private QueryOperator UpdateSelect(SelectOperator op, MonadMember src, QueryTree selector)
{
if (src != op.Source || selector != op.Selector)
{
return(MakeSelect(op, src, selector));
}
return(op);
}
/// <summary> /// Creates a <see cref="WhereOperator" /> that represents a where operator. /// </summary> /// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param> /// <param name="source">The monad whose elements to filter.</param> /// <param name="predicate">The function to test each source element for a condition.</param> /// <returns>A <see cref="WhereOperator" /> that has the given source.</returns> public abstract WhereOperator Where(Type elementType, MonadMember source, QueryTree predicate);
/// <summary> /// Creates a <see cref="SelectOperator" /> that represents a select operator. /// </summary> /// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param> /// <param name="inputElementType">The <see cref="Type" /> of the elements in the source monad.</param> /// <param name="source">The monad to invoke a transform function on.</param> /// <param name="selector">A transform function to apply to each source element.</param> /// <returns>A <see cref="SelectOperator" /> that has the given source.</returns> public abstract SelectOperator Select(Type elementType, Type inputElementType, MonadMember source, QueryTree selector);
/// <summary> /// Creates a <see cref="FirstOperator" /> that represents a take operator. /// </summary> /// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param> /// <param name="source">The monad to take elements from.</param> /// <param name="count">The number of elements to return.</param> /// <returns>A <see cref="FirstOperator" /> that has the given source.</returns> public abstract TakeOperator Take(Type elementType, MonadMember source, QueryTree count);
/// <summary> /// Creates a <see cref="FirstOperator" /> that represents a first operator. /// </summary> /// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param> /// <param name="source">The monad from which to get the first element.</param> /// <returns>A <see cref="FirstOperator" /> that has the given source.</returns> public abstract FirstOperator First(Type elementType, MonadMember source);
/// <summary> /// Creates a <see cref="FirstPredicateOperator" /> that represents a first operator with a predicate. /// </summary> /// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param> /// <param name="source">The monad from which to get the first element satisfying a condition.</param> /// <param name="predicate">The function to test each source element for a condition.</param> /// <returns>A <see cref="FirstPredicateOperator" /> that has the given source.</returns> public abstract FirstPredicateOperator First(Type elementType, MonadMember source, QueryTree predicate);
/// <summary>
/// Creates a <see cref="SelectOperator" /> that represents a select operator.
/// </summary>
/// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param>
/// <param name="inputElementType">The <see cref="Type" /> of the elements in the source monad.</param>
/// <param name="source">The monad to invoke a transform function on.</param>
/// <param name="selector">A transform function to apply to each source element.</param>
/// <returns>A <see cref="SelectOperator" /> that has the given source.</returns>
public SelectOperator Select(Type elementType, Type inputElementType, MonadMember source, QueryTree selector)
{
return(new SelectOperator(elementType, inputElementType, source, selector));
}
/// <summary>
/// Creates a <see cref="FirstOperator" /> that represents a take operator.
/// </summary>
/// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param>
/// <param name="source">The monad to take elements from.</param>
/// <param name="count">The number of elements to return.</param>
/// <returns>A <see cref="FirstOperator" /> that has the given source.</returns>
public TakeOperator Take(Type elementType, MonadMember source, QueryTree count)
{
return(new TakeOperator(elementType, source, count));
}
/// <summary>
/// Creates a <see cref="FirstOperator" /> that represents a first operator.
/// </summary>
/// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param>
/// <param name="source">The monad from which to get the first element.</param>
/// <returns>A <see cref="FirstOperator" /> that has the given source.</returns>
public FirstOperator First(Type elementType, MonadMember source)
{
return(new FirstOperator(elementType, source));
}
/// <summary>
/// Creates a <see cref="FirstPredicateOperator" /> that represents a first operator with a predicate.
/// </summary>
/// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param>
/// <param name="source">The monad from which to get the first element satisfying a condition.</param>
/// <param name="predicate">The function to test each source element for a condition.</param>
/// <returns>A <see cref="FirstPredicateOperator" /> that has the given source.</returns>
public FirstPredicateOperator First(Type elementType, MonadMember source, QueryTree predicate)
{
return(new FirstPredicateOperator(elementType, source, predicate));
}
/// <summary>
/// Creates a <see cref="WhereOperator" /> that represents a where operator.
/// </summary>
/// <param name="elementType">The <see cref="Type" /> of the elements in the resulting monad.</param>
/// <param name="source">The monad whose elements to filter.</param>
/// <param name="predicate">The function to test each source element for a condition.</param>
/// <returns>A <see cref="WhereOperator" /> that has the given source.</returns>
public WhereOperator Where(Type elementType, MonadMember source, QueryTree predicate)
{
return(new WhereOperator(elementType, source, predicate));
}
/// <summary>
/// Makes a <see cref="FirstPredicateOperator" /> with the given children.
/// </summary>
/// <param name="node">Original query expression.</param>
/// <param name="source">Source query expression.</param>
/// <param name="elementType">Element type for the resulting operator.</param>
/// <param name="predicate">Predicate query expression.</param>
/// <returns>Representation of the original query expression.</returns>
protected virtual QueryOperator MakeFirstPredicate(FirstPredicateOperator node, Type elementType, MonadMember source, QueryTree predicate)
{
return(node.QueryExpressionFactory.First(elementType, source, predicate));
}
/// <summary>
/// Makes a <see cref="FirstOperator" /> with the given children.
/// </summary>
/// <param name="node">Original query expression.</param>
/// <param name="elementType">Element type for the resulting operator.</param>
/// <param name="source">Source query expression.</param>
/// <returns>Representation of the original query expression.</returns>
protected virtual QueryOperator MakeFirst(FirstOperator node, Type elementType, MonadMember source)
{
return(node.QueryExpressionFactory.First(elementType, source));
}
/// <summary>
/// Makes a <see cref="TakeOperator" /> with the given children.
/// </summary>
/// <param name="node">Original query expression.</param>
/// <param name="source">Source query expression.</param>
/// <param name="elementType">Element type for the resulting operator.</param>
/// <param name="count">Count query expression.</param>
/// <returns>Representation of the original query expression.</returns>
protected virtual QueryOperator MakeTake(TakeOperator node, Type elementType, MonadMember source, QueryTree count)
{
return(node.QueryExpressionFactory.Take(elementType, source, count));
}
/// <summary>
/// Makes a <see cref="SelectOperator" /> with the given children.
/// </summary>
/// <param name="node">Original query expression.</param>
/// <param name="source">Source query expression.</param>
/// <param name="elementType">Element type for the resulting operator.</param>
/// <param name="inputElementType">Input element type for the resulting operator.</param>
/// <param name="selector">Selector query expression.</param>
/// <returns>Representation of the original query expression.</returns>
protected virtual QueryOperator MakeSelect(SelectOperator node, Type elementType, Type inputElementType, MonadMember source, QueryTree selector)
{
return(node.QueryExpressionFactory.Select(elementType, inputElementType, source, selector));
}
