ILogReader (IoTDB Server 0.14.0-preview2 API)

All Known Implementing Classes:

BatchLogReader, MultiFileLogReader, SingleFileLogReader
```
public interface ILogReader
```
ILogReader is an iterator of PhysicalPlan but throws IOException and provide a close() method. This class can be used just like java iterators, but remember to close it after use.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	release resources occupied by this object, like file streams.
`boolean`	`hasNext()`	return whether there exists next log to be read.
`PhysicalPlan`	`next()`	return the next log read from media like a WAL file and covert it to a PhysicalPlan.

- Method Detail
  - close
```
void close()
```
    release resources occupied by this object, like file streams.
  - hasNext
```
boolean hasNext()
         throws java.io.FileNotFoundException
```
    return whether there exists next log to be read.
    
    Returns:
    
    whether there exists next log to be read.
    
    Throws:
    
    java.io.IOException
    
    java.io.FileNotFoundException
  - next
```
PhysicalPlan next()
           throws java.io.FileNotFoundException
```
    return the next log read from media like a WAL file and covert it to a PhysicalPlan.
    
    Returns:
    
    the next log as a PhysicalPlan
    
    Throws:
    
    java.util.NoSuchElementException - when there are no more logs
    
    java.io.FileNotFoundException