Re: Null pointer exceptions and database null

From: Mike Kienenberger (mkienen..mail.com)
Date: Thu Aug 03 2006 - 17:14:31 EDT

  • Next message: Mike Kienenberger: "Re: Null pointer exceptions and database null"

    For JSF, it updates values even if the values haven't changed. So I
    check for that condition and if so, I don't actually update anything.

    The safety issue is that DataObjects are only equal if it's the same
    object in memory. So assigning another seemingly identical object
    would sneak through.

    I eventually (last week) wrote a new equals() method for my
    BaseDataObject class that makes DataObjects equal if their ObjectId
    value is equal. I'm hoping that will do what I want, but I'm a bit
    nervous about changing DataObject equality.

    On 8/3/06, Øyvind Harboe <oyvind.harbo..ylin.com> wrote:
    > Super!
    >
    > > // TODO: needed for JSF
    > > Object oldValue = readProperty(propName);
    > > if (oldValue == value)
    > > {
    > > // NOOP
    > > return;
    > > }
    > > if (null != oldValue)
    > > {
    > > if (oldValue.equals(value))
    > > {
    > > // NOOP
    > > // IMPLEMENT: not sure if this is safe!
    >
    > What does this comment mean?
    >
    >
    >
    > --
    > Øyvind Harboe
    > http://www.zylin.com
    >

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