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// nqp$ javac -cp bin/ examples/CallFromJava.java
// nqp$ java -cp nqp-runtime.jar:3rdparty/asm/asm-4.1.jar:3rdparty/asm/asm-tree-4.1.jar:. examples.CallFromJava nqp.jar nqp 'say(2+2)'
// 4
// rakudo$ java -cp ../nqp-jvm:../nqp-jvm/3rdparty/asm/asm-4.1.jar:../nqp-jvm/3rdparty/asm/asm-tree-4.1.jar:../nqp-jvm/nqp-runtime.jar:rakudo-runtime.jar:. examples.CallFromJava perl6.jar perl6 'say 2 + 2'
// 4
// Note: curently nqp only functions properly in the application class path.
package examples;
import org.perl6.nqp.runtime.*;
import static org.perl6.nqp.runtime.CallSiteDescriptor.*;
import org.perl6.nqp.sixmodel.*;
public class CallFromJava {
private GlobalContext g;
private ThreadContext t;
private SixModelObject nqpComp;
private CallFromJava(String bytecode, String hll) {
g = new GlobalContext();
t = g.getCurrentThreadContext();
Ops.loadbytecode(bytecode, t);
nqpComp = Ops.getcomp(hll, t);
}
private SixModelObject eval(String nqp) {
Ops.invokeDirect(t, Ops.findmethod(t, nqpComp, "compile"),
new CallSiteDescriptor(new byte[] { ARG_OBJ, ARG_STR }, null),
new Object[] { nqpComp, nqp });
Ops.invokeDirect(t, Ops.result_o(t.resultFrame()), Ops.emptyCallSite, Ops.emptyArgList);
return Ops.result_o(t.resultFrame());
}
public static void main(String[] args) {
CallFromJava nqp = new CallFromJava(args[0], args[1]);
nqp.eval(args[2]);
}
}
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