Avoid exceptions in ReflectionUtils.isObjectMethod(…)

[odrotbohm]

Currently, ReflectionUtils.isObjectMethod(…) calls Object.class.getDeclaredMethod(…), which, for every method that is not an object method, will cause an exception being thrown. I.e. if you call that method heavily with non-Object methods, you create a lot of exceptions.

I suggest to replace that method lookup by a Map lookup of all Object methods by name (with their parameter type arrays as value for subsequent comparison on a hit of the first lookup).

[jhoeller]

Replaced with a direct check for Object as declaring class and delegation to the existing isEqualsMethod/isHashCodeMethod/isToStringMethod checks (which are the only overridable ones).