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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.http;
import ai.vespa.validation.PatternedStringWrapper;
import java.util.regex.Pattern;
import static ai.vespa.validation.Validation.requireLength;
import static ai.vespa.validation.Validation.requireMatch;
/**
* A valid domain name, which can be used in a {@link java.net.URI}.
*
* @author jonmv
*/
public class DomainName extends PatternedStringWrapper<DomainName> {
protected static final Pattern labelPattern = Pattern.compile("([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])");
protected static final Pattern domainNamePattern = Pattern.compile("(" + labelPattern + "\\.)*" + labelPattern + "\\.?");
public static final DomainName localhost = DomainName.of("localhost");
protected DomainName(String value, String description) {
super(requireLength(value, "domain name length", 1, 255), domainNamePattern, description);
}
public static DomainName of(String value) {
return new DomainName(value, "domain name");
}
public static String requireLabel(String label) {
return requireMatch(label, "domain name label", labelPattern);
}
public String leafLabel() {
int offset = value().lastIndexOf('.');
return offset == -1 ? value() : value().substring(0, offset);
}
}
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