153 lines
4.6 KiB
C++
153 lines
4.6 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 _STATICANALYSIS_HPP
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#define _STATICANALYSIS_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 <vector>
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class XPath2MemoryManager;
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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 StaticAnalysis
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{
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public:
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static const int HASH_SIZE = 13;
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class XQILLA_API VarEntry
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{
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public:
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VarEntry() : uri(0), name(0), hash(0), prev(0) {}
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void set(const XMLCh *u, const XMLCh *n);
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void set(const XMLCh *u, const XMLCh *n, size_t h);
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const XMLCh *uri, *name;
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size_t hash;
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VarEntry *prev;
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};
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StaticAnalysis(XPath2MemoryManager* memMgr);
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StaticAnalysis(const StaticAnalysis &o, XPath2MemoryManager* memMgr);
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void copy(const StaticAnalysis &o);
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void release();
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/// Clears all the information in this StaticAnalysis
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void clear();
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void clearExceptType();
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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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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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bool isVariableUsed() const;
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VarEntry **variablesUsed() const;
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/** Sets the members of this StaticAnalysis from the given StaticAnalysis */
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void add(const StaticAnalysis &o);
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void addExceptContextFlags(const StaticAnalysis &o);
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void addExceptVariable(const XMLCh *namespaceURI, const XMLCh *name, const StaticAnalysis &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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void updating(bool value);
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bool isUpdating() const;
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void possiblyUpdating(bool value);
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bool isPossiblyUpdating() 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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UNDEFINEDVAR = 0x080 ///< 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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StaticAnalysis(const StaticAnalysis &o);
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StaticAnalysis &operator=(const StaticAnalysis &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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bool _updating;
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bool _possiblyUpdating;
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unsigned int _properties;
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StaticType _staticType;
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VarEntry *_dynamicVariables[HASH_SIZE];
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VarEntry *_recycle;
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XPath2MemoryManager *_memMgr;
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};
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#endif
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