/// <summary>Builds the Uri for the expression passed in.</summary>
/// <param name="e">The expression to translate into a Uri</param>
/// <returns>Query components</returns>
internal QueryComponents Translate(Expression e)
{
Uri uri;
Version version;
bool addTrailingParens = false;
Dictionary <Expression, Expression> normalizerRewrites = null;
// short cut analysis if just a resource set
// note - to be backwards compatible with V1, will only append trailing () for queries
// that include more then just a resource set.
if (!(e is ResourceSetExpression))
{
normalizerRewrites = new Dictionary <Expression, Expression>(ReferenceEqualityComparer <Expression> .Instance);
e = Evaluator.PartialEval(e);
e = ExpressionNormalizer.Normalize(e, normalizerRewrites);
e = ResourceBinder.Bind(e);
addTrailingParens = true;
}
UriWriter.Translate(this.Context, addTrailingParens, e, out uri, out version);
ResourceExpression re = e as ResourceExpression;
Type lastSegmentType = re.Projection == null ? re.ResourceType : re.Projection.Selector.Parameters[0].Type;
LambdaExpression selector = re.Projection == null ? null : re.Projection.Selector;
return(new QueryComponents(uri, version, lastSegmentType, selector, normalizerRewrites));
}
/// <summary>
/// Applies normalization rewrites to the specified
/// <paramref name="expression"/>, recording them in the
/// <paramref name="rewrites"/> dictionary.
/// </summary>
/// <param name="expression">Expression to normalize.</param>
/// <param name="rewrites">Dictionary in which to record rewrites.</param>
/// <returns>The normalized expression.</returns>
internal static Expression Normalize(Expression expression, Dictionary <Expression, Expression> rewrites)
{
Debug.Assert(expression != null, "expression != null");
Debug.Assert(rewrites != null, "rewrites != null");
ExpressionNormalizer normalizer = new ExpressionNormalizer(rewrites);
Expression result = normalizer.Visit(expression);
return(result);
}
internal QueryComponents Translate(Expression e)
{
Uri uri;
Version version;
bool addTrailingParens = false;
Dictionary <Expression, Expression> rewrites = null;
if (!(e is ResourceSetExpression))
{
rewrites = new Dictionary <Expression, Expression>(ReferenceEqualityComparer <Expression> .Instance);
e = Evaluator.PartialEval(e);
e = ExpressionNormalizer.Normalize(e, rewrites);
e = ResourceBinder.Bind(e, this.Context);
addTrailingParens = true;
}
UriWriter.Translate(this.Context, addTrailingParens, e, out uri, out version);
ResourceExpression expression = e as ResourceExpression;
Type lastSegmentType = (expression.Projection == null) ? expression.ResourceType : expression.Projection.Selector.Parameters[0].Type;
return(new QueryComponents(uri, version, lastSegmentType, (expression.Projection == null) ? null : expression.Projection.Selector, rewrites));
}
internal static Expression Normalize(Expression expression, Dictionary <Expression, Expression> rewrites)
{
ExpressionNormalizer normalizer = new ExpressionNormalizer(rewrites);
return(normalizer.Visit(expression));
}
