1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
canonicalToStringForHashCode(String ivalue, String fvalue, int sign, int pvalue)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      */
main(String[] args)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 
test(String ival, String fval, int sign, int pvalue, String expected)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 }
104