org.af.jhlir.call
Class RCallServices

java.lang.Object
  org.af.jhlir.call.RCallServices

public abstract class RCallServices
extends Object

Field Summary

static String	NA_CHAR String value that codes a NA for a character
static String	NA_FACTOR String value that codes a NA for a factor
static Integer	NA_RINTEGER Integer value that codes a NA
static Boolean	NA_RLOGICAL Boolean value that codes a NA
static Double	NA_RNUMERIC Double value that codes a NA

Constructor Summary

RCallServices()

Method Summary

abstract void	assign(String varName, String expression) Assigns the result of evaluating the expression to a variable.
abstract RObj	call(String function, Object... args) Calls a function with the given arguments.
abstract RObj	eval(String expression) Evaluates an expression and returns the result.
abstract RRef	evalAndGetRef(String expression) Evaluates an expression and returns the result as a reference.
abstract void	evalVoid(String expression) Evaluates an expression.
abstract String[]	getWarning() If there was generated at least one warning on R side by the last eval, evalVoid, evalAndGetRef,assign, call or put command, this method returns the warnings.
abstract void	put(String varName, Object obj) TODO

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NA_RINTEGER

public static Integer NA_RINTEGER

Integer value that codes a NA

NA_RNUMERIC

public static Double NA_RNUMERIC

Double value that codes a NA

NA_RLOGICAL

public static Boolean NA_RLOGICAL

Boolean value that codes a NA

NA_CHAR

public static String NA_CHAR

String value that codes a NA for a character

NA_FACTOR

public static String NA_FACTOR

String value that codes a NA for a factor

Constructor Detail

RCallServices

public RCallServices()

Method Detail

evalVoid

public abstract void evalVoid(String expression)
                       throws REngineException

Evaluates an expression.

Parameters:

expression -

Throws:

REngineException

eval

public abstract RObj eval(String expression)
                   throws REngineException

Evaluates an expression and returns the result.

Parameters:

expression - expression to be evaluated

Returns:

the result of evaluating the expression

Throws:

REngineException

evalAndGetRef

public abstract RRef evalAndGetRef(String expression)
                            throws RemoteException

Evaluates an expression and returns the result as a reference.

Parameters:

expression - expression to be evaluated

Returns:

a reference to the result of evaluating the expression

Throws:

RemoteException

assign

public abstract void assign(String varName,
                            String expression)
                     throws RemoteException

Assigns the result of evaluating the expression to a variable.

Parameters:

varName - variable name that the result should be assigned to

expression - expression to be evaluated

Throws:

RemoteException

call

public abstract RObj call(String function,
                          Object... args)
                   throws RemoteException

Calls a function with the given arguments. The arguments can be of Type RObj ... TODO What is allowed to pass here?

Parameters:

function - name of the function to be called

args - arguments to be part of the call

Throws:

RemoteException

put

public abstract void put(String varName,
                         Object obj)
                  throws REngineException

TODO

Parameters:

varName -

obj -

Throws:

RemoteException

REngineException

getWarning

public abstract String[] getWarning()

If there was generated at least one warning on R side by the last eval, evalVoid, evalAndGetRef,assign, call or put command, this method returns the warnings. Otherwise it returns null.

Returns:

the warnings and null if no warning was generated.