01: /*
02: * Copyright 2007 Google Inc.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License"); you may not
05: * use this file except in compliance with the License. You may obtain a copy of
06: * the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12: * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13: * License for the specific language governing permissions and limitations under
14: * the License.
15: */
16: package com.google.gwt.dev.jjs.ast;
17:
18: import com.google.gwt.dev.jjs.SourceInfo;
19:
20: /**
21: * Java cast expression.
22: */
23: public class JCastOperation extends JExpression {
24:
25: private JExpression expr;
26: private final JType castType;
27:
28: public JCastOperation(JProgram program, SourceInfo info,
29: JType castType, JExpression expr) {
30: super (program, info);
31: this .castType = castType;
32: this .expr = expr;
33: }
34:
35: public JType getCastType() {
36: return castType;
37: }
38:
39: public JExpression getExpr() {
40: return expr;
41: }
42:
43: public JType getType() {
44: return castType;
45: }
46:
47: public boolean hasSideEffects() {
48: // Any live cast operations might throw a ClassCastException
49: //
50: // TODO: revisit this when we support the concept of whether something
51: // can/must complete normally!
52: return true;
53: }
54:
55: public void traverse(JVisitor visitor, Context ctx) {
56: if (visitor.visit(this, ctx)) {
57: expr = visitor.accept(expr);
58: }
59: visitor.endVisit(this, ctx);
60: }
61:
62: }
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