berryExpression.h

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/*============================================================================
 
The Medical Imaging Interaction Toolkit (MITK)
 
Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.
 
Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.
 
============================================================================*/
 
#ifndef BERRYEXPRESSION_H_
#define BERRYEXPRESSION_H_
 
#include "berryExpressionInfo.h"
#include "berryIEvaluationContext.h"
#include "berryEvaluationResult.h"
#include <org_blueberry_core_expressions_Export.h>
 
#include <berryMacros.h>
#include <berryObject.h>
 
 
namespace berry {
 
class BERRY_EXPRESSIONS Expression : public Object {
 
 
public:
  berryObjectMacro(Expression);
 
  static const uint HASH_CODE_NOT_COMPUTED;
 
  static const uint HASH_FACTOR;
 
  static const QString ATT_VALUE;
 
private:
 
  mutable uint fHashCode;
 
protected:
 
  static bool Equals(const QList<Expression::Pointer>& leftArray,
                     const QList<Expression::Pointer>& rightArray);
 
  static bool Equals(const QList<Object::Pointer>& leftArray,
                     const QList<Object::Pointer>& rightArray);
 
   static uint HashCode(Expression::Pointer object);
 
  static uint HashCode(const QList<Expression::Pointer>& array);
 
  static uint HashCode(const QList<Object::Pointer>& array);
 
  virtual uint ComputeHashCode() const;
 
 
public:
 
  static const Expression::Pointer TRUE_EVAL;
 
  static const Expression::Pointer FALSE_EVAL;
 
  Expression();
  ~Expression() override;
 
  uint HashCode() const override;
 
  virtual SmartPointer<const EvaluationResult> Evaluate(IEvaluationContext* context) const = 0;
 
  virtual const ExpressionInfo* ComputeExpressionInfo() const;
 
  virtual void CollectExpressionInfo(ExpressionInfo* info) const;
 
  QString ToString() const override;
 
  bool operator==(const Object* object) const override;
 
};
 
class TRUE_EVALExpression : public Expression
{
public:
  SmartPointer<const EvaluationResult> Evaluate(IEvaluationContext* /*context*/) const override
  {
      return EvaluationResult::TRUE_EVAL;
  }
 
  void CollectExpressionInfo(ExpressionInfo* /*info*/) const override {}
};
 
class FALSE_EVALExpression : public Expression
{
public:
  SmartPointer<const EvaluationResult> Evaluate(IEvaluationContext* /*context*/) const override
  {
      return EvaluationResult::FALSE_EVAL;
  }
 
  void CollectExpressionInfo(ExpressionInfo* /*info*/) const override {}
};
 
} // namespace berry
 
#endif /*BERRYEXPRESSION_H_*/