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A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

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/*
 * Copyright (c) 2012, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.message.internal;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.concurrent.atomic.AtomicReference;

/**
 * Utility class.
 *
 * @author Jakub Podlesak
 */
public final class Utils {

    /**
     * Throws an IllegalArgumentException with given error message if the first, toCheck,
     * parameter is {@code null}.
     *
     * @param toCheck an instance to check.
     * @param errorMessage message to set to the IllegalArgumentException thrown.
     */
    static void throwIllegalArgumentExceptionIfNull(final Object toCheck, final String errorMessage) {
        if (toCheck == null) {
            throw new IllegalArgumentException(errorMessage);
        }
    }

    /**
     * Create an empty file in the default temporary-file directory.
     *
     * @return An abstract pathname denoting a newly-created empty file.
     * @throws IOException if a file could not be created.
     */
    public static File createTempFile() throws IOException {
        final AtomicReference exceptionReference = new AtomicReference<>();
        final File file = AccessController.doPrivileged(new PrivilegedAction() {
            public File run() {
                File tempFile = null;
                try {
                    tempFile = Files.createTempFile("rep", "tmp").toFile();
                    // Make sure the file is deleted when JVM is shutdown at last.
                    tempFile.deleteOnExit();
                } catch (IOException e) {
                    exceptionReference.set(e);
                }
                return tempFile;
            }
        });
        if (exceptionReference.get() != null) {
            throw exceptionReference.get();
        }
        return file;
    }

    /**
     * Prevent instantiation.
     */
    private Utils() {
        throw new AssertionError("No instances allowed.");
    }
}