Package 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

Modifier and Type	Method	Description
boolean	canCoerce(String type, String value)
boolean	canCompare(Object lhs, Object rhs)
Object	coerce(String type, String value)
int	compare(Object lhs, Object rhs)
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()
List<StringCoercionExtension>	getStringCoercionExtensions()
void	setOperators(List<EngineComparatorExtension> operators)
void	setStringCoercionExtensions(List<StringCoercionExtension> stringCoercionExtensions)

Methods inherited from class java.lang.Object

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

Method Details

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

setStringCoercionExtensions

public void setStringCoercionExtensions(List<StringCoercionExtension> stringCoercionExtensions)

Specified by:

setStringCoercionExtensions in interface ComparisonOperatorService

getOperators

public List<EngineComparatorExtension> getOperators()

Specified by:

getOperators in interface ComparisonOperatorService

setOperators

public void setOperators(List<EngineComparatorExtension> operators)

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)

Specified by:

compare in interface ComparisonOperatorService

canCompare

public boolean canCompare(Object lhs,
 Object rhs)

Specified by:

canCompare in interface ComparisonOperatorService

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)

Specified by:

canCoerce in interface ComparisonOperatorService

Specified by:

canCoerce in interface StringCoercionExtension

coerce

public Object coerce(String type,
 String value)

Specified by:

coerce in interface ComparisonOperatorService

Specified by:

coerce in interface StringCoercionExtension