org.josql.expressions

类 BetweenExpression

java.lang.Object

org.josql.expressions.Expression

org.josql.expressions.BinaryExpression

org.josql.expressions.BetweenExpression

public class BetweenExpression
extends BinaryExpression

Represents a "BETWEEN x AND y" expression.

字段概要

从类继承的字段 org.josql.expressions.BinaryExpression

left, right

构造器概要

构造器

构造器和说明
BetweenExpression()

方法概要

限定符和类型	方法和说明
Expression	getEnd() Get the end expression.
Expression	getStart() Get the start expression.
void	init(Query q) Inits the expression.
boolean	isNot()
boolean	isTrue(Object o, Query q) This method allows ANY expression (including those that extend ValueExpression) to be used in the WHERE and HAVING clauses but ensuring that a boolean value is available for every expression.
void	setEnd(ValueExpression e)
void	setNot(boolean v)
void	setStart(ValueExpression s)
String	toString() Return a string representation of the expression, making this abstract forces sub-classes to provide an implementation.

从类继承的方法 org.josql.expressions.BinaryExpression

getExpectedReturnType, getLeft, getRight, getValue, hasFixedResult, setLeft, setRight

从类继承的方法 org.josql.expressions.Expression

isBracketed, setBracketed

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

构造器详细资料

BetweenExpression

public BetweenExpression()

方法详细资料

init

public void init(Query q)
          throws QueryParseException

Inits the expression.

覆盖:

init 在类中 BinaryExpression

参数:

q - The Query object.

抛出:

QueryParseException - If the LHS, start or end cannot be inited.

getStart

public Expression getStart()

Get the start expression.

返回:

The start expression, is an instance of ValueExpression.

getEnd

public Expression getEnd()

Get the end expression.

返回:

The end expression, is an instance of ValueExpression.

setEnd

public void setEnd(ValueExpression e)

setStart

public void setStart(ValueExpression s)

isNot

public boolean isNot()

setNot

public void setNot(boolean v)

isTrue

public boolean isTrue(Object o,
                      Query q)
               throws QueryExecutionException

从类复制的说明: Expression

This method allows ANY expression (including those that extend ValueExpression) to be used in the WHERE and HAVING clauses but ensuring that a boolean value is available for every expression.

指定者:

isTrue 在类中 Expression

参数:

o - The current object to evaluate the expression on.

q - The Query object.

返回:

true if the expression evaluates to true (well duh...).

抛出:

QueryExecutionException - If there is a problem with the execution of the expression.

toString

public String toString()

从类复制的说明: Expression

Return a string representation of the expression, making this abstract forces sub-classes to provide an implementation.

指定者:

toString 在类中 Expression

返回:

A string representation of the expression.