69 lines
2.6 KiB
Java
69 lines
2.6 KiB
Java
/*
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* Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package vm.mlvm.meth.share;
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public class RandomValueGen {
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private static final int MAX_DISTINCT_TRIES = 11;
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/*
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* Primitive values are returned boxed. void is returned as null String
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* contains 0..100 random characters
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*/
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public static Object next(Class<?> type) throws InstantiationException, IllegalAccessException {
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return TestTypes.nextRandomValueForType(type);
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}
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public static Object nextDistinct(Class<?> type, Object notEqualTo) throws InstantiationException, IllegalAccessException {
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Object nonEqualValue;
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for ( int i = MAX_DISTINCT_TRIES; i > 0; i -- ){
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nonEqualValue = next(type);
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if ( ! nonEqualValue.equals(notEqualTo) )
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return nonEqualValue;
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}
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// A workaround for booleans. Sometimes RNG produces long series of trues or falses
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if ( type.equals(Boolean.class) || type.equals(boolean.class) )
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return new Boolean(! (Boolean) notEqualTo);
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throw new InstantiationException("Can't create distinct value for type=[" + type.getName() + "]; value=[" + notEqualTo + "]");
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}
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public static void main(String[] args) {
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for (int i = 0; i < 10; i++) {
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Class<?> type = RandomTypeGen.next();
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Object value;
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try {
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value = next(type);
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System.out.println("type=[" + type + "], value=[" + value + "]");
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} catch (Exception e) {
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System.err.println("type=[" + type + "]");
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e.printStackTrace();
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}
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}
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}
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}
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