gecko/mobile/android/base/sqlite/ByteBufferInputStream.java

72 lines
2.6 KiB
Java

/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Android code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011-2012
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Gian-Carlo Pascutto <gpascutto@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.gecko.sqlite;
import java.io.BufferedInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
/*
* Helper class to make the ByteBuffers returned by SQLite BLOB
* easier to use.
*/
public class ByteBufferInputStream extends InputStream {
private ByteBuffer mByteBuffer;
public ByteBufferInputStream(ByteBuffer aByteBuffer) {
mByteBuffer = aByteBuffer;
}
@Override
public synchronized int read() throws IOException {
if (!mByteBuffer.hasRemaining()) {
return -1;
}
return mByteBuffer.get();
}
@Override
public synchronized int read(byte[] aBytes, int aOffset, int aLen)
throws IOException {
int toRead = Math.min(aLen, mByteBuffer.remaining());
mByteBuffer.get(aBytes, aOffset, toRead);
return toRead;
}
}