Hello,
I'm trying to package some source files that link R to a broker using
a Java API and the rJava package. I am successful doing the connection
and operate on it using my R code. I would like to package the files and
release the package.
I created some S4 classes to hold several Java objects. I use WinXP and R
2.7.1. I've searched RSeek and the Wiki for help, but could not find a
solution.
Here is my class definition:
twsConnect <- function(...)
new("twsConnect", ...)
setClass(
Class="twsConnect",
representation=representation(
clientId = "integer",
host = "character",
port = "integer",
reference = "jobjRef"),
prototype=prototype(
clientId = as.integer(0),
host = "",
port = as.integer(7496),
reference = .jnull())
)
setMethod("initialize", "twsConnect", function(
.Object, clientId = 0, host = "", port = 7496, ...)
{
# hook up to the TWS
ref <- .jnew("dev/AAD_Trader", as.integer(clientId), host,
as.integer(port))
if (class(ref)[1] != "jobjRef")
stop("Could not connect. Check your settings.")
[EMAIL PROTECTED] <- as.integer(clientId)
[EMAIL PROTECTED] <- as.character(host)
[EMAIL PROTECTED] <- as.integer(port)
[EMAIL PROTECTED] <- ref
.Object
}
)
setMethod("show", "twsConnect",
function(object){
cat("Object of class \"", class(object), "\":\n", sep="")
lines <- NULL
for (s in slotNames(object)){
cont <- slot(object, s)
if (is.character(cont))cont <- paste('"', cont, '"', sep="")
if (class(cont)=="jobjRef") cont <- "jobjRef"
lines <- paste(lines, paste(s, " = ", cont, "\n",
sep=""), sep="")
}
cat(lines)
}
)
I have other files too. Here is the output from package creation:
S:\All\Risk\Software\R\R-2.7.1\bin>Rcmd build --force --binary
H:/user/R/Adrian/RIB/
* checking for file 'H:/user/R/Adrian/RIB/DESCRIPTION' ... OK
* preparing 'H:/user/R/Adrian/RIB':
* checking DESCRIPTION meta-information ... OK
* removing junk files
* excluding invalid files from 'RIB'
Subdirectory 'R' contains invalid file names:
.make.IB.package.R .utilities.R
* checking for LF line-endings in source and make files
* checking for empty or unneeded directories
WARNING: directory 'RIB/inst/doc' is empty
* building binary distribution
WARNING: some HTML links may not be found
installing R.css in C:/DOCUME~1/e47187/LOCALS~1/Temp/Rinst238480883
Using auto-selected zip options ''
---------- Making package RIB ------------
adding build stamp to DESCRIPTION
installing NAMESPACE file and metadata
installing R files
installing inst files
preparing package RIB for lazy loading
Loading required package: rJava
Warning: package 'rJava' was built under R version 2.7.2
Loading required package: zoo
Attaching package: 'zoo'
The following object(s) are masked from package:base :
as.Date.numeric
Creating a new generic function for "summary" in "RIB"
installing man source files
installing indices
installing help
>>> Building/Updating help pages for package 'RIB'
Formats: text html latex example chm
IBrokers-package text html latex example chm
reqAccountUpdates text html latex example chm
reqHistoricalData text html latex example chm
twsConnect text html latex example chm
Note: removing empty section \details
Note: removing empty section \details
twsContract text html latex example chm
twsOrder text html latex example chm
hhc: not found
CHM compile failed: HTML Help Workshop not installed?
adding MD5 sums
packaged installation of package 'RIB' as RIB_0.1.0.zip
* DONE (RIB)
Not clean yet, but good for testing.
So, from R:
> require("RIB")
Loading required package: RIB
Loading required package: rJava
Loading required package: zoo
Attaching package: 'zoo'
The following object(s) are masked from package:base :
as.Date.numeric
Warning message:
package 'rJava' was built under R version 2.7.2
> tws <- twsConnect()
> tws
Object of class "twsConnect":
clientId = 0
host = ""
port = 7496
reference = jobjRef
> [EMAIL PROTECTED]
[1] "Java-Object<null>"
So I have no connection...
> tws <- new("twsConnect", 1, "", 7496)
Error in initialize(value, ...) :
cannot use object of class "numeric" in new(): class "twsConnect" does
not extend that class
>
but if I source the file:
> source("H:/user/R/Adrian/RIB/R/twsConnect.R")
> tws <- twsConnect()
> tws
Object of class "twsConnect":
clientId = 0
host = ""
port = 7496
reference = jobjRef
>
> [EMAIL PROTECTED]
[1] "[EMAIL PROTECTED]"
>
Things work as I want, I have the connection. What does source do, that I
miss when packaging?
My NAMESPACE file is:
exportPattern("^[^\\.]")
exportClasses("twsConnect", "twsContract", "twsExecutionFilter",
"twsOrder")
exportMethods("show")
My .onLoad function contains ".jpackage(pkgname)".
I tried to package just the class twsConnect without the slot reference,
and things worked out fine. I tried to say that twsConnect contains
"jobjRef" but did not have much success.
Thanks a lot,
Adrian Dragulescu
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