org.josql.expressions
Class 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.

Field Summary

boolean

ignoreCase

Fields inherited from class org.josql.expressions.BinaryExpression

left, right

Constructor Summary

EqualsExpression()

Method Summary

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.

Methods inherited from class org.josql.expressions.BinaryExpression

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

Field Detail

ignoreCase

public boolean ignoreCase

Constructor Detail

EqualsExpression

public EqualsExpression()

Method Detail

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.

Specified by:

isTrue in class Expression

Parameters:

o - The current object to perform the expression on.

q - The Query object.

Returns:

true if the expression evaluates to true, false otherwise.

Throws:

QueryExecutionException - If the expression cannot be evaluated.

toString

public String toString()

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

Specified by:

toString in class Expression

Returns:

The string version.