1/*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package jdk.vm.ci.hotspot;
24
25/**
26 * An empty implementation for {@link EventProvider}. This implementation is used when no logging is
27 * requested.
28 */
29final class EmptyEventProvider implements EventProvider {
30
31    static InternalError shouldNotReachHere() {
32        throw new InternalError("should not reach here");
33    }
34
35    @Override
36    public CompilationEvent newCompilationEvent() {
37        return new EmptyCompilationEvent();
38    }
39
40    static class EmptyCompilationEvent implements CompilationEvent {
41        public void commit() {
42            throw shouldNotReachHere();
43        }
44
45        public boolean shouldWrite() {
46            // Events of this class should never been written.
47            return false;
48        }
49
50        public void begin() {
51        }
52
53        public void end() {
54        }
55
56        public void setMethod(String method) {
57            throw shouldNotReachHere();
58        }
59
60        public void setCompileId(int compileId) {
61            throw shouldNotReachHere();
62        }
63
64        public void setCompileLevel(int compileLevel) {
65            throw shouldNotReachHere();
66        }
67
68        public void setSucceeded(boolean succeeded) {
69            throw shouldNotReachHere();
70        }
71
72        public void setIsOsr(boolean isOsr) {
73            throw shouldNotReachHere();
74        }
75
76        public void setCodeSize(int codeSize) {
77            throw shouldNotReachHere();
78        }
79
80        public void setInlinedBytes(int inlinedBytes) {
81            throw shouldNotReachHere();
82        }
83    }
84
85    @Override
86    public CompilerFailureEvent newCompilerFailureEvent() {
87        return new EmptyCompilerFailureEvent();
88    }
89
90    static class EmptyCompilerFailureEvent implements CompilerFailureEvent {
91        public void commit() {
92            throw shouldNotReachHere();
93        }
94
95        public boolean shouldWrite() {
96            // Events of this class should never been written.
97            return false;
98        }
99
100        public void setCompileId(int compileId) {
101            throw shouldNotReachHere();
102        }
103
104        public void setMessage(String message) {
105            throw shouldNotReachHere();
106        }
107    }
108
109}
110