129 lines
4.2 KiB
C++
129 lines
4.2 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: StaticResolutionContext.hpp,v 1.15 2006/11/01 16:37:11 jpcs Exp $
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*/
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#ifndef _STATICRESOLUTIONCONTEXT_HPP
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#define _STATICRESOLUTIONCONTEXT_HPP
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#include <string>
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#include <xqilla/framework/XQillaExport.hpp>
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#include <xqilla/ast/StaticType.hpp>
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#include <xercesc/util/RefHash2KeysTableOf.hpp>
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#include <xercesc/util/StringPool.hpp>
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#include <vector>
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class XPath2MemoryManager;
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typedef XERCES_CPP_NAMESPACE_QUALIFIER RefHash2KeysTableOf<int> VariableAccessSet;
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typedef XERCES_CPP_NAMESPACE_QUALIFIER RefHash2KeysTableOfEnumerator<int> VariableAccessSetEnumerator;
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/**
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* Records access to various parts of the context during static resolution.
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*/
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class XQILLA_API StaticResolutionContext
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{
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public:
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StaticResolutionContext(XPath2MemoryManager* memMgr);
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StaticResolutionContext(const StaticResolutionContext &o, XPath2MemoryManager* memMgr);
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void copy(const StaticResolutionContext &o);
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/// Clears all the information in this StaticResolutionContext
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void clear();
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/** Overrides all the other flags, and never allows this sub-expression
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to be constant folded. */
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void forceNoFolding(bool value);
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bool isNoFoldingForced() const;
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void contextItemUsed(bool value);
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void contextPositionUsed(bool value);
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void contextSizeUsed(bool value);
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bool isContextItemUsed() const;
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bool isContextPositionUsed() const;
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bool isContextSizeUsed() const;
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/** Returns true if any of the context item flags have been used */
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bool areContextFlagsUsed() const;
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void currentTimeUsed(bool value);
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void implicitTimezoneUsed(bool value);
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bool areContextTimeUsed() const;
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void availableDocumentsUsed(bool value);
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void availableCollectionsUsed(bool value);
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bool areDocsOrCollectionsUsed() const;
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void variableUsed(const XMLCh *namespaceURI, const XMLCh *name);
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bool removeVariable(const XMLCh *namespaceURI, const XMLCh *name);
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bool isVariableUsed(const XMLCh *namespaceURI, const XMLCh *name) const;
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std::vector<std::pair<const XMLCh*, const XMLCh*> > variablesUsed() const;
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/** Sets the members of this StaticResolutionContext from the given StaticResolutionContext */
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void add(const StaticResolutionContext &o);
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void addExceptContextFlags(const StaticResolutionContext &o);
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/** Returns true if flags are set, or variables have been used */
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bool isUsed() const;
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bool isUsedExceptContextFlags() const;
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void creative(bool value);
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bool isCreative() const;
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/**
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* Properties that allow optimisation regarding sorting or not.
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* The values are OR'd as flags, so they must be distinct bits
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*/
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enum Properties {
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DOCORDER = 0x001, ///< Results are returned in document order
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PEER = 0x002, ///< Results do not appear in the descendants of other results
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SUBTREE = 0x004, ///< Results are members of the set of descendants of the context node
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GROUPED = 0x008, ///< Results are grouped by the document they come from
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SAMEDOC = 0x010, ///< Results are from the same document as the context node
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ONENODE = 0x020, ///< Only ever returns one node
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SELF = 0x040, ///< Only ever returns the context node
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FORWARDREF = 0x080, ///< This is a forward reference for a global variable that is declared later
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UNDEFINEDVAR = 0x100 ///< This is a variable that has been undefined
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};
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unsigned int getProperties() const;
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void setProperties(unsigned int props);
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const StaticType &getStaticType() const;
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StaticType &getStaticType();
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std::string toString() const;
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private:
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StaticResolutionContext(const StaticResolutionContext &o);
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StaticResolutionContext &operator=(const StaticResolutionContext &o);
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bool _contextItem;
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bool _contextPosition;
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bool _contextSize;
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bool _currentTime;
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bool _implicitTimezone;
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bool _availableDocuments;
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bool _availableCollections;
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bool _forceNoFolding;
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bool _creative;
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unsigned int _properties;
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StaticType _staticType;
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VariableAccessSet _dynamicVariables;
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XERCES_CPP_NAMESPACE_QUALIFIER XMLStringPool _uriPool;
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XPath2MemoryManager* _memMgr;
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};
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#endif
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