/**
* Enables logging for given logger name and given severity. Everything logged to the object is
* going to go to the returned CharSequence object which can be used to check the content or
* converted <code>toString</code>.
*
* <p>The logging stops when the returned object is garbage collected.
*
* @param loggerName the name to capture logging for
* @param level the level of details one wants to get
* @return character sequence which can be check or converted to string
* @since 1.27
*/
public static CharSequence enable(String loggerName, Level level) {
IL il = new IL(false);
class MyPs extends PrintStream implements CharSequence {
private ByteArrayOutputStream os;
public MyPs() {
this(new ByteArrayOutputStream());
}
private MyPs(ByteArrayOutputStream arr) {
super(arr);
os = arr;
}
public int length() {
return toString().length();
}
public char charAt(int index) {
return toString().charAt(index);
}
public CharSequence subSequence(int start, int end) {
return toString().subSequence(start, end);
}
@Override
public String toString() {
return os.toString();
}
}
Logger l = Logger.getLogger(loggerName);
if (l.getLevel() == null || l.getLevel().intValue() > level.intValue()) {
l.setLevel(level);
}
MyPs ps = new MyPs();
Log log = new Log(l, ps);
log.setLevel(level);
l.addHandler(log);
return ps;
}
