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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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,
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 *
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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/**
 * 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 ProviderSkeleton.createProvider() for more details. 
Returns:
a provider whose probe trigger are no-ops./**
     * 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) {
    }
}