| sparkR.callJStatic {SparkR} | R Documentation |
Call a static method in the JVM running the Spark driver. The return value is automatically converted to R objects for simple objects. Other values are returned as "jobj" which are references to objects on JVM.
sparkR.callJStatic(x, methodName, ...)
x |
fully qualified Java class name that contains the static method to invoke. |
methodName |
name of static method to invoke. |
... |
parameters to pass to the Java method. |
This is a low level function to access the JVM directly and should only be used for advanced use cases. The arguments and return values that are primitive R types (like integer, numeric, character, lists) are automatically translated to/from Java types (like Integer, Double, String, Array). A full list can be found in serialize.R and deserialize.R in the Apache Spark code base.
the return value of the Java method. Either returned as a R object if it can be deserialized or returned as a "jobj". See details section for more.
sparkR.callJStatic since 2.0.1
sparkR.callJMethod, sparkR.newJObject
## Not run:
##D sparkR.session() # Need to have a Spark JVM running before calling callJStatic
##D sparkR.callJStatic("java.lang.System", "currentTimeMillis")
##D sparkR.callJStatic("java.lang.System", "getProperty", "java.home")
## End(Not run)