Exceptions

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Percentile

Exception handling

R handling of java exception

Usage
# S3 method for Throwable
$(x, name )
	# S3 method for Throwable
$(x, name ) <- value
Arguments
x

condition

name

...

value

...

Details

Java exceptions are mapped to R conditions that are relayed by the stop function.

The R condition contains the actual exception object as the jobj item.

The class name of the R condition is made of a vector of simple java class names, the class names without their package path. This allows the R code to use direct handlers similar to direct exception handlers in java. See the example below.

Aliases
  • Exceptions
  • $.Throwable
  • $<-.Throwable
Examples
# NOT RUN {
Integer <- J("java.lang.Integer")
tryCatch( Integer$parseInt( "10.." ), NumberFormatException = function(e){
	e$jobj$printStackTrace() 
} )

# the dollar method is also implemented for Throwable conditions, 
# so that syntactic sugar can be used on condition objects
# however, in the example below e is __not__ a jobjRef object reference
tryCatch( Integer$parseInt( "10.." ), NumberFormatException = function(e){
	e$printStackTrace() 
} )


# }
# NOT RUN {
# }
Documentation reproduced from package rJava, version 0.9-11, License: GPL-2

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