/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.drill.common;
import java.util.Arrays;
import java.util.Collection;
/**
* Utilities for AutoCloseable classes.
*/
public class AutoCloseables {
public static AutoCloseable all(final Collection<? extends AutoCloseable> autoCloseables) {
return new AutoCloseable() {
@Override
public void close() throws Exception {
AutoCloseables.close(autoCloseables);
}
};
}
/**
* Closes all autoCloseables if not null and suppresses exceptions by adding them to t
* @param t the throwable to add suppressed exception to
* @param autoCloseables the closeables to close
*/
public static void close(Throwable t, AutoCloseable... autoCloseables) {
close(t, Arrays.asList(autoCloseables));
}
/**
* Closes all autoCloseables if not null and suppresses exceptions by adding them to t
* @param t the throwable to add suppressed exception to
* @param autoCloseables the closeables to close
*/
public static void close(Throwable t, Collection<? extends AutoCloseable> autoCloseables) {
try {
close(autoCloseables);
} catch (Exception e) {
t.addSuppressed(e);
}
}
/**
* Closes all autoCloseables if not null and suppresses subsequent exceptions if more than one
* @param autoCloseables the closeables to close
*/
public static void close(AutoCloseable... autoCloseables) throws Exception {
close(Arrays.asList(autoCloseables));
}
/**
* Closes all autoCloseables if not null and suppresses subsequent exceptions if more than one
* @param autoCloseables the closeables to close
*/
public static void close(Iterable<? extends AutoCloseable> ac) throws Exception {
Exception topLevelException = null;
for (AutoCloseable closeable : ac) {
try {
if (closeable != null) {
closeable.close();
}
} catch (Exception e) {
if (topLevelException == null) {
topLevelException = e;
} else {
topLevelException.addSuppressed(e);
}
}
}
if (topLevelException != null) {
throw topLevelException;
}
}
}