org.josql.expressions
Class 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.

Field Summary

Fields inherited from class org.josql.expressions.BinaryExpression

left, right

Constructor Summary

BetweenExpression()

Method Summary

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) Return whether this expression evaluates to true.
void	setEnd(ValueExpression e)
void	setNot(boolean v)
void	setStart(ValueExpression s)
String	toString() Returns a string version of this expression.

Methods inherited from class org.josql.expressions.BinaryExpression

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

Methods inherited from class org.josql.expressions.Expression

isBracketed, setBracketed

Methods inherited from class java.lang.Object

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

Constructor Detail

BetweenExpression

public BetweenExpression()

Method Detail

init

public void init(Query q)
          throws QueryParseException

Inits the expression.

Overrides:

init in class BinaryExpression

Parameters:

q - The Query object.

Throws:

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

getStart

public Expression getStart()

Get the start expression.

Returns:

The start expression, is an instance of ValueExpression.

getEnd

public Expression getEnd()

Get the end expression.

Returns:

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

Return whether this expression evaluates to true. Is equivalent to: LHS >= START AND LHS <= END. And of course if the expression is NOTed then it returns !(LHS >= START AND LHS <= END).

Specified by:

isTrue in class Expression

Parameters:

o - The object to perform the expression on.

q - The Query object.

Returns:

true if the LHS is between the start and end values.

Throws:

QueryExecutionException - If the expression cannot be executed.

toString

public String toString()

Returns a string version of this expression. Will return the form:

   Expression [ NOT ] BETWEEN Expression AND Expression
 

Specified by:

toString in class Expression

Returns:

A string version of the expression.