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/*
* Copyright (c) 2008-2009, Motorola, Inc.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of the Motorola, Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package javax.obex;
import java.io.IOException;
import java.io.OutputStream;
import java.io.ByteArrayOutputStream;
/**
* This object provides an output stream to the Operation objects used in this
* package.
* @hide
*/
public final class PrivateOutputStream extends OutputStream {
private BaseStream mParent;
private ByteArrayOutputStream mArray;
private boolean mOpen;
private int mMaxPacketSize;
/**
* Creates an empty <code>PrivateOutputStream</code> to write to.
* @param p the connection that this stream runs over
*/
public PrivateOutputStream(BaseStream p, int maxSize) {
mParent = p;
mArray = new ByteArrayOutputStream();
mMaxPacketSize = maxSize;
mOpen = true;
}
/**
* Determines how many bytes have been written to the output stream.
* @return the number of bytes written to the output stream
*/
public int size() {
return mArray.size();
}
/**
* Writes the specified byte to this output stream. The general contract for
* write is that one byte is written to the output stream. The byte to be
* written is the eight low-order bits of the argument b. The 24 high-order
* bits of b are ignored.
* @param b the byte to write
* @throws IOException if an I/O error occurs
*/
@Override
public synchronized void write(int b) throws IOException {
ensureOpen();
mParent.ensureNotDone();
mArray.write(b);
if (mArray.size() == mMaxPacketSize) {
mParent.continueOperation(true, false);
}
}
@Override
public void write(byte[] buffer) throws IOException {
write(buffer, 0, buffer.length);
}
@Override
public synchronized void write(byte[] buffer, int offset, int count) throws IOException {
int offset1 = offset;
int remainLength = count;
if (buffer == null) {
throw new IOException("buffer is null");
}
if ((offset | count) < 0 || count > buffer.length - offset) {
throw new IndexOutOfBoundsException("index outof bound");
}
ensureOpen();
mParent.ensureNotDone();
while ((mArray.size() + remainLength) >= mMaxPacketSize) {
int bufferLeft = mMaxPacketSize - mArray.size();
mArray.write(buffer, offset1, bufferLeft);
offset1 += bufferLeft;
remainLength -= bufferLeft;
mParent.continueOperation(true, false);
}
if (remainLength > 0) {
mArray.write(buffer, offset1, remainLength);
}
}
/**
* Reads the bytes that have been written to this stream.
* @param size the size of the array to return
* @return the byte array that is written
*/
public synchronized byte[] readBytes(int size) {
if (mArray.size() > 0) {
byte[] temp = mArray.toByteArray();
mArray.reset();
byte[] result = new byte[size];
System.arraycopy(temp, 0, result, 0, size);
if (temp.length != size) {
mArray.write(temp, size, temp.length - size);
}
return result;
} else {
return null;
}
}
/**
* Verifies that this stream is open
* @throws IOException if the stream is not open
*/
private void ensureOpen() throws IOException {
mParent.ensureOpen();
if (!mOpen) {
throw new IOException("Output stream is closed");
}
}
/**
* Closes the output stream. If the input stream is already closed, do
* nothing.
* @throws IOException this will never happen
*/
@Override
public void close() throws IOException {
mOpen = false;
mParent.streamClosed(false);
}
/**
* Determines if the connection is closed
* @return <code>true</code> if the connection is closed; <code>false</code>
* if the connection is open
*/
public boolean isClosed() {
return !mOpen;
}
}
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