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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.validation;
import static java.util.Objects.requireNonNull;
/**
* Abstract wrapper for glorified strings, to ease adding new such wrappers.
* <p>
* <br>
* What's in a name?<br>
* That which we call a String<br>
* by any other name would smell as foul.<br>
* No? 'Tis not sooth?<br>
* No ... I see it now!<br>
* Baptiz'd a-new, the String—<br>
* no more a String,<br>
* no less a {@link #value}—<br>
* it bringeth counsel<br>
* and is proof against their enmity.<br>
* </p>
* @param <T> child type
*
* @author jonmv
*/
public abstract class StringWrapper<T extends StringWrapper<T>> implements Comparable<T> {
private final String value;
protected StringWrapper(String value) {
this.value = requireNonNull(value);
}
public final String value() { return value; }
@Override
public int compareTo(T other) {
return value().compareTo(other.value());
}
@Override
public final boolean equals(Object o) {
return this
==
( o) || (o ) instanceof StringWrapper
< ?>
w && ( value.equals(w.value));
}
@Override
public final int hashCode() {
return value.hashCode();
}
@Override
public String toString() {
return value;
}
}
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