local.tomas.expr.eval
Class BooleanValue

java.lang.Object
  local.tomas.expr.eval.ExpressionValue
      local.tomas.expr.eval.BooleanValue

public class BooleanValue
extends ExpressionValue

Boolean expression value.

Author:

tomas.teubner

Field Summary

static BooleanValue	FALSE Singleton for false.
static BooleanValue	TRUE Singleton for true.

Fields inherited from class local.tomas.expr.eval.ExpressionValue

NULL

Method Summary

ExpressionValue	evalAnd(ExpressionValue right) Evaluate and.
ExpressionValue	evalCountFunction() Evaluate count function.
ExpressionValue	evalEquality(ExpressionValue right) Evaluate equality comparison.
ExpressionValue	evalInequality(ExpressionValue right) Evaluate inequality comparison.
ExpressionValue	evalNegation() Evaluate negation.
ExpressionValue	evalOrTerm(ExpressionValue right) Evaluate or term.
static BooleanValue	getInstance(boolean value) Get singleton instance with specified value.
Object	getObjectValue() Return the Java object representing this expression value.
ExpressionType	getType() Get the type of this expression value.
boolean	getValue() Get the value.
void	setValue(boolean value) Set the value.
String	toString()

Methods inherited from class local.tomas.expr.eval.ExpressionValue

create, evalAbsFunction, evalAddition, evalAvgFunction, evalConcatenation, evalDivision, evalGreaterEqual, evalGreaterThan, evalInTerm, evalIsNotNull, evalIsNull, evalLengthFunction, evalLessEqual, evalLessThan, evalLike, evalLowerFunction, evalMatch, evalMaxFunction, evalMinFunction, evalMultiplication, evalNotLikeTerm, evalReplaceFunction, evalSignChange, evalSubstrFunction, evalSubtraction, evalSumFunction, evalTrimFunction, evalUpperFunction

Methods inherited from class java.lang.Object

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

Field Detail

FALSE

public static final BooleanValue FALSE

Singleton for false.

TRUE

public static final BooleanValue TRUE

Singleton for true.

Method Detail

getInstance

public static BooleanValue getInstance(boolean value)

Get singleton instance with specified value.

Parameters:

value - the value

Returns:

the instance

getValue

public boolean getValue()

Get the value.

Returns:

Returns the value.

setValue

public void setValue(boolean value)

Set the value.

Parameters:

value - The value to set.

getType

public ExpressionType getType()

Description copied from class: ExpressionValue

Get the type of this expression value.

Specified by:

getType in class ExpressionValue

Returns:

the type

getObjectValue

public Object getObjectValue()

Description copied from class: ExpressionValue

Return the Java object representing this expression value.

Specified by:

getObjectValue in class ExpressionValue

Returns:

the Java object

evalAnd

public ExpressionValue evalAnd(ExpressionValue right)
                        throws ExpressionException

Description copied from class: ExpressionValue

Evaluate and.

Overrides:

evalAnd in class ExpressionValue

Parameters:

right - right operand

Returns:

result

Throws:

ExpressionException

evalCountFunction

public ExpressionValue evalCountFunction()

Description copied from class: ExpressionValue

Evaluate count function.

Overrides:

evalCountFunction in class ExpressionValue

Returns:

constant integer value 1

evalEquality

public ExpressionValue evalEquality(ExpressionValue right)
                             throws ExpressionException

Description copied from class: ExpressionValue

Evaluate equality comparison.

Overrides:

evalEquality in class ExpressionValue

Parameters:

right - right operand

Returns:

result

Throws:

ExpressionException

evalInequality

public ExpressionValue evalInequality(ExpressionValue right)
                               throws ExpressionException

Description copied from class: ExpressionValue

Evaluate inequality comparison.

Overrides:

evalInequality in class ExpressionValue

Parameters:

right - right operand

Returns:

result

Throws:

ExpressionException

evalNegation

public ExpressionValue evalNegation()

Description copied from class: ExpressionValue

Evaluate negation.

Overrides:

evalNegation in class ExpressionValue

Returns:

negated value of this one

evalOrTerm

public ExpressionValue evalOrTerm(ExpressionValue right)
                           throws ExpressionException

Description copied from class: ExpressionValue

Evaluate or term.

Overrides:

evalOrTerm in class ExpressionValue

Parameters:

right - right operand

Returns:

result

Throws:

ExpressionException

toString

public String toString()

Overrides:

toString in class Object