CloseableConsumerAdapter.java

/*
 * 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.commons.compress.archivers.examples;

import java.io.Closeable;
import java.io.IOException;
import java.util.Objects;

final class CloseableConsumerAdapter implements Closeable {
    private final CloseableConsumer consumer;
    private Closeable closeable;

    CloseableConsumerAdapter(final CloseableConsumer consumer) {
        this.consumer = Objects.requireNonNull(consumer, "consumer");
    }

    @Override
    public void close() throws IOException {
        if (closeable != null) {
            consumer.accept(closeable);
        }
    }

    <C extends Closeable> C track(final C closeable) {
        this.closeable = closeable;
        return closeable;
    }
}