org.apache.inlong.sort.filesystem.shaded.software.amazon.ion.util.Spans Maven / Gradle / Ivy
/*
* Copyright 2011-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at:
*
* http://aws.amazon.com/apache2.0/
*
* or in the "license" file accompanying this file. This file 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 software.amazon.ion.util;
import static software.amazon.ion.facet.Facets.asFacet;
import software.amazon.ion.Span;
import software.amazon.ion.SpanProvider;
/**
* Utility methods for working with {@link Span}s.
*
*/
public final class Spans
{
/**
* Attempts to get a {@link Span} from the given object, if it
* supports {@link SpanProvider#currentSpan()}.
*
* @param spanProvider may be null.
* @return null if there's not a current span.
*/
public static Span currentSpan(Object spanProvider)
{
SpanProvider sp = asFacet(SpanProvider.class, spanProvider);
Span span = (sp == null ? null : sp.currentSpan());
return span;
}
/**
* Attempts to get a {@link Span} facet from the given object, if it
* supports {@link SpanProvider#currentSpan()}.
*
* @param spanProvider may be null.
* @return null if there's not a current span supporting
* {@code spanFacetType}.
*/
public static T currentSpan(Class spanFacetType,
Object spanProvider)
{
Span span = currentSpan(spanProvider);
T spanFacet = asFacet(spanFacetType, span);
return spanFacet;
}
}