org.lenskit.util.table.writer

Class TableWriters

java.lang.Object

org.lenskit.util.table.writer.TableWriters

public final class TableWriters
extends java.lang.Object

Utility methods for table writers.

Since:

0.8

Method Summary

Modifier and Type	Method and Description
static TableWriter	noop(TableLayout layout) Create a table writer that does nothing.
static TableWriter	prefixed(TableWriter base, java.util.List<?> prefix) Create a table writer that writes data with common leading columns to an underlying table writer.
static TableWriter	prefixed(TableWriter base, java.lang.Object... prefix) Create a table writer that writes data with common leading columns to an underlying table writer.

Methods inherited from class java.lang.Object

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

Method Detail

noop

public static TableWriter noop(TableLayout layout)

Create a table writer that does nothing.

Returns:

A table writer that discards all rows.

prefixed

public static TableWriter prefixed(@WillNotClose
                                   TableWriter base,
                                   java.util.List<?> prefix)

Create a table writer that writes data with common leading columns to an underlying table writer. The underlying writer will not be closed when the prefixed writer is closed.

Parameters:

base - The base table writer for output.

prefix - The values of the leading columns in this table writer.

Returns:

A table writer with base.getColumnCount() - prefix.size() columns. Each row is prefixed with the values in prefix.

Since:

1.1

prefixed

public static TableWriter prefixed(@WillNotClose
                                   TableWriter base,
                                   java.lang.Object... prefix)

Create a table writer that writes data with common leading columns to an underlying table writer.

Parameters:

base - The base table writer for output.

prefix - The values of the leading columns in this table writer.

Returns:

A table writer with base.getColumnCount() - prefix.length columns. Each row is prefixed with the values in prefix.

Since:

0.8