Showing the changes to java/pkg/sun/tracing/NullProviderFactory.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2008, 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.tracing; | |
| 27 | + | |
| 28 | +import java.lang.reflect.Method; | |
| 29 | + | |
| 30 | +import com.sun.tracing.ProviderFactory; | |
| 31 | +import com.sun.tracing.Provider; | |
| 32 | + | |
| 33 | +/** | |
| 34 | + * Factory class to create tracing Providers. | |
| 35 | + * | |
| 36 | + * This factory will create tracing instances that do nothing. | |
| 37 | + * It is used when no tracing is desired, but Provider instances still | |
| 38 | + * must be generated so that tracing calls in the application continue to | |
| 39 | + * run. | |
| 40 | + * | |
| 41 | + * @since 1.7 | |
| 42 | + */ | |
| 43 | +public class NullProviderFactory extends ProviderFactory { | |
| 44 | + | |
| 45 | + /** | |
| 46 | + * Creates and returns a Null provider. | |
| 47 | + * | |
| 48 | + * See comments at {@code ProviderSkeleton.createProvider()} for more | |
| 49 | + * details. | |
| 50 | + * | |
| 51 | + * @return a provider whose probe trigger are no-ops. | |
| 52 | + */ | |
| 53 | + public <T extends Provider> T createProvider(Class<T> cls) { | |
| 54 | + NullProvider provider = new NullProvider(cls); | |
| 55 | + provider.init(); | |
| 56 | + return provider.newProxyInstance(); | |
| 57 | + } | |
| 58 | +} | |
| 59 | + | |
| 60 | +class NullProvider extends ProviderSkeleton { | |
| 61 | + | |
| 62 | + NullProvider(Class<? extends Provider> type) { | |
| 63 | + super(type); | |
| 64 | + } | |
| 65 | + | |
| 66 | + protected ProbeSkeleton createProbe(Method m) { | |
| 67 | + return new NullProbe(m.getParameterTypes()); | |
| 68 | + } | |
| 69 | +} | |
| 70 | + | |
| 71 | +class NullProbe extends ProbeSkeleton { | |
| 72 | + | |
| 73 | + public NullProbe(Class<?>[] parameters) { | |
| 74 | + super(parameters); | |
| 75 | + } | |
| 76 | + | |
| 77 | + public boolean isEnabled() { | |
| 78 | + return false; | |
| 79 | + } | |
| 80 | + | |
| 81 | + public void uncheckedTrigger(Object[] args) { | |
| 82 | + } | |
| 83 | +} | |
| 84 | + | |