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LangString.java
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LangString.java
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/**
* Copyright (C) 2022 Czech Technical University in Prague
* <p>
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
* <p>
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.ontodriver.model;
import java.io.Serializable;
import java.util.Objects;
import java.util.Optional;
/**
* Represents a string value with a (optional) language tag.
*/
public final class LangString implements Serializable {
private final String value;
private final String language;
/**
* Explicit no-arg constructor allowing deserialization from JSON.
*/
private LangString() {
this.value = null;
this.language = null;
}
public LangString(String value) {
this.value = Objects.requireNonNull(value);
this.language = null;
}
public LangString(String value, String language) {
this.value = Objects.requireNonNull(value);
this.language = language;
}
/**
* Gets the lexical value of this string.
*
* @return Lexical value
*/
public String getValue() {
return value;
}
/**
* Gets the language tag (if present).
*
* @return Optional language tag value
*/
public Optional<String> getLanguage() {
return Optional.ofNullable(language);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof LangString)) {
return false;
}
LangString that = (LangString) o;
return Objects.equals(value, that.value) && Objects.equals(language, that.language);
}
@Override
public int hashCode() {
return Objects.hash(value, language);
}
@Override
public String toString() {
return language != null ? "\"" + value + "\"@" + language : "\"" + value + '"';
}
}