org.josql.expressions

类 EqualsExpression

java.lang.Object

org.josql.expressions.Expression

org.josql.expressions.BinaryExpression

org.josql.expressions.EqualsExpression

public class EqualsExpression
extends BinaryExpression

This class represents an "=" or "!=" expression. This class also provides the ability for the developer to prefix the "=" or "!=" with "$" to indicate that a case-insensitive comparison should be made, in which case the LHS and RHS are converted to strings first.

字段概要

字段

限定符和类型	字段和说明
boolean	ignoreCase

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
EqualsExpression()

方法概要

限定符和类型	方法和说明
boolean	isIgnoreCase()
boolean	isNot()
boolean	isTrue(Object o, Query q) Return whether this expression evaluates to true.
void	setIgnoreCase(boolean v)
void	setNot(boolean v)
String	toString() Return a string version of the expression.

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

getExpectedReturnType, getLeft, getRight, getValue, hasFixedResult, init, 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

字段详细资料

ignoreCase

public boolean ignoreCase

构造器详细资料

EqualsExpression

public EqualsExpression()

方法详细资料

setIgnoreCase

public void setIgnoreCase(boolean v)

isIgnoreCase

public boolean isIgnoreCase()

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.

指定者:

isTrue 在类中 Expression

参数:

o - The current object to perform the expression on.

q - The Query object.

返回:

true if the expression evaluates to true, false otherwise.

抛出:

QueryExecutionException - If the expression cannot be evaluated.

toString

public String toString()

Return a string version of the expression. In the form: Expression [ $ ] [ ! ] = Expression

指定者:

toString 在类中 Expression

返回:

The string version.