jcast

From rJava v0.4-11 by Simon Urbanek

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)

Arguments

obj: a Java object reference
new.class: fully qualified class name in JNI notation (e.g. "java/lang/String"). Although rJava itself performs no type check in .jcast, Java will produce an exception on the first use if the cast is illegal.

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) No type check is performed and the original object is not modified.

Value

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

Examples

v <- .jnew("java/util/Vector")
.jcall("java/lang/System","I","identityHashCode",.jcast(v, "java/lang/Object"))

Documentation reproduced from package rJava, version 0.4-11, License: GPL version 2

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