C# 클래스 Azavea.Open.DAO.Criteria.Joins.DaoJoinCriteria

This class defines how to join two FastDAOs together.

공개 프로퍼티들

프로퍼티	타입	설명
BoolType	BooleanOperator
Expressions	List
LeftCriteria	DaoCriteria
Limit	int
Orders	List
RightCriteria	DaoCriteria
Start	int
TypeOfJoin	JoinType

보호된 프로퍼티들

프로퍼티	타입	설명
_log	log4net.ILog

공개 메소드들

메소드	설명
Clear ( ) : void	Completely clears the object so that it may be used over again.
DaoJoinCriteria ( ) : System	Constructs a blank inner join criteria, which will return all records unless you customize it. All expressions added to it will be ANDed together.
DaoJoinCriteria ( BooleanOperator howToAddExpressions ) : System	Constructs a blank inner join criteria, which will return all records unless you customize it.
DaoJoinCriteria ( IJoinExpression firstExpr ) : System	Constructs an inner join criteria with one expression. May be handy for cases where you only need one expression.
DaoJoinCriteria ( IJoinExpression firstExpr, BooleanOperator howToAddExpressions ) : System	Constructs an inner join criteria with one expression.
DaoJoinCriteria ( JoinType typeOfJoin ) : System	Constructs a blank criteria, which will return all records unless you customize it. All expressions added to it will be ANDed together.
DaoJoinCriteria ( JoinType typeOfJoin, BooleanOperator howToAddExpressions ) : System	Constructs a blank criteria, which will return all records unless you customize it.
DaoJoinCriteria ( JoinType typeOfJoin, IJoinExpression firstExpr ) : System	Constructs a criteria with one expression. May be handy for cases where you only need one expression.
DaoJoinCriteria ( JoinType typeOfJoin, IJoinExpression firstExpr, BooleanOperator howToAddExpressions ) : System	Constructs a criteria with one expression.
Flip ( ) : DaoJoinCriteria	For some implementations, it's simpler to only implement one-sided joins. So to handle right (or left) joins, you want to flip the criteria so the right and left daos are swapped and you can do a left (or right) join instead.
ToString ( ) : string	Returns a T:System.String that represents the current T:System.Object.

메소드 상세

Clear() 공개 메소드

Completely clears the object so that it may be used over again.

public Clear ( ) : void
리턴	void

DaoJoinCriteria() 공개 메소드

Constructs a blank inner join criteria, which will return all records unless you customize it. All expressions added to it will be ANDed together.

public DaoJoinCriteria ( ) : System
리턴	System

DaoJoinCriteria() 공개 메소드

Constructs a blank inner join criteria, which will return all records unless you customize it.

public DaoJoinCriteria ( BooleanOperator howToAddExpressions ) : System
howToAddExpressions	BooleanOperator	How expressions will be added together. Determines /// if we do exp1 AND exp2 AND exp3, or if we do /// exp1 OR exp2 OR exp3.
리턴	System

DaoJoinCriteria() 공개 메소드

Constructs an inner join criteria with one expression. May be handy for cases where you only need one expression.

public DaoJoinCriteria ( IJoinExpression firstExpr ) : System
firstExpr	IJoinExpression	The first expression to add.
리턴	System

DaoJoinCriteria() 공개 메소드

Constructs an inner join criteria with one expression.

public DaoJoinCriteria ( IJoinExpression firstExpr, BooleanOperator howToAddExpressions ) : System
firstExpr	IJoinExpression	The first expression to add.
howToAddExpressions	BooleanOperator	How expressions will be added together. Determines /// if we do exp1 AND exp2 AND exp3, or if we do /// exp1 OR exp2 OR exp3.
리턴	System

DaoJoinCriteria() 공개 메소드

Constructs a blank criteria, which will return all records unless you customize it. All expressions added to it will be ANDed together.

public DaoJoinCriteria ( JoinType typeOfJoin ) : System
typeOfJoin	JoinType	Is this an inner join, left join, etc.
리턴	System

DaoJoinCriteria() 공개 메소드

Constructs a blank criteria, which will return all records unless you customize it.

public DaoJoinCriteria ( JoinType typeOfJoin, BooleanOperator howToAddExpressions ) : System
typeOfJoin	JoinType	Is this an inner join, left join, etc.
howToAddExpressions	BooleanOperator	How expressions will be added together. Determines /// if we do exp1 AND exp2 AND exp3, or if we do /// exp1 OR exp2 OR exp3.
리턴	System

DaoJoinCriteria() 공개 메소드

Constructs a criteria with one expression. May be handy for cases where you only need one expression.

public DaoJoinCriteria ( JoinType typeOfJoin, IJoinExpression firstExpr ) : System
typeOfJoin	JoinType	Is this an inner join, left join, etc.
firstExpr	IJoinExpression	The first expression to add.
리턴	System

DaoJoinCriteria() 공개 메소드

Constructs a criteria with one expression.

public DaoJoinCriteria ( JoinType typeOfJoin, IJoinExpression firstExpr, BooleanOperator howToAddExpressions ) : System
typeOfJoin	JoinType	Is this an inner join, left join, etc.
firstExpr	IJoinExpression	The first expression to add.
howToAddExpressions	BooleanOperator	How expressions will be added together. Determines /// if we do exp1 AND exp2 AND exp3, or if we do /// exp1 OR exp2 OR exp3.
리턴	System

Flip() 공개 메소드

For some implementations, it's simpler to only implement one-sided joins. So to handle right (or left) joins, you want to flip the criteria so the right and left daos are swapped and you can do a left (or right) join instead.

public Flip ( ) : DaoJoinCriteria
리턴	DaoJoinCriteria

ToString() 공개 메소드

Returns a T:System.String that represents the current T:System.Object.

public ToString ( ) : string
리턴	string

프로퍼티 상세

BoolType 공개적으로 프로퍼티

Whether this is an "AND" criteria or an "OR" criteria.

public BooleanOperator BoolType
리턴	BooleanOperator

Expressions 공개적으로 프로퍼티

The individual expressions that make up this criteria, defaults to empty.

public List Expressions
리턴	List

LeftCriteria 공개적으로 프로퍼티

These are the criteria applied to the left DAO's records by themselves. I.E. only return rows where left.field == 5.

public DaoCriteria LeftCriteria
리턴	DaoCriteria

Limit 공개적으로 프로퍼티

Used to limit the data returned, only data rows Start to Start + Limit will be returned. A value of -1 means ignore this parameter.

public int Limit
리턴	int

Orders 공개적으로 프로퍼티

The list of properties to sort on, defaults to empty.

public List Orders
리턴	List

RightCriteria 공개적으로 프로퍼티

These are the criteria applied to the right DAO's records by themselves. I.E. only return rows where right.field is not null.

public DaoCriteria RightCriteria
리턴	DaoCriteria

Start 공개적으로 프로퍼티

Used to limit the data returned, only data rows Start to Start + Limit will be returned. A value of -1 means ignore this parameter.

public int Start
리턴	int

TypeOfJoin 공개적으로 프로퍼티

Whether this is an inner join, left join, etc.

public JoinType TypeOfJoin
리턴	JoinType

_log 보호되어 있는 정적으로 프로퍼티

log4net logger for logging any appropriate messages.

protected static ILog,log4net _log
리턴	log4net.ILog