package org.geogebra.desktop.main;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.geogebra.common.util.Charsets;
/**
* An OutputStream that writes contents to a Logger upon each call to flush()
*
* http://blogs.sun.com/nickstephen/entry/java_redirecting_system_out_and
*/
class LoggingOutputStream extends ByteArrayOutputStream {
private String lineSeparator;
private Logger logger;
private Level level;
/**
* Constructor
*
* @param logger
* Logger to write to
* @param level
* Level at which to write the log message
*/
public LoggingOutputStream(Logger logger, Level level) {
super();
this.logger = logger;
this.level = level;
lineSeparator = System.getProperty("line.separator");
}
/**
* upon flush() write the existing contents of the OutputStream to the
* logger as a log record.
*
* @throws java.io.IOException
* in case of error
*/
@Override
public void flush() throws IOException {
String record;
synchronized (this) {
super.flush();
record = this.toString(Charsets.UTF_8);
super.reset();
if (record.length() == 0 || record.equals(lineSeparator)) {
// avoid empty records
return;
}
logger.logp(level, "", "", record);
}
}
}