/*
* $Id: SelectNode.java,v 1.5 2002/09/16 08:05:05 jkl Exp $
*
* Copyright (c) 2002 Njet Communications Ltd. All Rights Reserved.
*
* Use is subject to license terms, as defined in
* Anvil Sofware License, Version 1.1. See LICENSE
* file, or http://njet.org/license-1.1.txt
*/
package anvil.script.expression;
import anvil.core.Any;
import anvil.codec.Code;
import anvil.codec.Source;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import java.io.IOException;
/**
* class SelectNode
*
* @author: Jani Lehtim�ki
*/
public class SelectNode extends BinaryParent
{
public SelectNode(Node left, Node right)
{
super(left,right);
}
public int typeOf()
{
return Node.EXPR_SELECT;
}
public Any eval()
{
Any left = _left.eval();
if (left.toBoolean()) {
return left;
} else {
return _right.eval();
}
}
public void compile(ByteCompiler context, int operation)
{
_left.compile(context, CHECK);
Code code = context.getCode();
code.dup();
code.invokevirtual(code.getPool().addMethodRef(context.TYPE_ANY,
"toBoolean", "()Z"));
Source iftrue = code.if_ne();
code.pop();
_right.compile(context, GET);
iftrue.bind();
if (operation == GET_BOOLEAN) {
context.any2boolean();
}
}
}