Class QueryExpressionFactoryBase

Base class for factories to create query expressions.

Inheritance

System.Object

QueryExpressionFactoryBase

DefaultQueryExpressionFactory

Implements

IQueryExpressionFactory

Namespace: System.Linq.CompilerServices.Optimizers

Assembly: Nuqleon.Linq.CompilerServices.Optimizers.dll

Syntax

public abstract class QueryExpressionFactoryBase : Object, IQueryExpressionFactory

Constructors

QueryExpressionFactoryBase()

Declaration

protected QueryExpressionFactoryBase()

Methods

First(Type, MonadMember)

Creates a FirstOperator that represents a first operator.

Declaration

public abstract FirstOperator First(Type elementType, MonadMember source)

Parameters

Type	Name	Description
System.Type	elementType	The System.Type of the elements in the resulting monad.
MonadMember	source	The monad from which to get the first element.

Returns

Type	Description
FirstOperator	A FirstOperator that has the given source.

First(Type, MonadMember, QueryTree)

Creates a FirstPredicateOperator that represents a first operator with a predicate.

Declaration

public abstract FirstPredicateOperator First(Type elementType, MonadMember source, QueryTree predicate)

Parameters

Type	Name	Description
System.Type	elementType	The System.Type of the elements in the resulting monad.
MonadMember	source	The monad from which to get the first element satisfying a condition.
QueryTree	predicate	The function to test each source element for a condition.

Returns

Type	Description
FirstPredicateOperator	A FirstPredicateOperator that has the given source.

LambdaAbstraction(LambdaExpression)

Creates a LambdaAbstraction that abstracts over unknown query nodes and non-query nodes.

Declaration

public LambdaAbstraction LambdaAbstraction(LambdaExpression body)

Parameters

Type	Name	Description
System.Linq.Expressions.LambdaExpression	body	The System.Linq.Expressions.LambdaExpression which represents the unknown parts of a query with holes for known sub-parts.

Returns

Type	Description
LambdaAbstraction	A LambdaAbstraction with holes and parameters to fill the holes.

LambdaAbstraction(LambdaExpression, IEnumerable<QueryTree>)

Creates a LambdaAbstraction that abstracts over unknown query nodes and non-query nodes.

Declaration

public LambdaAbstraction LambdaAbstraction(LambdaExpression body, IEnumerable<QueryTree> parameters)

Parameters

Type	Name	Description
System.Linq.Expressions.LambdaExpression	body	The System.Linq.Expressions.LambdaExpression which represents the unknown parts of a query with holes for known sub-parts.
System.Collections.Generic.IEnumerable<QueryTree>	parameters	The known sub-parts of a query.

Returns

Type	Description
LambdaAbstraction	A LambdaAbstraction with holes and parameters to fill the holes.

MonadAbstraction(Type, QueryTree)

Creates a MonadAbstraction that abstracts over a monad member such as a source or unknown operator.

Declaration

public MonadAbstraction MonadAbstraction(Type elementType, QueryTree inner)

Parameters

Type	Name	Description
System.Type	elementType	The System.Type of the elements in the resulting monad.
QueryTree	inner	The inner monad to abstract over.

Returns

Type	Description
MonadAbstraction	A MonadAbstraction that has the given monadic type.

RequireNotNull<T>(T, String)

Checks whether the argument is null.

Declaration

protected static void RequireNotNull<T>(T value, string paramName)
    where T : class

Parameters

Type	Name	Description
T	value	The argument to check.
System.String	paramName	The name of the argument.

Type Parameters

Name	Description
T	The type of the argument.

RequireTypesAssignable(Type, Type, String)

Checks whether the right value can be assigned to the left value.

Declaration

protected static void RequireTypesAssignable(Type left, Type right, string paramName)

Parameters

Type	Name	Description
System.Type	left	The value to be assigned to.
System.Type	right	The value to assign from.
System.String	paramName	The name of the argument.

Select(Type, Type, MonadMember, QueryTree)

Creates a SelectOperator that represents a select operator.

Declaration

public abstract SelectOperator Select(Type elementType, Type inputElementType, MonadMember source, QueryTree selector)

Parameters

Type	Name	Description
System.Type	elementType	The System.Type of the elements in the resulting monad.
System.Type	inputElementType	The System.Type of the elements in the source monad.
MonadMember	source	The monad to invoke a transform function on.
QueryTree	selector	A transform function to apply to each source element.

Returns

Type	Description
SelectOperator	A SelectOperator that has the given source.

Take(Type, MonadMember, QueryTree)

Creates a FirstOperator that represents a take operator.

Declaration

public abstract TakeOperator Take(Type elementType, MonadMember source, QueryTree count)

Parameters

Type	Name	Description
System.Type	elementType	The System.Type of the elements in the resulting monad.
MonadMember	source	The monad to take elements from.
QueryTree	count	The number of elements to return.

Returns

Type	Description
TakeOperator	A FirstOperator that has the given source.

Where(Type, MonadMember, QueryTree)

Creates a WhereOperator that represents a where operator.

Declaration

public abstract WhereOperator Where(Type elementType, MonadMember source, QueryTree predicate)

Parameters

Type	Name	Description
System.Type	elementType	The System.Type of the elements in the resulting monad.
MonadMember	source	The monad whose elements to filter.
QueryTree	predicate	The function to test each source element for a condition.

Returns

Type	Description
WhereOperator	A WhereOperator that has the given source.

Implements

IQueryExpressionFactory