org.minidns.util.MultipleIoException Maven / Gradle / Ivy
/*
* Copyright 2015-2020 the original author or authors
*
* This software is licensed under the Apache License, Version 2.0,
* the GNU Lesser General Public License version 2 or later ("LGPL")
* and the WTFPL.
* You may choose either license to govern your use of this software only
* upon the condition that you accept all of the terms of either
* the Apache License 2.0, the LGPL 2.1+ or the WTFPL.
*/
package org.minidns.util;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
public final class MultipleIoException extends IOException {
/**
*
*/
private static final long serialVersionUID = -5932211337552319515L;
private final List ioExceptions;
private MultipleIoException(List ioExceptions) {
super(getMessage(ioExceptions));
assert !ioExceptions.isEmpty();
this.ioExceptions = Collections.unmodifiableList(ioExceptions);
}
public List getExceptions() {
return ioExceptions;
}
private static String getMessage(Collection exceptions) {
StringBuilder sb = new StringBuilder();
Iterator it = exceptions.iterator();
while (it.hasNext()) {
sb.append(it.next().getMessage());
if (it.hasNext()) {
sb.append(", ");
}
}
return sb.toString();
}
public static void throwIfRequired(List ioExceptions) throws IOException {
if (ioExceptions == null || ioExceptions.isEmpty()) {
return;
}
if (ioExceptions.size() == 1) {
throw ioExceptions.get(0);
}
throw new MultipleIoException(ioExceptions);
}
public static IOException toIOException(List ioExceptions) {
int size = ioExceptions.size();
if (size == 1) {
return ioExceptions.get(0);
} else if (size > 1) {
return new MultipleIoException(ioExceptions);
}
return null;
}
}