org.mycore.common.function.MCRThrowableTask Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe 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.
*
* MyCoRe 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 MyCoRe. If not, see .
*/
package org.mycore.common.function;
import java.util.Objects;
@FunctionalInterface
public interface MCRThrowableTask {
void run() throws T;
/**
* Returns a composed task that first runs the {@code before}
* task, and then runs this task.
* If evaluation of either function throws an exception, it is relayed to
* the caller of the composed function.
*
* @param before the function to apply before this function is applied
* @return a composed function that first applies the {@code before}
* function and then applies this function
* @throws NullPointerException if before is null
*
* @see #andThen(MCRThrowableTask)
*/
default MCRThrowableTask compose(MCRThrowableTask before) {
Objects.requireNonNull(before);
return () -> {
before.run();
run();
};
}
/**
* Returns a composed task that first this task, and then runs the {@code after} task.
* If evaluation of either function throws an exception, it is relayed to
* the caller of the composed function.
*
* @param after the function to apply after this function is applied
* @return a composed task that first runs this task and then
* the {@code after} task
* @throws NullPointerException if after is null
*
* @see #compose(MCRThrowableTask)
*/
default MCRThrowableTask andThen(MCRThrowableTask after) {
Objects.requireNonNull(after);
return () -> {
run();
after.run();
};
}
}