Warner.java revision 2571:10fc81ac75b4 
1/*
2 * Copyright (c) 2003, 2010, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.tools.javac.util;
27
28import com.sun.tools.javac.code.Lint.LintCategory;
29import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
30import java.util.EnumSet;
31
32/**
33 * An interface to support optional warnings, needed for support of
34 * unchecked conversions and unchecked casts.
35 *
36 * <p><b>This is NOT part of any supported API.
37 * If you write code that depends on this, you do so at your own risk.
38 * This code and its internal interfaces are subject to change or
39 * deletion without notice.</b>
40 */
41public class Warner {
42
43    private DiagnosticPosition pos = null;
44    protected boolean warned = false;
45    private EnumSet<LintCategory> nonSilentLintSet = EnumSet.noneOf(LintCategory.class);
46    private EnumSet<LintCategory> silentLintSet = EnumSet.noneOf(LintCategory.class);
47
48    public DiagnosticPosition pos() {
49        return pos;
50    }
51
52    public void warn(LintCategory lint) {
53        nonSilentLintSet.add(lint);
54    }
55
56    public void silentWarn(LintCategory lint) {
57        silentLintSet.add(lint);
58    }
59
60    public Warner(DiagnosticPosition pos) {
61        this.pos = pos;
62    }
63
64    public boolean hasSilentLint(LintCategory lint) {
65        return silentLintSet.contains(lint);
66    }
67
68    public boolean hasNonSilentLint(LintCategory lint) {
69        return nonSilentLintSet.contains(lint);
70    }
71
72    public boolean hasLint(LintCategory lint) {
73        return hasSilentLint(lint) ||
74                hasNonSilentLint(lint);
75    }
76
77    public void clear() {
78        nonSilentLintSet.clear();
79        silentLintSet.clear();
80        this.warned = false;
81    }
82
83    public Warner() {
84        this(null);
85    }
86}
87