org.rosuda.REngine
Class REXPJavaReference

java.lang.Object
  org.rosuda.REngine.REXP
      org.rosuda.REngine.REXPJavaReference

public class REXPJavaReference
extends REXP

REXPJavaReference is a reference to a Java object that has been resolved from is R wrapper. Note that not all engines support references.

Field Summary

Fields inherited from class org.rosuda.REngine.REXP

attr, maxDebugItems

Constructor Summary

REXPJavaReference(java.lang.Object o)
creates a new Java reference R object

REXPJavaReference(java.lang.Object o, REXPList attr)
creates a new Java reference R object

Method Summary

java.lang.Object	asNativeJavaObject() attempt to represent the REXP by a native Java object and return it.
java.lang.Object	getObject() returns the Java object referenced by this REXP
java.lang.String	toString() returns a string description of the object

Methods inherited from class org.rosuda.REngine.REXP

_attr, asBytes, asDouble, asDoubleMatrix, asDoubles, asFactor, asInteger, asIntegers, asList, asString, asStrings, createDataFrame, dim, getAttribute, hasAttribute, inherits, isComplex, isEnvironment, isExpression, isFactor, isInteger, isLanguage, isList, isLogical, isNA, isNull, isNumeric, isPairList, isRaw, isRecursive, isReference, isString, isSymbol, isVector, length, toDebugString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

REXPJavaReference

public REXPJavaReference(java.lang.Object o)

creates a new Java reference R object

Parameters:

o - Java object referenced by the REXP

REXPJavaReference

public REXPJavaReference(java.lang.Object o,
                         REXPList attr)

creates a new Java reference R object

Parameters:

o - Java object referenced by the REXP

attr - attributes (of the R wrapper)

Method Detail

getObject

public java.lang.Object getObject()

returns the Java object referenced by this REXP

Returns:

Java object

asNativeJavaObject

public java.lang.Object asNativeJavaObject()

Description copied from class: REXP

attempt to represent the REXP by a native Java object and return it. Note that this may lead to loss of information (e.g., factors may be returned as a string array) and attributes are ignored. Not all R types can be converted to native Java objects. Also note that R has no concept of scalars, so vectors of length 1 will always be returned as an arrays (i.e., int[1] and not Integer).

Overrides:

asNativeJavaObject in class REXP

toString

public java.lang.String toString()

Description copied from class: REXP

returns a string description of the object

Overrides:

toString in class REXP

Returns:

string describing the object - it can be of an arbitrary form and used only for debugging (do not confuse with REXP.asString() for accessing string REXPs)