Package app.babylon.table.io

Class HeaderStrategyExpectedHeaders

java.lang.Object

app.babylon.table.io.HeaderStrategyExpectedHeaders

All Implemented Interfaces:

HeaderStrategy

public class HeaderStrategyExpectedHeaders
extends Object
implements HeaderStrategy

Field Summary

Fields inherited from interface app.babylon.table.io.HeaderStrategy

DEFAULT_SCAN_LIMIT

Constructor Summary

Constructors

Constructor	Description
HeaderStrategyExpectedHeaders(int scanLimit)
HeaderStrategyExpectedHeaders(int scanLimit, ColumnName... expectedHeaders)
HeaderStrategyExpectedHeaders(int scanLimit, Collection<ColumnName> expectedHeaders)

Method Summary

Modifier and Type	Method	Description
HeaderDetection	detectFoundHeaders(RowStreamMarkable rowStream, Set<ColumnName> selectedColumns)	Detects the raw headers present in the source.
Collection<ColumnName>	getExpectedHeaders(Collection<ColumnName> x)
int	getScanLimit()	Returns the maximum number of rows to scan during header detection.

Methods inherited from class java.lang.Object

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

Methods inherited from interface app.babylon.table.io.HeaderStrategy

detect

Constructor Details

HeaderStrategyExpectedHeaders

public HeaderStrategyExpectedHeaders(int scanLimit)

HeaderStrategyExpectedHeaders

public HeaderStrategyExpectedHeaders(int scanLimit,
 ColumnName... expectedHeaders)

HeaderStrategyExpectedHeaders

public HeaderStrategyExpectedHeaders(int scanLimit,
 Collection<ColumnName> expectedHeaders)

Method Details

getScanLimit

public int getScanLimit()

Description copied from interface: HeaderStrategy

Returns the maximum number of rows to scan during header detection.

Specified by:

getScanLimit in interface HeaderStrategy

Returns:

scan limit

getExpectedHeaders

public Collection<ColumnName> getExpectedHeaders(Collection<ColumnName> x)

detectFoundHeaders

public HeaderDetection detectFoundHeaders(RowStreamMarkable rowStream,
 Set<ColumnName> selectedColumns)
                                   throws IOException

Description copied from interface: HeaderStrategy

Detects the raw headers present in the source.

Specified by:

detectFoundHeaders in interface HeaderStrategy

Parameters:

rowStream - row stream to inspect

selectedColumns - requested selected columns

Returns:

detected raw header information

Throws:

IOException - if stream inspection fails