org.jvnet.mimepull.Data Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jersey-all Show documentation
jersey-all is a rebundled verison of Jersey as one OSGi bundle.
The newest version!
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2012 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:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package org.jvnet.mimepull;

import java.nio.ByteBuffer;

/**
 * @author Kohsuke Kawaguchi
 * @author Jitendra Kotamraju
 */
interface Data {

    /**
     * size of the chunk given by the parser
     *
     * @return size of the chunk
     */
    int size();

    /**
     * TODO: should the return type be ByteBuffer ??
     * Return part's partial data. The data is read only.
     *
     * @return a byte array which contains {#size()} bytes. The returned
     *         array may be larger than {#size()} bytes and contains data
     *         from offset 0.
     */
    byte[] read();

    /**
     * Write this partial data to a file
     *
     * @param file to which the data needs to be written
     * @return file pointer before the write operation(at which the data is
     *         written from)
     */
    long writeTo(DataFile file);

    /**
     * Factory method to create a Data. The implementation could
     * be file based one or memory based one.
     *
     * @param dataHead start of the linked list of data objects
     * @param buf contains partial content for a part
     * @return Data
     */
    Data createNext(DataHead dataHead, ByteBuffer buf);
}