/// <summary>
/// Gets the reduced expression.
/// </summary>
/// <param name="expressionRewriter">The expression rewriter.</param>
/// <returns>
/// A <see cref="Expression" />.
/// </returns>
public Expression GetReducedExpression(IExpressionRewriter expressionRewriter)
{
return(expressionRewriter.Rewrite(
this.expression,
this.reduceByBaseUnit,
this.FlatRepresentation.GetConsumer()));
}
protected override void establish_context()
{
base.establish_context();
expression = Expression.Constant(this);
rewriter = MockRepository.GenerateStub<IExpressionRewriter>();
system_under_test.AddRewriter(rewriter);
}
/// <summary>
/// Gets the reduced expression.
/// </summary>
/// <param name="expressionRewriter">The expression rewriter.</param>
/// <returns>
/// A <see cref="Expression" />.
/// </returns>
public Expression GetReducedExpression(IExpressionRewriter expressionRewriter)
{
return expressionRewriter.Rewrite(
this.expression,
this.reduceByBaseUnit,
this.FlatRepresentation.GetConsumer());
}
/// <summary>
/// Initializes a new instance of the <see cref="UnitFactory" /> class.
/// </summary>
/// <param name="expressionToFlatRepresentationConverter">The expression to flat representation converter.</param>
/// <param name="expressionRewriter">The expression rewriter.</param>
/// <param name="derivedUnitRegistry">The derived unit registry.</param>
public UnitFactory(
IExpressionToFlatRepresentationConverter expressionToFlatRepresentationConverter,
IExpressionRewriter expressionRewriter,
IDerivedUnitRegistry derivedUnitRegistry)
{
this.expressionToFlatRepresentationConverter = expressionToFlatRepresentationConverter;
this.expressionRewriter = expressionRewriter;
this.derivedUnitRegistry = derivedUnitRegistry;
}
/// <summary>
/// Rewrites the expression specified by <paramref name="expression"/>
/// with the rewriter specified by <paramref name="rewriter"/>.
/// </summary>
/// <typeparam name="TType">
/// Specifies the parameter type in the expression.
/// </typeparam>
/// <param name="expression">
/// Specifies the expression.
/// </param>
/// <param name="rewriter">
/// Specifies the rewriter.
/// </param>
/// <returns>
/// The converted expression.
/// </returns>
public static Expression <Action <TType> > RewriteUsing <TType>(
this Expression <Action <TType> > expression,
IExpressionRewriter rewriter)
{
Guard.AgainstArgumentNull(expression, "expression");
Guard.AgainstArgumentNull(rewriter, "rewriter");
return(rewriter.Rewrite(expression) as Expression <Action <TType> >);
}
/// <summary>
/// Initializes a new instance of the <see cref="UnitFactory" /> class.
/// </summary>
/// <param name="expressionToFlatRepresentationConverter">The expression to flat representation converter.</param>
/// <param name="expressionRewriter">The expression rewriter.</param>
/// <param name="derivedUnitRegistry">The derived unit registry.</param>
public UnitFactory(
IExpressionToFlatRepresentationConverter expressionToFlatRepresentationConverter,
IExpressionRewriter expressionRewriter,
IDerivedUnitRegistry derivedUnitRegistry)
{
this.expressionToFlatRepresentationConverter = expressionToFlatRepresentationConverter;
this.expressionRewriter = expressionRewriter;
this.derivedUnitRegistry = derivedUnitRegistry;
}
/// <summary>
/// Visits the children of the <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="methodCallExpr">The expression to visit.</param>
/// <returns>
/// The modified expression, if it or any subexpression was modified; otherwise, returns the original
/// expression.
/// </returns>
protected override Expression VisitMethodCall(MethodCallExpression methodCallExpr)
{
RewriterMarkerMethodAttribute markerAttribute = methodCallExpr.Method
.GetCustomAttributes(typeof(RewriterMarkerMethodAttribute), false)
.Cast <RewriterMarkerMethodAttribute>()
.FirstOrDefault();
if (markerAttribute == null)
{
return(base.VisitMethodCall(methodCallExpr));
}
IExpressionRewriter rewriter = markerAttribute.CreateRewriter();
return(Visit(rewriter.RewriteMethodCall(methodCallExpr)));
}
private Expression TransformExpression(
Expression expression,
ITransformationContext context,
TransformationStepRecorder recorder)
{
expression = this.PreprocessExpression(expression, context);
if (context.IsFinished)
{
return(expression);
}
// Set up the rewriter chain
IList <IExpressionRewriter> allRewriters =
new IExpressionRewriter[]
{
new DatabaseParameterRewriter(context),
new StoredProcedureParameterRewriter(context),
}
.Concat(
this.GetRewriters(expression, context))
.Concat(new IExpressionRewriter[]
{
new TableScanRewriter(),
new QueryableRewriter()
})
.ToList();
// Initialize rewriters
foreach (IDatabaseComponent databaseComponent in allRewriters)
{
databaseComponent.Initialize(this.database);
}
// Last chance to alter rewriters
allRewriters = this.ReviewRewriters(allRewriters);
// Record the initial state
recorder.Record(new TransformationStep(expression));
// Execute rewriters
foreach (IExpressionRewriter rewriter in allRewriters)
{
if (rewriter == null)
{
continue;
}
expression = rewriter.Rewrite(expression);
recorder.Record(new TransformationStep(expression));
}
expression = this.PostprocessExpression(expression, context);
recorder.Record(new TransformationStep(expression));
// Reduce the expression
while (expression.CanReduce)
{
expression = expression.Reduce();
recorder.Record(new TransformationStep(expression));
}
return(expression);
}
public ExpressionRewriterTester(Expression expression, IExpressionRewriter transformer)
{
_original = expression;
_rewritten = transformer.Rewrite(expression);
}
/// <summary>
/// Creates a new instance of the <see cref="RewritingFakeEngine" /> class.
/// </summary>
/// <param name="rewriter">
/// Specifies the rewriter that translates the expressions or more
/// specific the generic inline constraints used in expressions
/// to the inline constraints used in the target fake framework.
/// </param>
protected RewritingFakeEngine(IExpressionRewriter rewriter)
{
Guard.AgainstArgumentNull(rewriter, "rewriter");
_rewriter = rewriter;
}