default implementation of redirectCallBack - Maple Help

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EngineCallBacks.redirectCallBack - default implementation of redirectCallBack

Calling Sequence

String redirectCallBack( Object data, String name, boolean append ) throws MapleException




arbitrary data that was passed into the Engine constructor



filename that the user passed to writeto or appendto



true if the user called appendto



redirectCallBack is a member function of the com.maplesoft.openmaple.EngineCallBacksDefault class, which implements the EngineCallBacks interface.


This default implementation raises a MapleException stating that readlineCallBack is not implemented.


import com.maplesoft.openmaple.*;

import com.maplesoft.externalcall.MapleException;

class Example


    public static void main( String notused[] ) throws MapleException


    String mapleArgs[];

    Engine engine;

    mapleArgs = new String[1];

    mapleArgs[0] = "java";

    engine = new Engine( mapleArgs, new EngineCallBacksDefault(),

        null, null );



        engine.evaluate( "appendto( \file1\ );" );


    catch ( MapleException me )


        System.out.println( me.getMessage() );




Executing this code produces the following output.

Error, redirection was not implemented by the application

See Also

ExternalCalling/Java/MapleException, OpenMaple, OpenMaple/Java/Engine, OpenMaple/Java/Engine/Engine, OpenMaple/Java/EngineCallBacks, OpenMaple/Java/EngineCallBacks/redirectCallBack, OpenMaple/Java/EngineCallBacksDefault

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