com.hazelcast.org.apache.calcite.util.Closer Maven / Gradle / Ivy
/*
* 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 com.hazelcast.org.apache.calcite.util;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/** Helper that holds onto {@link AutoCloseable} resources and releases them
* when its {@code #close} method is called.
*
* Similar to {@code com.hazelcast.com.google.common.io.Closer} but can deal with
* {@link AutoCloseable}, and doesn't throw {@link IOException}. */
public final class Closer implements AutoCloseable {
private final List list = new ArrayList<>();
/** Registers a resource. */
public E add(E e) {
list.add(e);
return e;
}
@Override public void close() {
for (AutoCloseable closeable : list) {
try {
closeable.close();
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
}
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