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https://github.com/The-OpenROAD-Project/OpenDB.git
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84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// BSD 3-Clause License
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//
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// Copyright (c) 2019, Nefelus Inc
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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
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// modification, are permitted provided that the following conditions are met:
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//
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// * 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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// * 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
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// and/or other materials provided with the distribution.
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//
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// * Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include "ZObject.h"
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#include "odb.h"
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namespace odb {
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class ZContext;
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class ZObject;
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class ZFactory;
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///
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/// ZFactory - Class factory interface
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///
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class ZFactory
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{
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public:
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//
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// Return values:
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// Z_OK - Object created
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// Z_ERROR_NO_INTERFACE - Object not created because it does not
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// support the specified interface.
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//
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virtual int create(const ZContext& context, ZInterfaceID iid, void** p) = 0;
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};
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///
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/// ZFactoryImpl - A singleton class which creates instances of the
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/// implementation class.
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///
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template <class IMPL, class INFC>
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class ZFactoryImpl : public ZFactory
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{
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public:
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int create(const ZContext& context, ZInterfaceID iid, void** p)
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{
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IMPL* o = new IMPL;
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o->_context = context;
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if (o->QueryInterface(iid, p) == Z_OK)
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return Z_OK;
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delete o;
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*p = NULL;
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return Z_ERROR_NO_INTERFACE;
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}
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};
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} // namespace odb
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