/// <summary>
/// Converts the specified source.
/// </summary>
/// <param name="source">The source.</param>
/// <returns></returns>
protected ExpressionConversionResult Convert(ExpressionConversionResult source)
{
this.result = new ExpressionConversionResult(source);
Expression expression = this.Visit(source.Expression);
this.result.SetResultExpression(expression);
return(this.result);
}
/// <summary>
/// Converts the specified expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="annotations">The annotations.</param>
/// <param name="metadataMapping">The metadata mapping.</param>
/// <returns></returns>
public static ExpressionConversionResult Convert(Expression expression, ExpressionResourceAnnotations annotations, DSPMetadata metadataMapping)
{
Debug.Assert(annotations != null, "annotations != null");
Debug.Assert(metadataMapping != null, "metadataMapping != null");
expression = ResourceAnnotationVisitor.Convert(expression, annotations);
ExpressionConversionResult result = ConvertInnerExpression(expression, annotations, metadataMapping);
expression = ExpressionSimplifier.Simplify(result.Expression);
result.SetResultExpression(expression);
return(result);
}
/// <summary>
/// Returns an enumerator that iterates through the collection.
/// </summary>
/// <returns>
/// A <see cref="T:System.Collections.Generic.IEnumerator`1"></see> that can be used to iterate through the collection.
/// </returns>
public IEnumerator <T> GetEnumerator()
{
ExpressionConversionResult result = this.queryProvider.ConvertExpression(this.queryExpression);
IQueryable query = this.queryProvider.CreateSourceQuery(result.Expression);
if (this.queryProvider.Context.DbEntityProvider.Log != null)
{
this.queryProvider.Context.DbEntityProvider.Log.WriteLine("DSPIQALinqQuery Underlying: {0}", query.ToString());
Trace.WriteLine("Underlying: " + query.ToString());
}
return((IEnumerator <T>)query.GetEnumerator());
}
/// <summary>
/// Converts the inner expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="annotations">The annotations.</param>
/// <param name="contextMapping">The context mapping.</param>
/// <returns></returns>
private static ExpressionConversionResult ConvertInnerExpression(
Expression expression,
ExpressionResourceAnnotations annotations,
DSPMetadata contextMapping)
{
Debug.Assert(expression != null, "expression != null");
Debug.Assert(annotations != null, "annotations != null");
Debug.Assert(contextMapping != null, "contextMapping != null");
ExpressionConversionResult result = new ExpressionConversionResult(expression);
FilterConverter filterConverter = new FilterConverter(annotations, contextMapping);
result = filterConverter.Convert(result);
return(result);
}
/// <summary>
/// Converts the expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <returns></returns>
internal ExpressionConversionResult ConvertExpression(Expression expression)
{
if (this.context.DbEntityProvider.Log != null)
{
this.context.DbEntityProvider.Log.WriteLine("ConvertExpression Before: {0}", expression.ToString());
Trace.WriteLine("Before: " + expression.ToString());
}
ExpressionConversionResult result = ExpressionConverter.Convert(expression, this.ExpressionAnnotations, this.Context.ContextMapping);
if (this.context.DbEntityProvider.Log != null)
{
this.context.DbEntityProvider.Log.WriteLine("ConvertExpression After: {0}", result.Expression.ToString());
Trace.WriteLine("After: " + result.Expression.ToString());
}
return(result);
}
/// <summary>
/// Initializes a new instance of the <see cref="ExpressionConversionResult"/> class.
/// </summary>
/// <param name="source">The source.</param>
public ExpressionConversionResult(ExpressionConversionResult source)
{
this.expression = source.expression;
this.queryResultsProcessor = source.queryResultsProcessor;
}