I've just bought a couple of "iButton Thermochrons" (logging
thermometers), and I'd like to access them through their Java interface
from R. But I've never really used Java, so I'm running into a problem,
and I hope there's a very simple solution.
I've managed to use rJava to create an object with
> provider <- .jnew("com/dalsemi/onewire/OneWireAccessProvider")
> .jcall(provider,"Ljava/lang/Class;", "getClass")
[1] "Java-Object{class com.dalsemi.onewire.OneWireAccessProvider}"
and can see that it has a "getDefaultAdapter" method:
> .jmethods(provider,"getDefaultAdapter")
[1] "public static com.dalsemi.onewire.adapter.DSPortAdapter
com.dalsemi.onewire.OneWireAccessProvider.getDefaultAdapter() throws
com.dalsemi.onewire.adapter.OneWireIOException,com.dalsemi.onewire.OneWireException"
but when I call that, I get an error:
> adapter <- .jcall(provider,
"Lcom/dalsemi/onewire/adapter/DSPortAdapter;", "getDefaultAdapter")
Error in .jcall(provider, "Lcom/dalsemi/onewire/adapter/DSPortAdapter;", :
RcallMethod: method not found
Is it obvious what I am doing wrong?
Duncan Murdoch
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