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products/sources/formale Sprachen/Java/Openjdk/test/jdk/java/util/Collections/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 3 kB

Quellcode-Bibliothek Ser.java Sprache: JAVA

/*
* Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/*
* @test
* @bug 4190323
* @summary EMPTY_SET, EMPTY_LIST, and the collections returned by
*          nCopies and singleton were spec'd to be serializable, but weren't.
*/

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Collections;
import java.util.List;
import java.util.Set;

public class Ser {
    public static void main(String[] args) throws Exception {

        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ObjectOutputStream out = new ObjectOutputStream(bos);
            out.writeObject(Collections.EMPTY_SET);
            out.flush();
            ObjectInputStream in = new ObjectInputStream(
                    new ByteArrayInputStream(bos.toByteArray()));

            if (!Collections.EMPTY_SET.equals(in.readObject()))
                throw new RuntimeException("empty set Ser/Deser failure.");
        } catch (Exception e) {
            throw new RuntimeException("Failed to serialize empty set:" + e);
        }

        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ObjectOutputStream out = new ObjectOutputStream(bos);
            out.writeObject(Collections.EMPTY_LIST);
            out.flush();
            ObjectInputStream in = new ObjectInputStream(
                    new ByteArrayInputStream(bos.toByteArray()));

            if (!Collections.EMPTY_LIST.equals(in.readObject()))
                throw new RuntimeException("empty list Ser/Deser failure.");
        } catch (Exception e) {
            throw new RuntimeException("Failed to serialize empty list:" + e);
        }

        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ObjectOutputStream out = new ObjectOutputStream(bos);
            Set gumby = Collections.singleton("gumby");
            out.writeObject(gumby);
            out.flush();
            ObjectInputStream in = new ObjectInputStream(
                    new ByteArrayInputStream(bos.toByteArray()));

            if (!gumby.equals(in.readObject()))
                throw new RuntimeException("Singleton Ser/Deser failure.");
        } catch (Exception e) {
            throw new RuntimeException("Failed to serialize singleton:" + e);
        }

        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ObjectOutputStream out = new ObjectOutputStream(bos);
            List gumbies = Collections.nCopies(50, "gumby");
            out.writeObject(gumbies);
            out.flush();
            ObjectInputStream in = new ObjectInputStream(
                    new ByteArrayInputStream(bos.toByteArray()));

            if (!gumbies.equals(in.readObject()))
                throw new RuntimeException("nCopies Ser/Deser failure.");
        } catch (Exception e) {
            throw new RuntimeException("Failed to serialize nCopies:" + e);
        }
    }
}

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