/// <summary>
/// Generates System.CodeDom.CodeExpression from the given expression.
/// </summary>
/// <param name="expression">Expression from which System.CodeDom.CodeExpression is generated.</param>
/// <returns>Generated System.CodeDom.CodeExpression.</returns>
public virtual CodeExpression Visit(QueryAsExpression expression)
{
CodeExpression argument = this.GenerateCode(expression.Source);
CodeTypeReference typeRef = this.GetTypeReference(expression.TypeToOperateAgainst);
return(argument.TypeAs(typeRef));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryAsExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public override string Visit(QueryAsExpression expression)
{
var queryEntityType = expression.TypeToOperateAgainst as QueryEntityType;
ExceptionUtilities.CheckObjectNotNull(queryEntityType, "Expected a QueryEntityType any other type is not supported");
return(string.Format(CultureInfo.InvariantCulture, "{0}/{1}", this.ComputeUriInternal(expression.Source), queryEntityType.EntityType.FullName));
}
/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public QueryValue Visit(QueryAsExpression expression)
{
QueryValue source = this.Evaluate(expression.Source);
QueryType resultType = expression.TypeToOperateAgainst;
return(source.TreatAs(resultType));
}
/// <summary>
/// Replaces the given expression.
/// </summary>
/// <param name="expression">Expression to replace.</param>
/// <returns>Replaced expression.</returns>
public virtual QueryExpression Visit(QueryAsExpression expression)
{
var source = this.ReplaceExpression(expression.Source);
if (this.HasChanged(expression.Source, source))
{
return(CommonQueryBuilder.As(source, expression.TypeToOperateAgainst));
}
return(expression);
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryAsExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>
/// Uri query string representing the expression.
/// </returns>
public override string Visit(QueryAsExpression expression)
{
var source = this.Convert(expression.Source);
var typeName = this.GetEdmTypeName(expression.TypeToOperateAgainst);
if (string.IsNullOrEmpty(source))
{
return(string.Format(CultureInfo.InvariantCulture, "{0}", typeName));
}
else
{
return(string.Format(CultureInfo.InvariantCulture, "{0}/{1}", source, typeName));
}
}
/// <summary>
/// Returns the expand string that represents the expression.
/// </summary>
/// <param name="lambdaExpression">The lambda expression to convert to an expand string.</param>
/// <returns>String representation of the lambda expression.</returns>
private static string ToExpandString(this QueryExpression lambdaExpression)
{
ExceptionUtilities.CheckArgumentNotNull(lambdaExpression, "lambdaExpression");
QueryPropertyExpression queryPropertyExpression = lambdaExpression as QueryPropertyExpression;
ExceptionUtilities.CheckArgumentNotNull(queryPropertyExpression, "queryExpression as QueryPropertyExpression");
QueryAsExpression queryAsExpression = queryPropertyExpression.Instance as QueryAsExpression;
if (queryAsExpression != null)
{
QueryEntityType queryEntityType = queryAsExpression.TypeToOperateAgainst as QueryEntityType;
ExceptionUtilities.CheckObjectNotNull(queryEntityType, "The type to operate against for the query As expression is not a QueryEntityType");
return(queryEntityType.EntityType.FullName + "/" + queryPropertyExpression.Name);
}
else
{
return(queryPropertyExpression.Name);
}
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryAsExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>
/// Uri query string representing the expression.
/// </returns>
public override string Visit(QueryAsExpression expression)
{
var source = this.Convert(expression.Source);
var typeName = this.GetEdmTypeName(expression.TypeToOperateAgainst);
if (string.IsNullOrEmpty(source))
{
return string.Format(CultureInfo.InvariantCulture, "{0}", typeName);
}
else
{
return string.Format(CultureInfo.InvariantCulture, "{0}/{1}", source, typeName);
}
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryAsExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public override string Visit(QueryAsExpression expression)
{
var queryEntityType = expression.TypeToOperateAgainst as QueryEntityType;
ExceptionUtilities.CheckObjectNotNull(queryEntityType, "Expected a QueryEntityType any other type is not supported");
return string.Format(CultureInfo.InvariantCulture, "{0}/{1}", this.ComputeUriInternal(expression.Source), queryEntityType.EntityType.FullName);
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryAsExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public virtual string Visit(QueryAsExpression expression)
{
throw new TaupoNotSupportedException("Not supported");
}
/// <summary>
/// Resolves types for the specified expression.
/// </summary>
/// <param name="expression">The expression to resolve types for.</param>
/// <returns>Expression with resolved types.</returns>
public QueryExpression Visit(QueryAsExpression expression)
{
var source = this.ResolveTypes(expression.Source);
return(source.As(expression.TypeToOperateAgainst));
}
