/* -*- 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;
    }
}