de.rwhq.serializer.FixedStringSerializer.java Source code

Introduction

Here is the source code for de.rwhq.serializer.FixedStringSerializer.java

Source

/*
 * This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License:
 *
 * http://creativecommons.org/licenses/by-nc/3.0/
 *
 * For alternative conditions contact the author.
 *
 * Copyright (c) 2011 "Robin Wenglewski <robin@wenglewski.de>"
 */
package de.rwhq.serializer;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.nio.ByteBuffer;

public enum FixedStringSerializer implements FixLengthSerializer<String, byte[]> {
    INSTANCE(100), INSTANCE_10(10), INSTANCE_100(100), INSTANCE_1000(1000);

    private int length;

    private static Log LOG = LogFactory.getLog(FixedStringSerializer.class);

    private FixedStringSerializer(final int length) {
        this.length = length;
    }

    /* (non-Javadoc)
     * @see Serializer#serialize(java.lang.Object)
     */
    @Override
    public byte[] serialize(final String o) {
        final byte[] bytes = o.getBytes();

        if (bytes.length > (length - 1)) {
            throw new IllegalArgumentException("String is too long to be serialized");
        }

        final ByteBuffer buf = ByteBuffer.allocate(length);
        buf.putShort((short) bytes.length);
        buf.put(bytes);
        return buf.array();
    }

    /* (non-Javadoc)
     * @see com.rwhq.serializer.Serializer#deserialize(java.lang.Object)
     */
    @Override
    public String deserialize(final byte[] o) {
        final ByteBuffer buf = ByteBuffer.wrap(o);
        final short length = buf.getShort();

        final byte[] bytes = new byte[length];
        buf.get(bytes);
        return new String(bytes);
    }

    /* (non-Javadoc)
     * @see com.rwhq.serializer.FixLengthSerializer#getSerializedLength()
     */
    @Override
    public int getSerializedLength() {
        return length;
    }

}