org.grouplens.lenskit.data.dao

Class DelimitedTextRatingCursor

java.lang.Object

org.grouplens.lenskit.cursors.AbstractCursor<T>

org.grouplens.lenskit.cursors.AbstractPollingCursor<Rating>

org.grouplens.lenskit.data.dao.DelimitedTextRatingCursor

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<Rating>, Cursor<Rating>

Deprecated.

Use the code in org.grouplens.lenskit.data.text.

@Deprecated
public class DelimitedTextRatingCursor
extends AbstractPollingCursor<Rating>

Cursor that parses arbitrary delimited text into Rating objects.

Since:

2.2

Compatibility

Public

Field Summary

Fields

Modifier and Type	Field and Description
protected org.slf4j.Logger	logger Deprecated.

Constructor Summary

Constructors

Constructor and Description
DelimitedTextRatingCursor(BufferedReader s, String name, String delimiter) Deprecated. Inheriting from this class is deprecated.

Method Summary

Modifier and Type	Method and Description
void	close() Deprecated. No-op implementation of the Cursor.close() method.
Rating	copy(Rating r) Deprecated. Construct a copy of an object.
static Cursor<Rating>	open(BufferedReader s, String delimiter) Deprecated.
Rating	poll() Deprecated. Return the next element in this Cursor, or null if there are no more elements.

Methods inherited from class org.grouplens.lenskit.cursors.AbstractPollingCursor

fastNext, hasNext, next

Methods inherited from class org.grouplens.lenskit.cursors.AbstractCursor

fast, getRowCount, iterator

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

logger

protected org.slf4j.Logger logger

Deprecated.

Constructor Detail

DelimitedTextRatingCursor

@Deprecated
public DelimitedTextRatingCursor(@WillCloseWhenClosed @Nonnull
                                             BufferedReader s,
                                             @Nullable
                                             String name,
                                             @Nonnull
                                             String delimiter)

Deprecated. Inheriting from this class is deprecated.

Construct a rating cursor from a reader.

Parameters:

s - The reader to read.

name - The file name (for error messages).

delimiter - The delimiter.

Method Detail

open

public static Cursor<Rating> open(@WillCloseWhenClosed @Nonnull
                                  BufferedReader s,
                                  @Nonnull
                                  String delimiter)

Deprecated.

close

public void close()

Deprecated.

Description copied from class: AbstractCursor

No-op implementation of the Cursor.close() method.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Cursor<Rating>

Overrides:

close in class AbstractCursor<Rating>

poll

public Rating poll()

Deprecated.

Description copied from class: AbstractPollingCursor

Return the next element in this Cursor, or null if there are no more elements. This must be safe to call multiple times at the end of its collection. The same element object is allowed to be reused (fast iteration), so long as AbstractPollingCursor.copy(Object) copies objects. If this method returns a fresh object every time, then AbstractPollingCursor.copy(Object) should be a no-op.

Specified by:

poll in class AbstractPollingCursor<Rating>

Returns:

The next element, or null

copy

public Rating copy(Rating r)

Deprecated.

Description copied from class: AbstractPollingCursor

Construct a copy of an object. The default does not copy; it just returns its parameter. If a subclass wants to fast iteration to actually be fast (mutate and reuse the same object), it should do so in its AbstractPollingCursor.poll() method, and override this method to create a new copy of an object for when AbstractPollingCursor.next() is called. Subclasses which return fresh objects on each call to AbstractPollingCursor.poll() do not need to override this method.

Overrides:

copy in class AbstractPollingCursor<Rating>

Parameters:

r - The object to copy.

Returns:

A copy of obj.