/*
 * Copyright (c) 2001, DecisionSoft Limited All rights reserved.
 * Please see LICENSE.TXT for more information.
 */

#ifndef _DATAITEMCASTABLEAS_HPP
#define _DATAITEMCASTABLEAS_HPP

#include <pathan/Pathan.hpp>

#include <pathan/dataItem/DataItemImpl.hpp>

class SequenceType;

class PATHAN_EXPORT DataItemCastableAs : public DataItemImpl
{
public:
	DataItemCastableAs(DataItem* expr, SequenceType* exprType, XPath2MemoryManager* memMgr);

	virtual Sequence collapseTreeInternal(DynamicContext* context, int flags=0) const;

	/**
	 * Called during static analysis to determine if statically correct.  If
	 *  not an appropriate error is thrown.
	 */
	virtual DataItem* staticResolution(StaticContext *context, StaticResolutionContext *src);

  const DataItem *getExpression() const;
  const SequenceType *getSequenceType() const;

  void setExpression(DataItem *item);

protected:
	DataItem* _expr;
	SequenceType* _exprType;
};

#endif // _DATAITEMCASTABLEAS_HPP