org.springframework.batch.item.file.transform

## Class FixedLengthTokenizer

- java.lang.Object
- - org.springframework.batch.item.file.transform.AbstractLineTokenizer
  - - org.springframework.batch.item.file.transform.FixedLengthTokenizer

- All Implemented Interfaces:
    LineTokenizer

      public class FixedLengthTokenizer
      extends AbstractLineTokenizer

  Tokenizer used to process data obtained from files with fixed-length format. Columns are specified by array of Range objects (`setColumns(Range[])` ).
  Author:
    tomas.slanina, peter.zozom, Dave Syer, Lucas Ward, Michael Minella

- - ### Field Summary

    - ### Fields inherited from class org.springframework.batch.item.file.transform.AbstractLineTokenizer

      `names`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `FixedLengthTokenizer()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected java.util.List<java.lang.String>` | `doTokenize(java.lang.String line)` Yields the tokens resulting from the splitting of the supplied `line`.
    `void` | `setColumns(Range... ranges)` Set the column ranges.

    - ### Methods inherited from class org.springframework.batch.item.file.transform.AbstractLineTokenizer

      `hasNames, isStrict, setFieldSetFactory, setNames, setStrict, tokenize`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### FixedLengthTokenizer

          public FixedLengthTokenizer()

  - ### Method Detail

    - #### setColumns

          public void setColumns(Range... ranges)

      Set the column ranges. Used in conjunction with the `RangeArrayPropertyEditor` this property can be set in the form of a String describing the range boundaries, e.g. "1,4,7" or "1-3,4-6,7" or "1-2,4-5,7-10". If the last range is open then the rest of the line is read into that column (irrespective of the strict flag setting).
      Parameters:
        `ranges` - the column ranges expected in the input
      See Also:
        `AbstractLineTokenizer.setStrict(boolean)`

    - #### doTokenize

          protected java.util.List<java.lang.String> doTokenize(java.lang.String line)

      Yields the tokens resulting from the splitting of the supplied `line`.
      Specified by:
        `doTokenize` in class `AbstractLineTokenizer`
      Parameters:
        `line` - the line to be tokenized (can be `null`)
      Returns:
        the resulting tokens (empty if the line is null)
      Throws:
        `IncorrectLineLengthException` - if line length is greater than or less than the max range set.