org.nuiton.j2r.jni
Class RJniEngine

java.lang.Object
  org.nuiton.j2r.REngineAbstract
      org.nuiton.j2r.jni.RJniEngine

All Implemented Interfaces:

REngine

public class RJniEngine
extends REngineAbstract
implements REngine

RJniEngine.java Created: 22 aout 2006

Author:

Arnaud Thimel

Constructor Summary

RJniEngine()

Method Summary

void	commit() Method to commit all the R instructions stored when not in autocommit mode.
protected Object	convertResult(org.rosuda.JRI.REXP rexp) Convert the result from an R expression to a java object.
protected RDataFrame	convertToDataFrame(org.rosuda.JRI.REXP rexp)
protected RList	convertToRList(org.rosuda.JRI.REXP rexp)
Object	eval(String expr) Evaluate a R expression in R and get back the result.
Object	evalScript(String expr) Evaluate a R multi-line expression in R and get back the result.
boolean	init() Initialize the R engine.
void	terminate() Terminate the R connection.
void	voidEval(String expr) Evaluate a R expression in R without getting back the result.

Methods inherited from class org.nuiton.j2r.REngineAbstract

clearSession, cp, dget, dget, dput, dput, getwd, isAutoCommit, loadRData, loadRData, loadRData, ls, mv, plot, remove, saveRData, saveRData, saveRData, setAutoCommit, setwd

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.nuiton.j2r.REngine

clearSession, cp, dget, dget, dput, dput, getwd, isAutoCommit, loadRData, loadRData, loadRData, ls, mv, plot, remove, saveRData, saveRData, saveRData, setAutoCommit, setwd

Constructor Detail

RJniEngine

public RJniEngine()

Method Detail

init

public boolean init()

Initialize the R engine.

Specified by:

init in interface REngine

Returns:

true if initialized, false otherwise.

See Also:

REngine.init()

eval

public Object eval(String expr)
            throws RException

Evaluate a R expression in R and get back the result.

Specified by:

eval in interface REngine

Parameters:

expr - the R expression to evaluate.

Returns:

the result of the R expression.

Throws:

RException - if an error occur while trying to evaluate the expression.

See Also:

REngine.eval(java.lang.String)

evalScript

public Object evalScript(String expr)
                  throws RException

Evaluate a R multi-line expression in R and get back the result.

Specified by:

evalScript in interface REngine

Parameters:

expr - the R expression to evaluate.

Returns:

the result of the R expression.

Throws:

RException - if an error occur while trying to evaluate the expression.

See Also:

REngine.eval(java.lang.String)

convertResult

protected Object convertResult(org.rosuda.JRI.REXP rexp)

Convert the result from an R expression to a java object.

Parameters:

rexp - the R expression to convert.

Returns:

the java object corresponding to the R expression.

convertToDataFrame

protected RDataFrame convertToDataFrame(org.rosuda.JRI.REXP rexp)

convertToRList

protected RList convertToRList(org.rosuda.JRI.REXP rexp)

terminate

public void terminate()

Terminate the R connection.

Specified by:

terminate in interface REngine

See Also:

REngine.terminate()

voidEval

public void voidEval(String expr)
              throws RException

Evaluate a R expression in R without getting back the result. If in non-autocommit mode, expression is stored and evaluated only when the commit() method is called.

Specified by:

voidEval in interface REngine

Parameters:

expr - the R expression to evaluate.

Throws:

RException - if an error occured while trying to evaluate the expression.

See Also:

REngine.voidEval(java.lang.String), commit()

commit

public void commit()
            throws RException

Method to commit all the R instructions stored when not in autocommit mode.

Specified by:

commit in interface REngine

Throws:

RException - if an error occur while evaluating the instructions in R.

See Also:

REngine.commit()