1 /*
2  * Copyright (c) 2011, 2015, 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  *
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22  */
23 package jdk.vm.ci.hotspot;
24 
25 import static java.util.FormattableFlags.ALTERNATE;
26 import static java.util.FormattableFlags.LEFT_JUSTIFY;
27 import static java.util.FormattableFlags.UPPERCASE;
28 
29 import java.util.Formattable;
30 import java.util.Formatter;
31 
32 import jdk.vm.ci.meta.JavaMethod;
33 import jdk.vm.ci.meta.ResolvedJavaMethod;
34 
35 abstract class HotSpotMethod implements JavaMethod, Formattable {
36 
applyFormattingFlagsAndWidth(String s, int flags, int width)37     public static String applyFormattingFlagsAndWidth(String s, int flags, int width) {
38         if (flags == 0 && width < 0) {
39             return s;
40         }
41         StringBuilder sb = new StringBuilder(s);
42 
43         // apply width and justification
44         int len = sb.length();
45         if (len < width) {
46             for (int i = 0; i < width - len; i++) {
47                 if ((flags & LEFT_JUSTIFY) == LEFT_JUSTIFY) {
48                     sb.append(' ');
49                 } else {
50                     sb.insert(0, ' ');
51                 }
52             }
53         }
54 
55         String res = sb.toString();
56         if ((flags & UPPERCASE) == UPPERCASE) {
57             res = res.toUpperCase();
58         }
59         return res;
60     }
61 
62     /**
63      * Controls whether {@link #toString()} includes the qualified or simple name of the class in
64      * which the method is declared.
65      */
66     public static final boolean FULLY_QUALIFIED_METHOD_NAME = false;
67 
68     @Override
toString()69     public final String toString() {
70         char h = FULLY_QUALIFIED_METHOD_NAME ? 'H' : 'h';
71         String suffix = this instanceof ResolvedJavaMethod ? "" : ", unresolved";
72         String fmt = String.format("HotSpotMethod<%%%c.%%n(%%p)%s>", h, suffix);
73         return format(fmt);
74     }
75 
76     @Override
formatTo(Formatter formatter, int flags, int width, int precision)77     public void formatTo(Formatter formatter, int flags, int width, int precision) {
78         String base = (flags & ALTERNATE) == ALTERNATE ? getName() : toString();
79         formatter.format(applyFormattingFlagsAndWidth(base, flags & ~ALTERNATE, width));
80     }
81 
asJavaMethod()82     public JavaMethod asJavaMethod() {
83         return this;
84     }
85 }
86