com.sun.jersey.core.util.Closing Maven / Gradle / Ivy

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A bundle containing code of all jar-based modules that provide JAX-RS and Jersey-related features. Such a bundle is *only intended* for developers that do not use Maven's dependency system. The bundle does not include code for contributes, tests and samples.

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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 */
package com.sun.jersey.core.util;

import java.io.IOException;
import java.io.InputStream;

/**
 * A helper class to aid the closing of {@link InputStream}.
 * 
 * @author [email protected]
 */
public class Closing {

    public static interface Closure {
        public void f(InputStream in) throws IOException;
    }

    public static Closing with(final InputStream in) {
        return new Closing(in);
    }
    
    private final InputStream in;

    public Closing(final InputStream in) {
        this.in = in;
    }

    public void f(final Closure c) throws IOException {
        if (in == null) {
            return;
        }
        try {
            c.f(in);
        } finally {
            try {
                in.close();
            } catch (IOException ex) {
                throw ex;
            }
        }
    }
}