org.spout.api.datatable.SerializableData.java Source code

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Here is the source code for org.spout.api.datatable.SerializableData.java

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/*
 * This file is part of SpoutAPI.
 *
 * Copyright (c) 2011-2012, SpoutDev <http://www.spout.org/>
 * SpoutAPI is licensed under the SpoutDev License Version 1.
 *
 * SpoutAPI is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * In addition, 180 days after any changes are published, you can use the
 * software, incorporating those changes, under the terms of the MIT license,
 * as described in the SpoutDev License Version 1.
 *
 * SpoutAPI 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License,
 * the MIT license and the SpoutDev License Version 1 along with this program.
 * If not, see <http://www.gnu.org/licenses/> for the GNU Lesser General Public
 * License and see <http://www.spout.org/SpoutDevLicenseV1.txt> for the full license,
 * including the MIT license.
 */
package org.spout.api.datatable;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.logging.Level;

import org.apache.commons.io.IOUtils;
import org.spout.api.Spout;

public class SerializableData extends AbstractData {

    public SerializableData(int key) {
        super(key);
    }

    public SerializableData(int key, Serializable data) {
        super(key, data);
    }

    @Override
    public byte[] compress() {
        Serializable value = super.get();
        if (value instanceof ByteArrayWrapper) {
            return ((ByteArrayWrapper) value).getArray();
        }

        ByteArrayOutputStream byteOut = new ByteArrayOutputStream();

        try {
            ObjectOutputStream objOut = new ObjectOutputStream(byteOut);

            objOut.writeObject(super.get());
            objOut.flush();
            objOut.close();
        } catch (IOException e) {
            if (Spout.debugMode()) {
                Spout.getLogger().log(Level.SEVERE, "Unable to serialize " + value + " (type: "
                        + (value != null ? value.getClass().getSimpleName() : "null") + ")", e);
            }
            return null;
        }

        return byteOut.toByteArray();
    }

    @Override
    public void decompress(byte[] compressed) {
        super.set(new ByteArrayWrapper(compressed));
    }

    @Override
    public Serializable get() {
        while (true) {
            Serializable s = super.get();
            if (!(s instanceof ByteArrayWrapper)) {
                return super.get();
            }
            try {
                ByteArrayWrapper w = (ByteArrayWrapper) s;
                ObjectInputStream stream = new ObjectInputStream(new ByteArrayInputStream(w.getArray()));
                Object result;
                try {
                    result = stream.readObject();
                } finally {
                    IOUtils.closeQuietly(stream);
                }
                Serializable deserialized = (Serializable) result;
                if (data.compareAndSet(s, deserialized)) {
                    return deserialized;
                }
            } catch (IOException e) {
                return null;
            } catch (ClassNotFoundException e) {
                return null;
            } catch (ClassCastException e) {
                return null;
            }
        }
    }

    @Override
    public byte getObjectTypeId() {
        return 4;
    }

    @Override
    public AbstractData newInstance(int key) {
        return new SerializableData(key);
    }

    public boolean isUnknownClass() {
        Serializable s = super.get();
        if (s == null) {
            return false;
        }

        return s instanceof ByteArrayWrapper;
    }

    private static class ByteArrayWrapper implements Serializable {
        private static final long serialVersionUID = 1L;

        private final byte[] array;

        public ByteArrayWrapper(byte[] array) {
            this.array = array;
        }

        public byte[] getArray() {
            return array;
        }
    }

    @Override
    public int fixedLength() {
        return -1;
    }

}