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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.provision;
import com.yahoo.component.Version;
import java.util.Objects;
import java.util.Optional;
/**
* A Docker image.
*
* @author mpolden
*/
public class DockerImage {
public static final DockerImage EMPTY = new DockerImage("", Optional.empty());
private final String repository;
private final Optional<String> tag;
private DockerImage(String repository, Optional<String> tag) {
this.repository = Objects.requireNonNull(repository, "repository must be non-null");
this.tag = Objects.requireNonNull(tag, "tag must be non-null");
}
public String repository() {
return repository;
}
public Optional<String> tag() {
return tag;
}
/** Returns the tag as Version, {@link Version#emptyVersion} if tag is not set */
public Version tagAsVersion() {
return tag.map(Version::new).orElse(Version.emptyVersion);
}
/** Returns the Docker image tagged with the given version */
public DockerImage withTag(Version version) {
return new DockerImage(repository, Optional.of(version.toFullString()));
}
public String asString() {
return repository + tag.map(t -> ':' + t).orElse("");
}
@Override
public String toString() {
return asString();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
DockerImage that = (DockerImage) o;
return repository.equals(that.repository) &&
tag.equals(that.tag);
}
@Override
public int hashCode() {
return Objects.hash(repository, tag);
}
public static DockerImage fromString(String name) {
if (name.isEmpty()) return EMPTY;
int n = name.lastIndexOf(':');
if (n < 0) return new DockerImage(name, Optional.empty());
String tag = name.substring(n + 1);
if (!tag.contains("/")) {
return new DockerImage(name.substring(0, n), Optional.of(tag));
}
return new DockerImage(name, Optional.empty());
}
}
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