[TransWarp] peak.binding questions
ueck at net-labs.de
Wed Jun 4 12:55:36 EDT 2003
while i have done lots of coding with peak during the last weeks
the following problem occured regularly and i don't know
how to "peak"ish solve it:
- I have different Implementations of something (e.g.
platform-dependent) i specify them in my package-ini:
variantA = importString('some.path.to:A')
variantB = importString('some.path.to:B')
- then i have some Component where i want to use *one*
of those variants. i also specify the choice in some
wichVariant = 'variantA'
the user-conf file should be as easy as possible e.g. no
cryptic config.getProperty(propertyMap ........)
initially i thought i could write something like this to create
an instance of some.path.to.A:
myVariantInstance = binding.New( \
PropertyName('some.property.' + \
this obviously does not work as getProperty has ctx as first
parameter and is not known at that time. and New only accepts
strings or types/classes.
within the component i end up with once methods that do the
property lookups and create the instance by hand.
is there an easier way to do this?
same applies when i wanna configure some e.g. LDAPConnection:
i want to specify it in a config-file:
ldapurl = 'ldap://user:auth@server/base'
but i cannot say:
connection = \
if these situations could be solved without writing once-methods
my could would look much better.
thanks for your comments
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