
* @file chain.h
* @author John Wiegley
*
* @ingroup report
*/
#pragma once
#include "utils.h"
namespace ledger {
class post_t;
class account_t;
template <typename T>
class item_handler : public noncopyable
{
protected:
shared_ptr<item_handler> handler;
public:
item_handler() {
TRACE_CTOR(item_handler, "");
}
item_handler(shared_ptr<item_handler> _handler) : handler(_handler) {
TRACE_CTOR(item_handler, "shared_ptr<item_handler>");
}
virtual ~item_handler() {
TRACE_DTOR(item_handler);
}
virtual void title(const string& str) {
if (handler)
handler->title(str);
}
virtual void flush() {
if (handler)
handler->flush();
}
virtual void operator()(T& item) {
if (handler) {
check_for_signal();
(*handler)(item);
}
}
virtual void clear() {
if (handler)
handler->clear();
}
};
typedef shared_ptr<item_handler<post_t> > post_handler_ptr;
typedef shared_ptr<item_handler<account_t> > acct_handler_ptr;
class report_t;
post_handler_ptr
chain_pre_post_handlers(post_handler_ptr base_handler,
report_t& report);
post_handler_ptr
chain_post_handlers(post_handler_ptr base_handler,
report_t& report,
bool for_accounts_report = false);
inline post_handler_ptr
chain_handlers(post_handler_ptr handler,
report_t& report,
bool for_accounts_report = false) {
handler = chain_post_handlers(handler, report, for_accounts_report);
handler = chain_pre_post_handlers(handler, report);
return handler;
}
} // namespace ledger
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