85 lines
1.9 KiB
C++
85 lines
1.9 KiB
C++
/*
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* Copyright (c) 2001-2006
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* DecisionSoft Limited. All rights reserved.
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* Copyright (c) 2004-2006
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* Progress Software Corporation. All rights reserved.
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* Copyright (c) 2004-2006
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* Oracle. All rights reserved.
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*
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* See the file LICENSE for redistribution information.
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*
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* $Id: XQStep.hpp,v 1.11 2006/11/01 16:37:11 jpcs Exp $
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*/
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#ifndef _XQSTEP_HPP
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#define _XQSTEP_HPP
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#include <xqilla/framework/XQillaExport.hpp>
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#include <xqilla/ast/ASTNodeImpl.hpp>
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class NodeTest;
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///this class calculates a node list based on a context
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class XQILLA_API XQStep : public ASTNodeImpl
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{
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public:
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enum Axis {
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ANCESTOR,
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ANCESTOR_OR_SELF,
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ATTRIBUTE,
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CHILD,
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DESCENDANT,
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DESCENDANT_OR_SELF,
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FOLLOWING,
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FOLLOWING_SIBLING,
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NAMESPACE,
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PARENT,
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PRECEDING,
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PRECEDING_SIBLING,
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SELF
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};
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//constuctor that takes the step this XQ is refuring to
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XQStep(Axis axis, NodeTest* nodeTest, XPath2MemoryManager* memMgr);
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~XQStep();
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virtual ASTNode* staticResolution(StaticContext *context);
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virtual ASTNode *staticTyping(StaticContext *context);
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virtual Result createResult(DynamicContext* context, int flags=0) const;
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const NodeTest *getNodeTest() const;
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void setNodeTest(NodeTest *nodeTest);
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Axis getAxis() const;
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void setAxis(Axis axis);
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static bool isForwardAxis(Axis axis);
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static unsigned int getAxisProperties(Axis axis);
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private:
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NodeTest* nodeTest_;
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Axis axis_;
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};
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/**
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* Lazily apply an axis and NodeTest filter to the context node
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*/
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class XQILLA_API StepResult : public ResultImpl
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{
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public:
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StepResult(XQStep::Axis axis, const NodeTest *nt, const LocationInfo *location);
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virtual ~StepResult() {}
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Item::Ptr next(DynamicContext *context);
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std::string asString(DynamicContext *context, int indent) const;
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protected:
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bool toDo_;
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Result result_;
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XQStep::Axis axis_;
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const NodeTest *nodeTest_;
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};
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#endif
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