org.springframework.batch.item.file

## Interface LineMapper<T>

- Type Parameters:
    `T` - type of the domain object
  All Known Implementing Classes:
    DefaultLineMapper, JsonLineMapper, PassThroughLineMapper, PatternMatchingCompositeLineMapper

      public interface LineMapper<T>

  Interface for mapping lines (strings) to domain objects typically used to map lines read from a file to domain objects on a per line basis. Implementations of this interface perform the actual work of parsing a line without having to deal with how the line was obtained.
  Since:
    2.0
  Author:
    Robert Kasanicky
  See Also:
    `FieldSetMapper`, `LineTokenizer`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `T` | `mapLine(java.lang.String line, int lineNumber)` Implementations must implement this method to map the provided line to the parameter type T.

- - ### Method Detail

    - #### mapLine

          T mapLine(java.lang.String line,
                    int lineNumber)
             throws java.lang.Exception

      Implementations must implement this method to map the provided line to the parameter type T. The line number represents the number of lines into a file the current line resides.
      Parameters:
        `line` - to be mapped
        `lineNumber` - of the current line
      Returns:
        mapped object of type T
      Throws:
        `java.lang.Exception` - if error occurred while parsing.