question: private boolean matches ( @ Nullable Object obj , String operator , String operandStr ) { ObsValue value ; if ( obj == null ) { switch ( operator ) { case "" : case "=" : case "==" : return operandStr . isEmpty ( ) ; default : return false ; } } else if ( obj instanceof ObsPoint ) { value = ( ( ObsPoint ) obj ) . value ; } else if ( obj instanceof ObsValue ) { value = ( ObsValue ) obj ; } else return false ; ObsValue operand = null ; if ( value . uuid != null ) { operand = ObsValue . newCoded ( Utils . expandUuid ( operandStr ) ) ; } else if ( value . number != null ) { try { operand = ObsValue . newNumber ( Double . valueOf ( operandStr ) ) ; } catch ( NumberFormatException e ) { operand = ObsValue . ZERO ; } } else if ( value . text != null ) { operand = ObsValue . newText ( operandStr ) ; } else if ( value . date != null ) { try { operand = ObsValue . newDate ( LocalDate . parse ( operandStr ) ) ; } catch ( IllegalArgumentException e ) { operand = ObsValue . MIN_DATE ; } } else if ( value . instant != null ) { try { operand = ObsValue . newTime ( Long . valueOf ( operandStr ) ) ; } catch ( IllegalArgumentException e ) { operand = ObsValue . MIN_TIME ; } } switch ( operator ) { case "" : case "=" : case "==" : return Objects . equal ( value . uuid , operand . uuid ) ; case "<" : return value . compareTo ( operand ) < 0 ; case "<=" : return value . compareTo ( operand ) <= 0 ; case ">" : return value . compareTo ( operand ) > 0 ; case ">=" : return value . compareTo ( operand ) >= 0 ; } return false ; }
target:  Returns true if an observed value matches the given condition. 