question: public boolean rejectByDefault ( String className ) { if ( className == null ) { return true ; } if ( className . startsWith ( "net.sf.profiler4j.test." ) ) { return false ; } if ( className . startsWith ( "[" ) || className . startsWith ( "net.sf.profiler4j.agent." ) || className . startsWith ( "java.util." ) || className . startsWith ( "java.lang." ) || className . startsWith ( "java.lang.Thread" ) || className . startsWith ( "java.lang.reflect." ) || className . startsWith ( "java.lang.ref." ) || className . equals ( "com.sun.tools.javac.util.DefaultFileManager" ) || className . startsWith ( "sun.security." ) || className . startsWith ( "java.security.MessageDigest$" ) || className . startsWith ( "sun.reflect." ) || className . startsWith ( "$Proxy" ) || className . contains ( "ByCGLIB$$" ) ) { return true ; } if ( config . getExclusions ( ) != null ) { for ( String cn : config . getExclusions ( ) ) { if ( className . startsWith ( cn ) ) { return true ; } } } return false ; }
target:  Checks whether a class should be simply ignored by the profiler in every possible situation.