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Ref.java
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/*-
* =LICENSE=
* ORAS Java SDK
* ===
* Copyright (C) 2024 - 2025 ORAS
* ===
* 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.
* =LICENSEEND=
*/
package land.oras;
import land.oras.utils.SupportedAlgorithm;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;
/**
* A referer of a container on a {@link OCI}.
*/
@NullMarked
public abstract sealed class Ref permits ContainerRef, LayoutRef {
/**
* The tag of the container.
*/
protected @Nullable final String tag;
/**
* Default constructor
*/
protected Ref(String tag) {
this.tag = tag;
}
/**
* Get the tag
* @return The tag
*/
public @Nullable String getTag() {
return tag;
}
/**
* Return the ref with the digest
* @param digest The digest
* @return The ref
*/
public abstract Ref withDigest(String digest);
/**
* Get the algorithm
* @return The algorithm
*/
public abstract SupportedAlgorithm getAlgorithm();
/**
* Get the repository where to find the ref
* @return The repository
*/
public abstract String getRepository();
}