org.jvnet.mimepull.DataFile Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of mimepull Show documentation
Show all versions of mimepull Show documentation
Provides a streaming API to access attachments parts in a MIME message.
/*
* 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.io.*;
/**
* Use {@link RandomAccessFile} for concurrent access of read
* and write partial part's content.
*
* @author Kohsuke Kawaguchi
* @author Jitendra Kotamraju
*/
final class DataFile {
private WeakDataFile weak;
private long writePointer;
DataFile(File file) {
writePointer=0;
weak = new WeakDataFile(this, file);
}
/**
*
*/
void close() {
weak.close();
}
/**
* Read data from the given file pointer position.
*
* @param pointer read position
* @param buf that needs to be filled
* @param offset the start offset of the data.
* @param length of data that needs to be read
*/
synchronized void read(long pointer, byte[] buf, int offset, int length ) {
weak.read(pointer, buf, offset, length);
}
void renameTo(File f) {
weak.renameTo(f);
}
/**
* Write data to the file
*
* @param data that needs to written to a file
* @param offset start offset in the data
* @param length no bytes to write
* @return file pointer before the write operation(or at which the
* data is written)
*/
synchronized long writeTo(byte[] data, int offset, int length) {
long temp = writePointer;
writePointer = weak.writeTo(writePointer, data, offset, length);
return temp;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy