Package org.jeasy.batch.core.reader

Class AbstractMultiFileRecordReader<P>

java.lang.Object

org.jeasy.batch.core.reader.AbstractMultiFileRecordReader<P>

Type Parameters:

P - type of the record's payload

All Implemented Interfaces:

RecordReader<P>

public abstract class AbstractMultiFileRecordReader<P>
extends java.lang.Object
implements RecordReader<P>

Template class for multi-files record readers. Implementations should provide how to create the delegate reader in createReader() method. Using multi-files readers assumes all files have the same format.

Author:

Mahmoud Ben Hassine ([email protected])

Field Summary

Fields

Modifier and Type	Field	Description
protected java.nio.charset.Charset	charset
protected java.nio.file.Path	currentFile
protected AbstractFileRecordReader<P>	delegate
protected java.util.List<java.nio.file.Path>	files
protected java.util.Iterator<java.nio.file.Path>	iterator

Constructor Summary

Constructors

Constructor	Description
AbstractMultiFileRecordReader(java.util.List<java.nio.file.Path> files)	Create a new multi-file record reader.
AbstractMultiFileRecordReader(java.util.List<java.nio.file.Path> files, java.nio.charset.Charset charset)	Create a new multi-file record reader.

Method Summary

Modifier and Type	Method	Description
void	close()	Close the reader.
protected abstract AbstractFileRecordReader<P>	createReader()
void	open()	Open the reader.
Record<P>	readRecord()	Read next record from the data source.

Methods inherited from class java.lang.Object

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

Field Detail

files

protected java.util.List<java.nio.file.Path> files

currentFile

protected java.nio.file.Path currentFile

delegate

protected AbstractFileRecordReader<P> delegate

iterator

protected java.util.Iterator<java.nio.file.Path> iterator

charset

protected java.nio.charset.Charset charset

Constructor Detail

AbstractMultiFileRecordReader

public AbstractMultiFileRecordReader(java.util.List<java.nio.file.Path> files)

Create a new multi-file record reader.

Parameters:

files - to read

AbstractMultiFileRecordReader

public AbstractMultiFileRecordReader(java.util.List<java.nio.file.Path> files,
                                     java.nio.charset.Charset charset)

Create a new multi-file record reader.

Parameters:

files - to read

charset - of the file

Method Detail

open

public void open()
          throws java.lang.Exception

Description copied from interface: RecordReader

Open the reader.

Specified by:

open in interface RecordReader<P>

Throws:

java.lang.Exception - if an error occurs during reader opening

readRecord

public Record<P> readRecord()
                     throws java.lang.Exception

Description copied from interface: RecordReader

Read next record from the data source.

Specified by:

readRecord in interface RecordReader<P>

Returns:

the next record from the data source or null if the end of the data source is reached

Throws:

java.lang.Exception - if an error occurs during reading next record

close

public void close()
           throws java.lang.Exception

Description copied from interface: RecordReader

Close the reader.

Specified by:

close in interface RecordReader<P>

Throws:

java.lang.Exception - if an error occurs during reader closing

createReader

protected abstract AbstractFileRecordReader<P> createReader()
                                                     throws java.lang.Exception

Throws:

java.lang.Exception