Package org.kuali.rice.krms.framework.engine.expression

Enum Class ComparisonOperator

java.lang.Object

java.lang.Enum<ComparisonOperator>

org.kuali.rice.krms.framework.engine.expression.ComparisonOperator

All Implemented Interfaces:

Serializable, Comparable<ComparisonOperator>, Constable, org.kuali.rice.core.api.mo.common.Coded

public enum ComparisonOperator
extends Enum<ComparisonOperator>
implements org.kuali.rice.core.api.mo.common.Coded

Operators enumeration for comparing objects. EQUALS NOT_EQUALS GREATER_THAN GREATER_THAN_EQUAL LESS_THAN LESS_THAN_EQUAL. Uses registered EngineComparatorExtension for the given objects or the DefaultComparisonOperator.

Author:

Kuali Rice Team (rice.collab@kuali.org)

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
DOES_NOT_EXIST	use this flag with the static factory to get a ComparisonOperator DOES_NOT_EXISTS
EQUALS	use this flag with the static factory to get a ComparisonOperator EQUALS
EXISTS	use this flag with the static factory to get a ComparisonOperator EXISTS
GREATER_THAN	use this flag with the static factory to get a ComparisonOperator GREATER_THAN
GREATER_THAN_EQUAL	use this flag with the static factory to get a ComparisonOperator GREATER_THAN_EQUAL
LESS_THAN	use this flag with the static factory to get a ComparisonOperator LESS_THAN
LESS_THAN_EQUAL	use this flag with the static factory to get a ComparisonOperator LESS_THAN_EQUAL
NOT_EQUALS	use this flag with the static factory to get a ComparisonOperator NOT_EQUALS

Field Summary

Fields

Modifier and Type	Field	Description
static final Collection<String>	OPERATOR_CODES	Operator codes, unmodifiable Collection
static final Collection<String>	OPERATOR_NAMES	Operator names, unmodifiable Collection

Method Summary

Modifier and Type	Method	Description
boolean	compare(Object lhs, Object rhs)	Compare the given objects
static ComparisonOperator	fromCode(String code)	Create a ComparisonOperator from the given code
String	getCode()
void	setComparisonOperatorService(ComparisonOperatorService comparisonOperatorService)
String	toString()
static ComparisonOperator	valueOf(String name)	Returns the enum constant of this class with the specified name.
static ComparisonOperator[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

EQUALS

public static final ComparisonOperator EQUALS

use this flag with the static factory to get a ComparisonOperator EQUALS

NOT_EQUALS

public static final ComparisonOperator NOT_EQUALS

use this flag with the static factory to get a ComparisonOperator NOT_EQUALS

GREATER_THAN

public static final ComparisonOperator GREATER_THAN

use this flag with the static factory to get a ComparisonOperator GREATER_THAN

GREATER_THAN_EQUAL

public static final ComparisonOperator GREATER_THAN_EQUAL

use this flag with the static factory to get a ComparisonOperator GREATER_THAN_EQUAL

LESS_THAN

public static final ComparisonOperator LESS_THAN

use this flag with the static factory to get a ComparisonOperator LESS_THAN

LESS_THAN_EQUAL

public static final ComparisonOperator LESS_THAN_EQUAL

use this flag with the static factory to get a ComparisonOperator LESS_THAN_EQUAL

EXISTS

public static final ComparisonOperator EXISTS

use this flag with the static factory to get a ComparisonOperator EXISTS

DOES_NOT_EXIST

public static final ComparisonOperator DOES_NOT_EXIST

use this flag with the static factory to get a ComparisonOperator DOES_NOT_EXISTS

Field Details

OPERATOR_CODES

public static final Collection<String> OPERATOR_CODES

Operator codes, unmodifiable Collection

OPERATOR_NAMES

public static final Collection<String> OPERATOR_NAMES

Operator names, unmodifiable Collection

Method Details

values

public static ComparisonOperator[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static ComparisonOperator valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

getCode

public String getCode()

Specified by:

getCode in interface org.kuali.rice.core.api.mo.common.Coded

Returns:

code representing the type of operator

fromCode

public static ComparisonOperator fromCode(String code)

Create a ComparisonOperator from the given code

Parameters:

code - for type of ComparisonOperator to create

Returns:

a ComparisonOperator created with the given code.

Throws:

IllegalArgumentException - if the given code does not exist

compare

public boolean compare(Object lhs,
 Object rhs)

Compare the given objects

Parameters:

lhs - left hand side object

rhs - right hand side object

Returns:

boolean value of comparison results based on the type of operator.

setComparisonOperatorService

public void setComparisonOperatorService(ComparisonOperatorService comparisonOperatorService)

toString

public String toString()

Overrides:

toString in class Enum<ComparisonOperator>

Returns:

type code