01: /*
02: * $Id: EmptyReferenceNode.java,v 1.9 2002/09/16 08:05:04 jkl Exp $
03: *
04: * Copyright (c) 2002 Njet Communications Ltd. All Rights Reserved.
05: *
06: * Use is subject to license terms, as defined in
07: * Anvil Sofware License, Version 1.1. See LICENSE
08: * file, or http://njet.org/license-1.1.txt
09: */
10: package anvil.script.expression;
11:
12: import anvil.core.Any;
13: import anvil.codec.Code;
14: import anvil.script.compiler.ByteCompiler;
15: import anvil.script.Context;
16: import java.io.IOException;
17:
18: /**
19: * class EmptyReferenceNode
20: *
21: * @author: Jani Lehtimäki
22: */
23: public class EmptyReferenceNode extends UnaryParent {
24:
25: public EmptyReferenceNode(Node self) {
26: super (self);
27: }
28:
29: public int typeOf() {
30: return EXPR_EMPTY_REFERENCE;
31: }
32:
33: public boolean isConstant() {
34: return false;
35: }
36:
37: public void compile(ByteCompiler context, Node child) {
38: Code code = context.getCode();
39: _child.compile(context, GET);
40: code.aload_first();
41: child.compile(context, GET);
42: code
43: .invokevirtual(code
44: .getPool()
45: .addMethodRef(context.TYPE_ANY, "setReference",
46: "(Lanvil/script/Context;Lanvil/core/Any;)Lanvil/core/Any;"));
47: }
48:
49: public void compile(ByteCompiler context, int operation) {
50: }
51:
52: }
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