jcast

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Cast a Java object to another class

.jcast returns a Java object reference cast to another Java class.

Keywords
interface
Usage
.jcast(obj, new.class = "java/lang/Object", check = FALSE, convert.array = FALSE)
Arguments
obj
a Java object reference
new.class
fully qualified class name in JNI notation (e.g. "java/lang/String").
check
logical. If TRUE, it is checked that the object effectively is an instance of the new class. See %instanceof%. Using FALSE (the default) for this argument, rJava does not perform type che
convert.array
logical. If TRUE and the object is an array, it is converted into a jarrayRef reference.
Details

This function is necessary if a argument of .jcall or .jnew is defined as the superclass of the object to be passed (see .jcall). The original object is not modified. The default values for the arguments check and convert.array is FALSE in order to guarantee backwards compatibility, but it is recommended to set the arguments to TRUE

Value

  • Returns a Java object reference (jobjRef) to the object obj, changing the object class.

See Also

.jcall

Aliases
  • .jcast
Examples
v <- .jnew("java/util/Vector")
.jcall("java/lang/System","I","identityHashCode",.jcast(v, "java/lang/Object"))
Documentation reproduced from package rJava, version 0.9-1, License: GPL-2

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