| /* |
| * Copyright (c) 2011, 2018, 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. |
| * |
| * 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 vm.mlvm.meth.share; |
| |
| public class RandomValueGen { |
| |
| private static final int MAX_DISTINCT_TRIES = 11; |
| |
| /* |
| * Primitive values are returned boxed. void is returned as null String |
| * contains 0..100 random characters |
| */ |
| public static Object next(Class<?> type) throws InstantiationException, IllegalAccessException { |
| return TestTypes.nextRandomValueForType(type); |
| } |
| |
| public static Object nextDistinct(Class<?> type, Object notEqualTo) throws InstantiationException, IllegalAccessException { |
| Object nonEqualValue; |
| for ( int i = MAX_DISTINCT_TRIES; i > 0; i -- ){ |
| nonEqualValue = next(type); |
| if ( ! nonEqualValue.equals(notEqualTo) ) |
| return nonEqualValue; |
| } |
| |
| // A workaround for booleans. Sometimes RNG produces long series of trues or falses |
| if ( type.equals(Boolean.class) || type.equals(boolean.class) ) |
| return new Boolean(! (Boolean) notEqualTo); |
| |
| throw new InstantiationException("Can't create distinct value for type=[" + type.getName() + "]; value=[" + notEqualTo + "]"); |
| } |
| |
| public static void main(String[] args) { |
| for (int i = 0; i < 10; i++) { |
| Class<?> type = RandomTypeGen.next(); |
| Object value; |
| try { |
| value = next(type); |
| System.out.println("type=[" + type + "], value=[" + value + "]"); |
| } catch (Exception e) { |
| System.err.println("type=[" + type + "]"); |
| e.printStackTrace(); |
| } |
| } |
| } |
| |
| |
| } |