org.springframework.expression

接口 TypeComparator

所有已知实现类:

StandardTypeComparator

public interface TypeComparator

Instances of a type comparator should be able to compare pairs of objects for equality. The specification of the return value is the same as for Comparable.

从以下版本开始:

3.0

作者:

Andy Clement

另请参阅:

Comparable

方法概要

限定符和类型	方法和说明
boolean	canCompare(Object firstObject, Object secondObject) Return true if the comparator can compare these two objects.
int	compare(Object firstObject, Object secondObject) Compare two given objects.

方法详细资料

canCompare

boolean canCompare(@Nullable
                   Object firstObject,
                   @Nullable
                   Object secondObject)

Return true if the comparator can compare these two objects.

参数:

firstObject - the first object

secondObject - the second object

返回:

true if the comparator can compare these objects

compare

int compare(@Nullable
            Object firstObject,
            @Nullable
            Object secondObject)
     throws EvaluationException

Compare two given objects.

参数:

firstObject - the first object

secondObject - the second object

返回:

0 if they are equal, <0 if the first is smaller than the second, or >0 if the first is larger than the second

抛出:

EvaluationException - if a problem occurs during comparison (or if they are not comparable in the first place)