70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/*
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* Copyright (c) 2001, 2008,
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* DecisionSoft Limited. All rights reserved.
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* Copyright (c) 2004, 2018 Oracle and/or its affiliates. All rights reserved.
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*
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _OPTIMIZER_HPP
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#define _OPTIMIZER_HPP
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#include <xqilla/framework/XQillaExport.hpp>
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class ASTNode;
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class DynamicContext;
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class XQQuery;
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class XQUserFunction;
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class XQILLA_API Optimizer
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{
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public:
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Optimizer(Optimizer *parent = 0);
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virtual ~Optimizer();
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void startOptimize(XQQuery *query);
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ASTNode *startOptimize(ASTNode *item);
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XQUserFunction *startOptimize(XQUserFunction *item);
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void reset();
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protected:
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virtual void optimize(XQQuery *query) = 0;
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virtual ASTNode *optimize(ASTNode *item) = 0;
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virtual XQUserFunction *optimizeFunctionDef(XQUserFunction *item) = 0;
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virtual void resetInternal();
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private:
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Optimizer(const Optimizer &o);
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Optimizer &operator=(const Optimizer &o);
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Optimizer *parent_;
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};
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class XQILLA_API StaticResolver : public Optimizer
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{
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public:
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StaticResolver(DynamicContext *xpc, Optimizer *parent = 0)
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: Optimizer(parent), xpc_(xpc) {}
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protected:
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virtual void optimize(XQQuery *query);
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virtual ASTNode *optimize(ASTNode *item);
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virtual XQUserFunction *optimizeFunctionDef(XQUserFunction *item);
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private:
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DynamicContext *xpc_;
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};
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#endif
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