1 /*
   2  * Copyright (c) 2013, 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 
  24 import java.lang.reflect.Method;
  25 
  26 /**
  27  * @test
  28  * @bug 8013900
  29  * @summary More warning compiling jaxp.
  30  *   This test only test one of the methods used to implement hashCode()
  31  *   in com.sun.org.apache.xerces.internal.impl.dv.xs.PrecisionDecimalDV$XPrecisionDecimal.
  32  *   Since that method is private the test unfortunately needs to use reflection
  33  *   to invoke the method.
  34  * @run main XPrecisionDecimalToString
  35  * @author Daniel Fuchs
  36  */
  37 public class XPrecisionDecimalToString {
  38 
  39     private static final String className =
  40             "com.sun.org.apache.xerces.internal.impl.dv.xs.PrecisionDecimalDV$XPrecisionDecimal";
  41     private static final String methodName = "canonicalToStringForHashCode";
  42     private static final Class<?>[] signature = { String.class, String.class, int.class, int.class };
  43     private static Method method;
  44 
  45     // Invokes XPrecisionDecimal.canonicalToStringForHashCode through reflection,
  46     // because the method is private...
  47     //
  48     // Construct a canonical String representation of this number
  49     // for the purpose of deriving a hashCode value compliant with
  50     // equals.
  51     // The toString representation will be:
  52     // NaN for NaN, INF for +infinity, -INF for -infinity, 0 for zero,
  53     // and [1-9]\.[0-9]*[1-9]?(E[1-9][0-9]*)? for other numbers.
  54     private static String canonicalToStringForHashCode(String ivalue, String fvalue, int sign, int pvalue) {
  55         try {
  56             if (method == null) {
  57                 Class<?> type = Class.forName(className);
  58                 method = type.getDeclaredMethod(methodName, signature);
  59                 method.setAccessible(true);
  60             }
  61         } catch (Exception x) {
  62             throw new Error("Impossible to find '"+className+"."+methodName+"': "+ x, x);
  63         }
  64         try {
  65             return (String) method.invoke(null, new Object[] {ivalue, fvalue, sign, pvalue} );
  66         } catch(Exception x) {
  67             throw new Error("Failed to invoke "+className+"."+methodName+"(\""+
  68                     ivalue+"\", \""+fvalue+"\", "+sign+", "+pvalue+"): " +x, x);
  69         }
  70     }
  71 
  72     /**
  73      * @param args the command line arguments
  74      */
  75     public static void main(String[] args) {
  76         test("123","7890",-1,0,"-1.23789E2");
  77         test("0","007890",-1,0,"-7.89E-3");
  78         test("123","7890",1,0,"1.23789E2");
  79         test("0","007890",1,0,"7.89E-3");
  80         test("123","7890",1,10,"1.23789E12");
  81         test("0","007890",1,33,"7.89E30");
  82         test("INF","",1,0,"INF");
  83         test("INF","",-1,0,"-INF");
  84         test("NaN","",0,0,"NaN");
  85         test("0","",1,0,"0");
  86         test("00000","00000",1,10,"0");
  87         test("00000","00000",-1,10,"0");
  88         test("00000","000001",-1,-10,"-1E-16");
  89     }
  90 
  91     private static void test(String ival, String fval, int sign, int pvalue, String expected) {
  92         final String canonical = canonicalToStringForHashCode(ival, fval, sign, pvalue);
  93         System.out.println((sign == -1 ? "-" : "") + ival + 
  94                 ("INF".equals(ival) || "NaN".equals(ival) ? "" 
  95                  : ( "." + fval + "E" + pvalue))
  96                 + " => "+ canonical);
  97         if (!expected.equals(canonical)) {
  98             throw new Error("expected: "+expected+" got: "+ canonical);
  99         }
 100     }
 101 
 102 
 103 }