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

java.lang.Object
  java.lang.Enum<ComparisonOperator>
      org.kuali.rice.krms.framework.engine.expression.ComparisonOperator

All Implemented Interfaces:

Serializable, Comparable<ComparisonOperator>, Coded

public enum ComparisonOperator
extends Enum<ComparisonOperator>
implements 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)

Enum Constant Summary

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

static Collection<String>	OPERATOR_CODES Operator codes, unmodifiable Collection
static Collection<String>	OPERATOR_NAMES Operator names, unmodifiable Collection

Method Summary

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

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

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 Detail

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 Detail

values

public static ComparisonOperator[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ComparisonOperator c : ComparisonOperator.values())
    System.out.println(c);

Returns:

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

valueOf

public static ComparisonOperator valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified name

NullPointerException - if the argument is null

getCode

public String getCode()

Description copied from interface: Coded

The code value for this object. In general a code value cannot be null or a blank string.

Specified by:

getCode in interface 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