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/*
* Main.java
*
* Copyright (C) 2008 Ville Voutilainen
* $Id$
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
import org.armedbear.lisp.*;
public class Main
{
/**
* This example creates an Interpreter instance, loads our
* lisp code from a file and then looks up two functions defined
* in the loaded lisp file and executes the functions.
*
* The first function takes a single parameter and prints its value,
* so we can provide any Object, so we use a String.
*
* The second function takes two numbers, adds them together, prints
* the parameters and the result, and returns the result.
* We use two integers as parameters and just print the result
* from java side.
*/
public static void main(String[] argv)
{
try
{
Interpreter interpreter = Interpreter.createInstance();
interpreter.eval("(load \"lispfunctions.lisp\")");
// the function is not in a separate package, thus the
// correct package is CL-USER. Symbol names are
// upper case. Package needs the prefix, because java
// also has a class named Package.
org.armedbear.lisp.Package defaultPackage =
Packages.findPackage("CL-USER");
Symbol voidsym =
defaultPackage.findAccessibleSymbol("VOID-FUNCTION");
Function voidFunction = (Function) voidsym.getSymbolFunction();
voidFunction.execute(new JavaObject("String given from java"));
Symbol intsym =
defaultPackage.findAccessibleSymbol("INT-FUNCTION");
Function intFunction = (Function) intsym.getSymbolFunction();
LispObject result =
intFunction.execute(new JavaObject(1),
new JavaObject(6));
System.out.print("The result on the java side: ");
System.out.println(result.intValue());
}
catch (Throwable t)
{
System.out.println("exception!");
t.printStackTrace();
}
}
}
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