org.springframework.binding.value.support
Class EqualsValueChangeDetector

java.lang.Object
  org.springframework.binding.value.support.EqualsValueChangeDetector

All Implemented Interfaces:

ValueChangeDetector

public class EqualsValueChangeDetector
extends Object
implements ValueChangeDetector

An implementation of ValueChangeDetector that provides the same semantics as ObjectUtils.nullSafeEquals(java.lang.Object, java.lang.Object). If the objects are not the same object, they are compared using the equals method of the first object. Nulls are handled safely.

Author:

Larry Streepy

Constructor Summary

EqualsValueChangeDetector()

Method Summary

boolean

hasValueChanged(Object oldValue, Object newValue) Determines if there has been a change in value between the provided arguments.

Methods inherited from class java.lang.Object

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

Constructor Detail

EqualsValueChangeDetector

public EqualsValueChangeDetector()

Method Detail

hasValueChanged

public boolean hasValueChanged(Object oldValue,
                               Object newValue)

Determines if there has been a change in value between the provided arguments. The objects are compared using the equals method.

Specified by:

hasValueChanged in interface ValueChangeDetector

Parameters:

oldValue - Original object value

newValue - New object value

Returns:

true if the objects are different enough to indicate a change in the value model