jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/util/Constants.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/util/Constants.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/util/Constants.java

Sun, 17 Feb 2013 16:44:55 -0500

author: dholmes
date: Sun, 17 Feb 2013 16:44:55 -0500
changeset 1571: af8417e590f4
parent 1374: c002fdee76fd
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javac.util;
 import com.sun.tools.javac.code.Type;
 /**
  * Utilities for operating on constant values.
  *
  * <p><b>This is NOT part of any supported API.
  * If you write code that depends on this, you do so at your own risk.
  * This code and its internal interfaces are subject to change or
  * deletion without notice.</b>
  */
 public class Constants {
     /**
      * Converts a constant in internal representation (in which
      * boolean, char, byte, short, and int are each represented by an
      * Integer) into standard representation.  Other values (including
      * null) are returned unchanged.
      */
     public static Object decode(Object value, Type type) {
         if (value instanceof Integer) {
             int i = (Integer) value;
             switch (type.getTag()) {
             case BOOLEAN:  return i != 0;
             case CHAR:     return (char) i;
             case BYTE:     return (byte) i;
             case SHORT:    return (short) i;
             }
         }
         return value;
     }
     /**
      * Returns a string representation of a constant value (given in
      * internal representation), quoted and formatted as in Java source.
      */
     public static String format(Object value, Type type) {
         value = decode(value, type);
         switch (type.getTag()) {
         case BYTE:      return formatByte((Byte) value);
         case LONG:      return formatLong((Long) value);
         case FLOAT:     return formatFloat((Float) value);
         case DOUBLE:    return formatDouble((Double) value);
         case CHAR:      return formatChar((Character) value);
         }
         if (value instanceof String)
             return formatString((String) value);
         return value + "";
     }
     /**
      * Returns a string representation of a constant value (given in
      * standard wrapped representation), quoted and formatted as in
      * Java source.
      */
     public static String format(Object value) {
         if (value instanceof Byte)      return formatByte((Byte) value);
         if (value instanceof Short)     return formatShort((Short) value);
         if (value instanceof Long)      return formatLong((Long) value);
         if (value instanceof Float)     return formatFloat((Float) value);
         if (value instanceof Double)    return formatDouble((Double) value);
         if (value instanceof Character) return formatChar((Character) value);
         if (value instanceof String)    return formatString((String) value);
         if (value instanceof Integer ||
             value instanceof Boolean)   return value.toString();
         else
             throw new IllegalArgumentException("Argument is not a primitive type or a string; it " +
                                                ((value == null) ?
                                                 "is a null value." :
                                                 "has class " +
                                                 value.getClass().getName()) + "." );
     }
     private static String formatByte(byte b) {
         return String.format("(byte)0x%02x", b);
     }
     private static String formatShort(short s) {
         return String.format("(short)%d", s);
     }
     private static String formatLong(long lng) {
         return lng + "L";
     }
     private static String formatFloat(float f) {
         if (Float.isNaN(f))
             return "0.0f/0.0f";
         else if (Float.isInfinite(f))
             return (f < 0) ? "-1.0f/0.0f" : "1.0f/0.0f";
         else
             return f + "f";
     }
     private static String formatDouble(double d) {
         if (Double.isNaN(d))
             return "0.0/0.0";
         else if (Double.isInfinite(d))
             return (d < 0) ? "-1.0/0.0" : "1.0/0.0";
         else
             return d + "";
     }
     private static String formatChar(char c) {
         return '\'' + Convert.quote(c) + '\'';
     }
     private static String formatString(String s) {
         return '"' + Convert.quote(s) + '"';
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/util/Constants.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/util/Constants.java