C# Class IQ.Data.QueryMapping

Defines mapping information & rules for the query provider

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Public Methods

Method	Description
GetAggregator ( Type expectedType, Type actualType ) : LambdaExpression	Get a function that coerces an a sequence of one type into another type. This is primarily used for aggregators stored in ProjectionExpression's, which are used to represent the final transformation of the entire result set of a query.
GetAssociationKeys ( MemberInfo association, List &declaredTypeMembers, List &associatedMembers ) : void	Get the members for the key properities to be joined in an association relationship
GetColumnName ( MemberInfo member ) : string	The name of the corresponding table column
GetMappedMembers ( Type rowType ) : IEnumerable	A sequence of all the mapped members
GetMemberExpression ( Expression root, MemberInfo member ) : Expression	Get an expression for a mapped property relative to a root expression. The root is either a TableExpression or an expression defining an entity instance.
GetRelatedType ( MemberInfo member ) : Type	The type of the entity on the other side of the relationship
GetTableName ( Type rowType ) : string	The name of the corresponding database table
GetTableQuery ( Type rowType ) : ProjectionExpression	Get a query expression that selects all entities from a table
GetTypeProjection ( Expression root, Type type ) : Expression	Gets an expression that constructs an entity instance relative to a root. The root is most often a TableExpression, but may be any other experssion such as a ConstantExpression.
IsColumn ( MemberInfo member ) : bool	Determines if a property is mapped onto a column
IsEntity ( Type type ) : bool	Determines if a give CLR type is mapped as a database entity
IsIdentity ( MemberInfo member ) : bool	Determines if a property represents or is part of the entities unique identity (often primary key)
IsMapped ( MemberInfo member ) : bool	Deterimines is a property is mapped onto a column or relationship
IsRelationship ( MemberInfo member ) : bool	Determines if a property is mapped as a relationship
IsSingletonRelationship ( MemberInfo member ) : bool	Determines if a relationship property refers to a single optional entity (as opposed to a collection.)
Translate ( Expression expression ) : Expression	Apply mapping translations to this expression

Protected Methods

Method	Description
QueryMapping ( QueryLanguage language ) : System

Private Methods

Method	Description
CoerceElement ( Type expectedElementType, Expression expression ) : Expression

Method Details

GetAggregator() public method

Get a function that coerces an a sequence of one type into another type. This is primarily used for aggregators stored in ProjectionExpression's, which are used to represent the final transformation of the entire result set of a query.

public GetAggregator ( Type expectedType, Type actualType ) : LambdaExpression
expectedType	System.Type
actualType	System.Type
return	System.Linq.Expressions.LambdaExpression

GetAssociationKeys() public abstract method

Get the members for the key properities to be joined in an association relationship

public abstract GetAssociationKeys ( MemberInfo association, List &declaredTypeMembers, List &associatedMembers ) : void
association	System.Reflection.MemberInfo
declaredTypeMembers	List
associatedMembers	List
return	void

GetColumnName() public abstract method

The name of the corresponding table column

public abstract GetColumnName ( MemberInfo member ) : string
member	System.Reflection.MemberInfo
return	string

GetMappedMembers() public method

A sequence of all the mapped members

public GetMappedMembers ( Type rowType ) : IEnumerable
rowType	System.Type
return	IEnumerable

GetMemberExpression() public method

Get an expression for a mapped property relative to a root expression. The root is either a TableExpression or an expression defining an entity instance.

public GetMemberExpression ( Expression root, MemberInfo member ) : Expression
root	System.Linq.Expressions.Expression
member	System.Reflection.MemberInfo
return	System.Linq.Expressions.Expression

GetRelatedType() public abstract method

The type of the entity on the other side of the relationship

public abstract GetRelatedType ( MemberInfo member ) : Type
member	System.Reflection.MemberInfo
return	System.Type

GetTableName() public abstract method

The name of the corresponding database table

public abstract GetTableName ( Type rowType ) : string
rowType	System.Type
return	string

GetTableQuery() public method

Get a query expression that selects all entities from a table

public GetTableQuery ( Type rowType ) : ProjectionExpression
rowType	System.Type
return	ProjectionExpression

GetTypeProjection() public method

Gets an expression that constructs an entity instance relative to a root. The root is most often a TableExpression, but may be any other experssion such as a ConstantExpression.

public GetTypeProjection ( Expression root, Type type ) : Expression
root	System.Linq.Expressions.Expression
type	System.Type
return	System.Linq.Expressions.Expression

IsColumn() public abstract method

Determines if a property is mapped onto a column

public abstract IsColumn ( MemberInfo member ) : bool
member	System.Reflection.MemberInfo
return	bool

IsEntity() public abstract method

Determines if a give CLR type is mapped as a database entity

public abstract IsEntity ( Type type ) : bool
type	System.Type
return	bool

IsIdentity() public abstract method

Determines if a property represents or is part of the entities unique identity (often primary key)

public abstract IsIdentity ( MemberInfo member ) : bool
member	System.Reflection.MemberInfo
return	bool

IsMapped() public abstract method

Deterimines is a property is mapped onto a column or relationship

public abstract IsMapped ( MemberInfo member ) : bool
member	System.Reflection.MemberInfo
return	bool

IsRelationship() public abstract method

Determines if a property is mapped as a relationship

public abstract IsRelationship ( MemberInfo member ) : bool
member	System.Reflection.MemberInfo
return	bool

IsSingletonRelationship() public method

Determines if a relationship property refers to a single optional entity (as opposed to a collection.)

public IsSingletonRelationship ( MemberInfo member ) : bool
member	System.Reflection.MemberInfo
return	bool

QueryMapping() protected method

protected QueryMapping ( QueryLanguage language ) : System
language	QueryLanguage
return	System

Translate() public method

Apply mapping translations to this expression

public Translate ( Expression expression ) : Expression
expression	System.Linq.Expressions.Expression
return	System.Linq.Expressions.Expression