| Interface | Description | 
|---|---|
| Counter |  
          
           Interface that can be implemented if you want to count the number of documents that are being processed by iText. 
            |  
       
| Logger |  
          
           Logger interface   LoggerFactory.setLogger(Logger). 
          |  
       
| Class | Description | 
|---|---|
| CounterFactory |  
          
           Factory that creates a counter for every reader or writer class. 
            |  
       
| DefaultCounter |  
          
           Implementation of the Counter interface that doesn't do anything. 
            |  
       
| LoggerFactory |  
          
           LoggerFactory can be used to set a logger. 
            |  
       
| NoOpCounter |  
          
           Implementation of the Counter interface that doesn't do anything. 
            |  
       
| NoOpLogger |  
          
           The no-operation logger, it does nothing with the received logging statements. 
            |  
       
| SysoCounter | |
| SysoLogger |  
          
           A Simple System.out logger. 
            |  
       
| Enum | Description | 
|---|---|
| Level |  
          
           The different log levels. 
            |  
       
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