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/*
* Copyright 2017, OpenCensus 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.opencensus.implcore.tags;
import io.opencensus.common.Scope;
import io.opencensus.implcore.internal.NoopScope;
import io.opencensus.tags.TagContext;
import io.opencensus.tags.TagContextBuilder;
import io.opencensus.tags.TagKey;
import io.opencensus.tags.TagValue;
/** {@link TagContextBuilder} that is used when tagging is disabled. */
final class NoopTagContextBuilder extends TagContextBuilder {
static final NoopTagContextBuilder INSTANCE = new NoopTagContextBuilder();
private NoopTagContextBuilder() {}
@Override
public TagContextBuilder put(TagKey key, TagValue value) {
return this;
}
@Override
public TagContextBuilder remove(TagKey key) {
return this;
}
@Override
public TagContext build() {
return TagContextImpl.EMPTY;
}
@Override
public Scope buildScoped() {
return NoopScope.getInstance();
}
}
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