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

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

All Implemented Interfaces:

Comparator, EngineComparatorExtension, StringCoercionExtension

public class DefaultComparisonOperator
extends Object
implements EngineComparatorExtension, StringCoercionExtension

The default ComparisonOperator. If no other EngineComparatorExtension have been configured to handle a type, the DefaultComparisonOperator will be used. At the moment the DefaultComparisonOperator is also the default StringCoercionExtension for coercing types.

Author:

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

Constructor Summary

DefaultComparisonOperator()

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)
Object	coerce(String type, String value) Returns an Object of the given type populated with the given value.
int	compare(Object lhs, Object rhs)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

DefaultComparisonOperator

public DefaultComparisonOperator()

Method Detail

compare

public int compare(Object lhs,
                   Object rhs)

Specified by:

compare in interface Comparator

Specified by:

compare in interface EngineComparatorExtension

Returns:

int where 0 is equals - is less than and + is greater than

canCompare

public boolean canCompare(Object lhs,
                          Object rhs)

Specified by:

canCompare in interface EngineComparatorExtension

Returns:

able to compare lhs and rhs

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 StringCoercionExtension

Parameters:

type - to coerce Object to

value - to coerce

Returns:

Object of given type with given 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 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