80 lines
2.1 KiB
C++
80 lines
2.1 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 _STACKFRAME_HPP
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#define _STACKFRAME_HPP
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#include <string>
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#include <xqilla/framework/XQillaExport.hpp>
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#include <xqilla/items/Item.hpp>
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#include <xercesc/util/XercesDefs.hpp>
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class ASTNode;
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class TupleNode;
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class LocationInfo;
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class DynamicContext;
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class EventHandler;
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class Sequence;
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class VariableStore;
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XERCES_CPP_NAMESPACE_BEGIN
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class DOMXPathNSResolver;
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XERCES_CPP_NAMESPACE_END
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/**
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* A class that represents an item in a query call stack
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*/
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class XQILLA_API StackFrame
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{
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public:
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virtual ~StackFrame() {}
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const LocationInfo *getLocationInfo() const { return location_; }
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const StackFrame *getPreviousFrame() const { return prev_; }
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virtual Sequence query(const XMLCh *query) const;
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virtual void query(const XMLCh *query, EventHandler *events) const;
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virtual const ASTNode *getASTNode() const = 0;
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virtual const TupleNode *getTupleNode() const = 0;
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virtual std::string getQueryPlan() const = 0;
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protected:
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StackFrame(const LocationInfo *location, DynamicContext *context);
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const LocationInfo *location_;
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DynamicContext *context_;
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Item::Ptr contextItem_;
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size_t contextPosition_;
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size_t contextSize_;
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const VariableStore *variables_;
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const XERCES_CPP_NAMESPACE_QUALIFIER DOMXPathNSResolver *nsResolver_;
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const XMLCh *defaultElementNS_;
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const StackFrame *prev_;
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private:
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StackFrame(const StackFrame &);
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StackFrame &operator=(const StackFrame&);
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};
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#endif
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