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From Phil Steitz <phil.ste...@gmail.com>
Subject Re: svn commit: r785552 - in /commons/proper/math/trunk/src: java/org/apache/commons/math/complex/Complex.java site/xdoc/changes.xml
Date Fri, 19 Jun 2009 02:56:22 GMT
luc.maisonobe@free.fr wrote:
> ----- "Bill Barker" <billwbarker@verizon.net> a écrit :
>
>   
>> ----- Original Message ----- 
>> From: <luc.maisonobe@free.fr>
>> To: "Commons Developers List" <dev@commons.apache.org>
>> Sent: Wednesday, June 17, 2009 2:58 PM
>> Subject: Re: svn commit: r785552 - in /commons/proper/math/trunk/src:
>>
>> java/org/apache/commons/math/complex/Complex.java
>> site/xdoc/changes.xml
>>
>>
>>
>>     
>>> ----- "Phil Steitz" <phil.steitz@gmail.com> a écrit :
>>>
>>>       
>>>> Sorry if I am being dense here. What serialization problem do the
>>>>         
>> new
>>     
>>>> fields cause, exactly? The class is immutable and they are set by
>>>>         
>> the
>>     
>>>> constructor.
>>>>         
>>> It takes more space to store. If someone uses serialization to store
>>>       
>> or 
>>     
>>> send a bunch of complex >this will vastly increase the load.
>>>       
>> The main problem is that the fields can be either transient or final,
>> but 
>> not both (or rather, you can't reset the value of final fields in 
>> readObject).  I have a slight preference for transient for the reason
>> Luc 
>> gave (a BlockFieldMatrix<ComplexField> will get large quickly), and
>> have no 
>> problem doing the change myself.  But I can wait for other opinions. 
>>     
>
> +1 for that.
> You can reset final fields in readObject, with some java.lang.reflect dirty tricks. Look
at the DeserializeReal{Vector, Matrix} methods in MatrixUtils.
>   
+1

Phil
> Luc
>
>   
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>   


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