01: /*
02: * $Id: ConcatenationNode.java,v 1.6 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 ConcatenationNode
20: *
21: * @author: Jani Lehtimäki
22: */
23: public class ConcatenationNode extends BinaryParent {
24:
25: public ConcatenationNode(Node left, Node right) {
26: super (left, right);
27: }
28:
29: public int typeOf() {
30: return Node.EXPR_CONCATENATION;
31: }
32:
33: public Any eval() {
34: Any a = _left.eval();
35: Any b = _right.eval();
36: return a.concat(b);
37: }
38:
39: public void compile(ByteCompiler context, int operation) {
40: super .compile(context, GET);
41: Code code = context.getCode();
42: code.invokevirtual(code.getPool().addMethodRef(
43: context.TYPE_ANY, "concat",
44: "(Lanvil/core/Any;)Lanvil/core/Any;"));
45: if (operation == GET_BOOLEAN) {
46: context.any2boolean();
47: }
48: }
49:
50: }
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