michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.sqlite;
michael@0: 
michael@0: import java.io.IOException;
michael@0: import java.io.InputStream;
michael@0: import java.nio.ByteBuffer;
michael@0: 
michael@0: /*
michael@0:  * Helper class to make the ByteBuffers returned by SQLite BLOB
michael@0:  * easier to use.
michael@0:  */
michael@0: public class ByteBufferInputStream extends InputStream {
michael@0:     private ByteBuffer mByteBuffer;
michael@0: 
michael@0:     public ByteBufferInputStream(ByteBuffer aByteBuffer) {
michael@0:         mByteBuffer = aByteBuffer;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public synchronized int read() throws IOException {
michael@0:         if (!mByteBuffer.hasRemaining()) {
michael@0:             return -1;
michael@0:         }
michael@0:         return mByteBuffer.get();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public synchronized int read(byte[] aBytes, int aOffset, int aLen)
michael@0:         throws IOException {
michael@0:         int toRead = Math.min(aLen, mByteBuffer.remaining());
michael@0:         mByteBuffer.get(aBytes, aOffset, toRead);
michael@0:         return toRead;
michael@0:     }
michael@0: }