Package it.unimi.di.big.mg4j.document

Class CSVDocumentCollection

java.lang.Object

it.unimi.di.big.mg4j.document.AbstractDocumentSequence

it.unimi.di.big.mg4j.document.CSVDocumentCollection

All Implemented Interfaces:

DocumentSequence, SafelyCloseable, Closeable, Serializable, AutoCloseable

public class CSVDocumentCollection
extends AbstractDocumentSequence
implements Serializable

A DocumentCollection corresponding to a given set of records in a comma separated file.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
CSVDocumentCollection(String fileName, String separator, String[] column, int titleColumn, DocumentFactory factory)

Method Summary

Modifier and Type	Method	Description
void	close()	Closes this document sequence, releasing all resources.
DocumentFactory	factory()	Returns the factory used by this sequence.
DocumentIterator	iterator()	Returns an iterator over the sequence of documents.
static void	main(String[] arg)

Methods inherited from class it.unimi.di.big.mg4j.document.AbstractDocumentSequence

filename, finalize, load

Methods inherited from class java.lang.Object

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

Constructor Detail

CSVDocumentCollection

public CSVDocumentCollection(String fileName,
                             String separator,
                             String[] column,
                             int titleColumn,
                             DocumentFactory factory)
                      throws FileNotFoundException

Throws:

FileNotFoundException

Method Detail

iterator

public DocumentIterator iterator()

Description copied from interface: DocumentSequence

Returns an iterator over the sequence of documents.

Warning: this method can be safely called just one time. For instance, implementations based on standard input will usually throw an exception if this method is called twice.

Implementations may decide to override this restriction (in particular, if they implement DocumentCollection). Usually, however, it is not possible to obtain two iterators at the same time on a collection.

Specified by:

iterator in interface DocumentSequence

Returns:

an iterator over the sequence of documents.

See Also:

DocumentCollection

factory

public DocumentFactory factory()

Description copied from interface: DocumentSequence

Returns the factory used by this sequence.

Every document sequence is based on a document factory that transforms raw bytes into a sequence of characters. The factory contains useful information such as the number of fields.

Specified by:

factory in interface DocumentSequence

Returns:

the factory used by this sequence.

close

public void close()
           throws IOException

Description copied from interface: DocumentSequence

Closes this document sequence, releasing all resources.

You should always call this method after having finished with this document sequence. Implementations are invited to call this method in a finaliser as a safety net (even better, implement SafelyCloseable), but since there is no guarantee as to when finalisers are invoked, you should not depend on this behaviour.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface DocumentSequence

Overrides:

close in class AbstractDocumentSequence

Throws:

IOException

main

public static void main(String[] arg)
                 throws com.martiansoftware.jsap.JSAPException,
                        IllegalAccessException,
                        InvocationTargetException,
                        NoSuchMethodException,
                        IOException,
                        InstantiationException

Throws:

com.martiansoftware.jsap.JSAPException

IllegalAccessException

InvocationTargetException

NoSuchMethodException

IOException

InstantiationException