ImmutableLateInit.java
/**
* Copyright (c) 2023, RTE (http://www.rte-france.com/)
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
* SPDX-License-Identifier: MPL-2.0
*/
package com.powsybl.dynawo.models.utils;
import com.powsybl.commons.PowsyblException;
import java.util.Objects;
/**
* @author Laurent Issertial {@literal <laurent.issertial at rte-france.com>}
*/
public class ImmutableLateInit<T> {
private T value = null;
public final T getValue() {
if (value == null) {
throw new PowsyblException("Field has not been initialized");
}
return value;
}
public final void setValue(T value) {
if (this.value != null) {
throw new PowsyblException("Field has already been initialized");
}
this.value = Objects.requireNonNull(value);
}
}