org.kuali.rice.krms.framework.engine.expression
Class ComparisonOperatorServiceImpl

java.lang.Object
  org.kuali.rice.krms.framework.engine.expression.ComparisonOperatorServiceImpl

All Implemented Interfaces:

ComparisonOperatorService, StringCoercionExtension

public class ComparisonOperatorServiceImpl
extends Object
implements ComparisonOperatorService

ComparisonOperatorService Implementation.

Author:

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

Method Summary

boolean	canCoerce(String type, String value) Can this StringCoercionExtension coerce the given type and value into an Object?
boolean	canCompare(Object lhs, Object rhs) Does the service have an Extension that can compare the given objects?
Object	coerce(String type, String value) Returns an Object of the given type populated with the given value.
int	compare(Object lhs, Object rhs) Returns the int result of a compare between the lhs and rhs objects.
EngineComparatorExtension	findComparatorExtension(Object lhs, Object rhs) Returns the EngineComparatorExtension that can compare the lhs and rhs objects.
StringCoercionExtension	findStringCoercionExtension(String type, String value) Returns the EngineComparatorExtension that can coerce the lhs and rhs objects.
static ComparisonOperatorService	getInstance() Factory method for getting a ComparisonOperatorService
List<EngineComparatorExtension>	getOperators() The List of EngineComparatorExtensions.
List<StringCoercionExtension>	getStringCoercionExtensions()
void	setOperators(List<EngineComparatorExtension> operators) List to use.
void	setStringCoercionExtensions(List<StringCoercionExtension> stringCoercionExtensions) The List of StringCoercionExtensions.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static ComparisonOperatorService getInstance()

Factory method for getting a ComparisonOperatorService

Returns:

a ComparisonOperatorService

getStringCoercionExtensions

public List<StringCoercionExtension> getStringCoercionExtensions()

Specified by:

getStringCoercionExtensions in interface ComparisonOperatorService

Returns:

List

setStringCoercionExtensions

public void setStringCoercionExtensions(List<StringCoercionExtension> stringCoercionExtensions)

Description copied from interface: ComparisonOperatorService

The List of StringCoercionExtensions.

Specified by:

setStringCoercionExtensions in interface ComparisonOperatorService

getOperators

public List<EngineComparatorExtension> getOperators()

Description copied from interface: ComparisonOperatorService

The List of EngineComparatorExtensions.

Specified by:

getOperators in interface ComparisonOperatorService

Returns:

List of configured EngineComparatorExtensions.

setOperators

public void setOperators(List<EngineComparatorExtension> operators)

Description copied from interface: ComparisonOperatorService

List to use.

Specified by:

setOperators in interface ComparisonOperatorService

findComparatorExtension

public EngineComparatorExtension findComparatorExtension(Object lhs,
                                                         Object rhs)

Returns the EngineComparatorExtension that can compare the lhs and rhs objects. If none, then returns the DefaultComparisonOperator

Specified by:

findComparatorExtension in interface ComparisonOperatorService

Parameters:

lhs - left hand side object

rhs - right hand side object

Returns:

an EngineComparatorExtension that can compare the lhs and rhs

compare

public int compare(Object lhs,
                   Object rhs)

Description copied from interface: ComparisonOperatorService

Returns the int result of a compare between the lhs and rhs objects.

Specified by:

compare in interface ComparisonOperatorService

Parameters:

lhs - left hand side object

rhs - right hand side object

Returns:

int result of compare between lhs and rhs objects

canCompare

public boolean canCompare(Object lhs,
                          Object rhs)

Description copied from interface: ComparisonOperatorService

Does the service have an Extension that can compare the given objects?

Specified by:

canCompare in interface ComparisonOperatorService

Parameters:

lhs - left hand side Object

rhs - right hand side Object

Returns:

boolean true a configured EngineComparatorExtension can compare the lhs and rhs Objects.

findStringCoercionExtension

public StringCoercionExtension findStringCoercionExtension(String type,
                                                           String value)

Returns the EngineComparatorExtension that can coerce the lhs and rhs objects. If none, then returns the DefaultComparisonOperator, which also handles default coercion

Specified by:

findStringCoercionExtension in interface ComparisonOperatorService

Parameters:

type - class type to attempt to coerce to

value - value to attempt to coerce the given type with

Returns:

an EngineComparatorExtension that can coerce the type and value

canCoerce

public boolean canCoerce(String type,
                         String value)

Description copied from interface: StringCoercionExtension

Can this StringCoercionExtension coerce the given type and value into an Object?

Specified by:

canCoerce in interface ComparisonOperatorService

Specified by:

canCoerce in interface StringCoercionExtension

Parameters:

type - of Object to coerce to.

value - value to use for coerced type

Returns:

boolean true if this StringCoercionExtension can coerce this type and value

coerce

public Object coerce(String type,
                     String value)

Description copied from interface: StringCoercionExtension

Returns an Object of the given type populated with the given value.

Specified by:

coerce in interface ComparisonOperatorService

Specified by:

coerce in interface StringCoercionExtension

Parameters:

type - to coerce Object to

value - to coerce

Returns:

Object of given type with given value