/**
* BlueCove - Java library for Bluetooth
* Copyright (C) 2007-2009 Vlad Skarzhevskyy
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* @version $Id$
*/
package com.intel.bluetooth.obex;
import java.io.IOException;
import java.io.InputStream;
class OBEXOperationInputStream extends InputStream {
private final OBEXOperation operation;
OBEXOperationInputStream(OBEXOperation op) {
this.operation = op;
}
private byte[] buffer = new byte[0x100];
private int readPos = 0;
private int appendPos = 0;
private Object lock = new Object();
private boolean isClosed = false;
private boolean eofReceived = false;
/*
* (non-Javadoc)
*
* @see java.io.InputStream#read()
*/
public int read() throws IOException {
if (isClosed) {
throw new IOException("Stream closed");
}
if (this.operation.isClosed() && (appendPos == readPos)) {
return -1;
}
synchronized (lock) {
while (!eofReceived && (this.operation instanceof OBEXOperationReceive) && !isClosed
&& (!this.operation.isClosed()) && (appendPos == readPos)) {
((OBEXOperationReceive) this.operation).receiveData(this);
}
if (appendPos == readPos) {
return -1;
}
return buffer[readPos++] & 0xFF;
}
}
/*
* (non-Javadoc)
*
* @see java.io.InputStream#available()
*/
public int available() throws IOException {
synchronized (lock) {
return (appendPos - readPos);
}
}
/*
* (non-Javadoc)
*
* @see java.io.InputStream#close()
*/
public void close() throws IOException {
isClosed = true;
synchronized (lock) {
lock.notifyAll();
}
}
void appendData(byte[] b, boolean eof) {
if (isClosed || eofReceived) {
return;
}
synchronized (lock) {
if (eof) {
eofReceived = true;
}
if ((b != null) && (b.length != 0)) {
if (appendPos + b.length > buffer.length) {
int newSize = (b.length + (appendPos - readPos)) * 2;
if (newSize < buffer.length) {
newSize = buffer.length;
}
byte[] newBuffer = new byte[newSize];
System.arraycopy(buffer, readPos, newBuffer, 0, appendPos - readPos);
buffer = newBuffer;
appendPos -= readPos;
readPos = 0;
}
System.arraycopy(b, 0, buffer, appendPos, b.length);
appendPos += b.length;
}
lock.notifyAll();
}
}
}