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/**
 * Copyright 2016 The OpenTracing Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package io.opentracing.impl;

import io.opentracing.SpanContext;
import io.opentracing.propagation.Format;
import java.util.Collections;
import java.util.Map;

final class NoopTracer extends AbstractTracer implements io.opentracing.NoopTracer {

    private static final NoopTracer INSTANCE = new NoopTracer();

    @Override
    public  void inject(SpanContext spanContext, Format format, C carrier) {}

    @Override
    public  SpanBuilder extract(Format format, C carrier) {
        return io.opentracing.NoopSpanBuilder.INSTANCE;
    }

    @Override
    AbstractSpanBuilder createSpanBuilder(String operationName) {
        return NoopSpanBuilder.INSTANCE;
    }

    @Override
    Map getTraceState(SpanContext spanContext) {
        return Collections.emptyMap();
    }


}