/*
* Copyright (C) 2013 Cumulocity GmbH
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package com.cumulocity.me.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.microedition.io.Connection;
import com.cumulocity.me.logger.Log;
import com.cumulocity.me.sdk.SDKException;
public abstract class IOUtils {
private static final Log LOG = Log.getInstance();
public static final int BUFF_SIZE = 2048;
protected IOUtils() {
}
public static final void closeQuietly(InputStream is) {
if (is == null) {
return;
}
try {
is.close();
} catch (IOException e) {
IOUtils.LOG.debug(e.getMessage());
}
}
public static final void closeQuietly(Connection connection) {
if (connection == null) {
return;
}
try {
connection.close();
} catch (IOException e) {
LOG.debug(e.getMessage());
}
}
public static final byte[] readData(int inputLength, InputStream inputStream) {
if (inputLength < 0 || inputStream == null) {
return null;
}
final int maxNumberOfAttempts = 10;
final int nextAttemptTimeout = 500;
int bytesCount = 0;
int consecutiveFailedAttemptsCount = 0;
try {
byte[] data = new byte[inputLength];
int len = BUFF_SIZE;
int read = 0;
do {
do {
if (len > (inputLength - bytesCount)) {
len = (inputLength - bytesCount);
}
read = inputStream.read(data, bytesCount, len);
if (read > 0) {
consecutiveFailedAttemptsCount = 0;
bytesCount += read;
}
} while (read == len && bytesCount < inputLength);
if (bytesCount < inputLength && consecutiveFailedAttemptsCount < maxNumberOfAttempts) {
consecutiveFailedAttemptsCount++;
Thread.sleep(nextAttemptTimeout);
} else {
break;
}
} while (true);
return data;
} catch (IOException e) {
throw new SDKException("I/O error!", e);
} catch (InterruptedException e) {
throw new SDKException("Interrupted!", e);
} finally {
if (bytesCount < inputLength) {
throw new SDKException("Received only " + bytesCount + " of " + inputLength + " expected bytes!");
}
}
}
public static final void writeData(byte[] input, OutputStream output) {
if (input == null) {
return;
}
try {
output.write(input);
} catch (IOException e) {
throw new SDKException("I/O error!", e);
}
}
}