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// SPDX-License-Identifier: Apache-2.0
/*
* extended-functions
* Copyright 2021-2024 Marko Zajc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.eu.zajc.ef.supplier.except;
import static org.eu.zajc.ef.Utilities.asUnchecked;
import java.util.concurrent.Callable;
import java.util.function.Supplier;
/**
* Represents a supplier of results.
*
*
* This is equivalent to {@link Callable} when {@code E} is {@link Exception}.
*
*
* Additionally, the functional method is allowed to throw a generic
* {@link Throwable} of type {@code E}.
*
*
* There is no requirement that a new or distinct result be returned each time the
* supplier is invoked.
*
*
* This is a functional interface whose functional method is {@link #getChecked()}.
*
* @param
* the type of results supplied by this supplier
* @param
* {@link Throwable} type
*
* @see Supplier
*
* @author Marko Zajc
*/
@FunctionalInterface
public interface ESupplier extends Supplier, Callable {
@Override
default T get() {
try {
return getChecked();
} catch (Throwable e) { // NOSONAR can't catch generic exceptions
throw asUnchecked(e);
}
}
@Override
default T call() throws Exception {
try {
return getChecked();
} catch (Throwable e) { // NOSONAR can't catch generic exceptions
throw asUnchecked(e);
}
}
/**
* Same as {@link #get()}, but throws a checked exception.
*
* @return a result
*
* @throws E
* the defined exception type
*/
T getChecked() throws E;
}