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  *
  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  */
  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 
  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     protected String name;
  63 
  64     /**
  65      * Controls whether {@link #toString()} includes the qualified or simple name of the class in
  66      * which the method is declared.
  67      */
  68     public static final boolean FULLY_QUALIFIED_METHOD_NAME = false;
  69 
  70     protected HotSpotMethod(String name) {
  71         this.name = name;
  72     }
  73 
  74     @Override
  75     public final String getName() {
  76         return name;
  77     }
  78 
  79     @Override
  80     public final String toString() {
  81         char h = FULLY_QUALIFIED_METHOD_NAME ? 'H' : 'h';
  82         String suffix = this instanceof ResolvedJavaMethod ? "" : ", unresolved";
  83         String fmt = String.format("HotSpotMethod<%%%c.%%n(%%p)%s>", h, suffix);
  84         return format(fmt);
  85     }
  86 
  87     public void formatTo(Formatter formatter, int flags, int width, int precision) {
  88         String base = (flags & ALTERNATE) == ALTERNATE ? getName() : toString();
  89         formatter.format(applyFormattingFlagsAndWidth(base, flags & ~ALTERNATE, width));
  90     }
  91 
  92     public JavaMethod asJavaMethod() {
  93         return this;
  94     }
  95 }