88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/*
|
|
* Copyright (c) 2001-2006
|
|
* DecisionSoft Limited. All rights reserved.
|
|
* Copyright (c) 2004-2006
|
|
* Progress Software Corporation. All rights reserved.
|
|
* Copyright (c) 2004-2006
|
|
* Oracle. All rights reserved.
|
|
*
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* $Id: ASTNodeImpl.hpp,v 1.10 2006/11/01 16:37:11 jpcs Exp $
|
|
*/
|
|
|
|
#ifndef _ASTNODEIMPL_HPP
|
|
#define _ASTNODEIMPL_HPP
|
|
|
|
class DynamicContext;
|
|
class Numeric;
|
|
|
|
#include <xqilla/ast/ASTNode.hpp>
|
|
#include <xqilla/runtime/Result.hpp>
|
|
#include <xqilla/runtime/LazySequenceResult.hpp>
|
|
#include <xqilla/ast/StaticResolutionContext.hpp>
|
|
|
|
/** class which is used as base for all the different data types */
|
|
class XQILLA_API ASTNodeImpl : public ASTNode
|
|
{
|
|
public:
|
|
ASTNodeImpl(XPath2MemoryManager* memMgr);
|
|
virtual ~ASTNodeImpl();
|
|
|
|
ASTNode::whichType getType(void) const;
|
|
|
|
/** Returns true if this ASTNode is an instance of XQSequence or XQLiteral */
|
|
virtual bool isConstant() const;
|
|
/** Returns true if this ASTNode has no predicates, and is an instance of
|
|
XQSequence or XQLiteral. If the literal value of this ASTNode
|
|
is a single DateOrTimeType, then !hasTimezone() on it must return true,
|
|
otherwise this method will return false. */
|
|
virtual bool isDateOrTimeAndHasNoTimezone(StaticContext* context) const;
|
|
|
|
virtual bool isSingleNumericConstant(StaticContext *context) const;
|
|
|
|
///calls createResult
|
|
virtual Result collapseTree(DynamicContext* context, int flags=0) const;
|
|
|
|
/**
|
|
* Can be overridden by derived classes. Default implementation returns a
|
|
* SequenceResult made from the Sequence returned by collapseTreeInternal.
|
|
*/
|
|
virtual Result createResult(DynamicContext* context, int flags=0) const;
|
|
|
|
/**
|
|
* Collapse the compiled expression based on context. Default implementation
|
|
* returns an empty sequence.
|
|
*/
|
|
virtual Sequence collapseTreeInternal(DynamicContext* context, int flags=0) const;
|
|
|
|
/** Performs constant folding on this ASTNode. */
|
|
ASTNode *constantFold(StaticContext *context);
|
|
|
|
virtual const StaticResolutionContext &getStaticResolutionContext() const;
|
|
|
|
protected:
|
|
void setType(ASTNode::whichType t);
|
|
XPath2MemoryManager* getMemoryManager(void) const;
|
|
|
|
class CollapseTreeInternalResult : public LazySequenceResult
|
|
{
|
|
public:
|
|
CollapseTreeInternalResult(const ASTNodeImpl *di, int flags, DynamicContext *context);
|
|
|
|
void getResult(Sequence &toFill, DynamicContext *context) const;
|
|
std::string asString(DynamicContext *context, int indent) const;
|
|
|
|
private:
|
|
int _flags;
|
|
const ASTNodeImpl *_di;
|
|
};
|
|
|
|
StaticResolutionContext _src;
|
|
|
|
private:
|
|
whichType _type;
|
|
XPath2MemoryManager* _memMgr;
|
|
};
|
|
|
|
#endif
|