| /* |
| * Copyright (c) 2008, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 sun.tracing; |
| |
| import java.lang.reflect.Method; |
| |
| import com.sun.tracing.ProviderFactory; |
| import com.sun.tracing.Provider; |
| |
| /** |
| * Factory class to create tracing Providers. |
| * |
| * This factory will create tracing instances that do nothing. |
| * It is used when no tracing is desired, but Provider instances still |
| * must be generated so that tracing calls in the application continue to |
| * run. |
| * |
| * @since 1.7 |
| */ |
| public class NullProviderFactory extends ProviderFactory { |
| |
| /** |
| * Creates and returns a Null provider. |
| * |
| * See comments at {@code ProviderSkeleton.createProvider()} for more |
| * details. |
| * |
| * @return a provider whose probe trigger are no-ops. |
| */ |
| public <T extends Provider> T createProvider(Class<T> cls) { |
| NullProvider provider = new NullProvider(cls); |
| provider.init(); |
| return provider.newProxyInstance(); |
| } |
| } |
| |
| class NullProvider extends ProviderSkeleton { |
| |
| NullProvider(Class<? extends Provider> type) { |
| super(type); |
| } |
| |
| protected ProbeSkeleton createProbe(Method m) { |
| return new NullProbe(m.getParameterTypes()); |
| } |
| } |
| |
| class NullProbe extends ProbeSkeleton { |
| |
| public NullProbe(Class<?>[] parameters) { |
| super(parameters); |
| } |
| |
| public boolean isEnabled() { |
| return false; |
| } |
| |
| public void uncheckedTrigger(Object[] args) { |
| } |
| } |
| |