Package org.springframework.batch.infrastructure.item.file.mapping

Class PatternMatchingCompositeLineMapper<T>

java.lang.Object

org.springframework.batch.infrastructure.item.file.mapping.PatternMatchingCompositeLineMapper<T>

All Implemented Interfaces:

LineMapper<T>

public class PatternMatchingCompositeLineMapper<T>
extends Object
implements LineMapper<T>

A LineMapper implementation that stores a mapping of String patterns to delegate LineTokenizers as well as a mapping of String patterns to delegate FieldSetMappers. Each line received will be tokenized and then mapped to a field set.

Both the tokenizing and the mapping work in a similar way. The line will be checked for its matching pattern. If the key matches a pattern in the map of delegates, then the corresponding delegate will be used. Patterns are sorted starting with the most specific, and the first match succeeds.

Since:

2.0

Author:

Dan Garrette, Dave Syer, Mahmoud Ben Hassine

See Also:

• PatternMatchingCompositeLineTokenizer

Constructor Summary

Constructors

Constructor	Description
PatternMatchingCompositeLineMapper(Map<String,LineTokenizer> tokenizers, Map<String,FieldSetMapper<T>> fieldSetMappers)	Construct a PatternMatchingCompositeLineMapper with the provided maps of tokenizers and field set mappers.

Method Summary

Modifier and Type	Method	Description
T	mapLine(String line, int lineNumber)	Implementations must implement this method to map the provided line to the parameter type T.
void	setFieldSetMappers(Map<String,FieldSetMapper<T>> fieldSetMappers)
void	setTokenizers(Map<String,LineTokenizer> tokenizers)

Methods inherited from class java.lang.Object

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

Constructor Details

PatternMatchingCompositeLineMapper

public PatternMatchingCompositeLineMapper(Map<String,LineTokenizer> tokenizers,
 Map<String,FieldSetMapper<T>> fieldSetMappers)

Construct a PatternMatchingCompositeLineMapper with the provided maps of tokenizers and field set mappers. Both maps must be non-empty.

Parameters:

tokenizers - the map of patterns to tokenizers

fieldSetMappers - the map of patterns to field set mappers

Since:

6.0

Method Details

mapLine

public T mapLine(String line,
 int lineNumber)
          throws Exception

Description copied from interface: LineMapper

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.

Specified by:

mapLine in interface LineMapper<T>

Parameters:

line - to be mapped

lineNumber - of the current line

Returns:

mapped object of type T

Throws:

Exception - if error occurred while parsing.

setTokenizers

public void setTokenizers(Map<String,LineTokenizer> tokenizers)

setFieldSetMappers

public void setFieldSetMappers(Map<String,FieldSetMapper<T>> fieldSetMappers)