csv.impl
Class AbstractColumnFilter

java.lang.Object
  csv.impl.AbstractColumnFilter

All Implemented Interfaces:

TableReader, java.util.Iterator<java.lang.Object[]>

Direct Known Subclasses:

DefaultColumnFilter

public abstract class AbstractColumnFilter
extends java.lang.Object
implements TableReader

Filters columns from underlying table reader. This is an abstract implementation only that eases filtering. Most of the methods are forwared to underlying reader.

Author:

ralph

Constructor Summary

AbstractColumnFilter(TableReader reader)
Constructor.

Method Summary

void	close() Closes the underlying reader.
protected java.lang.Object[]	filter(java.lang.Object[] row) Filters columns within a row.
java.lang.Object	get(java.lang.String name, java.lang.Object[] row) Forwarded to underlying reader.
int	getColumnIndex(java.lang.String name) Returns the translated column index.
protected abstract int	getFilteredIndex(int originalIndex) Returns the index in filtered row of the specified original column index.
java.lang.Object[]	getHeaderRow() Returns the header row filtered.
int	getMinimumColumnCount() Forwarded to underlying reader.
protected TableReader	getReader() Returns the underlying reader.
protected int	getRowIndex() Returns the index of current row (delivered rows only)
boolean	hasHeaderRow() Forwarded to underlying reader.
boolean	hasNext() Forwarded to underlying reader.
java.lang.Object[]	next() Returns the row returned by underlying reader and reshuffles according to definition.
void	open() Forwarded to underlying reader.
void	registerCommentCallBack(CommentCallback callback) Forwarded to underlying reader.
void	remove() Forwarded to underlying reader.
void	reset() Forwarded to underlying reader.
void	setHasHeaderRow(boolean hasHeaderRow) Forwarded to underlying reader.
void	setMinimumColumnCount(int length) Forwarded to underlying reader.
void	unregisterCommentCallBack(CommentCallback callback) Forwarded to underlying reader.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractColumnFilter

public AbstractColumnFilter(TableReader reader)

Constructor.

Method Detail

getReader

protected TableReader getReader()

Returns the underlying reader.

Returns:

the reader

close

public void close()

Closes the underlying reader.

Specified by:

close in interface TableReader

See Also:

TableReader.close()

get

public java.lang.Object get(java.lang.String name,
                            java.lang.Object[] row)

Forwarded to underlying reader.

Specified by:

get in interface TableReader

Parameters:

name - name of column (from header row)

row - row of values

Returns:

value in row for specified column.

See Also:

TableReader.get(java.lang.String, java.lang.Object[])

getColumnIndex

public int getColumnIndex(java.lang.String name)

Returns the translated column index.

Specified by:

getColumnIndex in interface TableReader

Parameters:

name - name of column

Returns:

index of column or -1 if it does not exist.

See Also:

getFilteredIndex(int), TableReader.getColumnIndex(java.lang.String)

getHeaderRow

public java.lang.Object[] getHeaderRow()

Returns the header row filtered.

Specified by:

getHeaderRow in interface TableReader

Returns:

header row if such was defined.

See Also:

TableReader.getHeaderRow()

getMinimumColumnCount

public int getMinimumColumnCount()

Forwarded to underlying reader.

Specified by:

getMinimumColumnCount in interface TableReader

Returns:

length number of columns

See Also:

TableReader.getMinimumColumnCount()

hasHeaderRow

public boolean hasHeaderRow()

Forwarded to underlying reader.

Specified by:

hasHeaderRow in interface TableReader

Returns:

true if there is a header row.

See Also:

TableReader.hasHeaderRow()

open

public void open()

Forwarded to underlying reader.

Specified by:

open in interface TableReader

See Also:

TableReader.open()

registerCommentCallBack

public void registerCommentCallBack(CommentCallback callback)

Forwarded to underlying reader.

Specified by:

registerCommentCallBack in interface TableReader

Parameters:

callback - callback to be registered

See Also:

TableReader.registerCommentCallBack(csv.CommentCallback)

reset

public void reset()

Forwarded to underlying reader.

Specified by:

reset in interface TableReader

See Also:

TableReader.reset()

setHasHeaderRow

public void setHasHeaderRow(boolean hasHeaderRow)

Forwarded to underlying reader.

Specified by:

setHasHeaderRow in interface TableReader

Parameters:

hasHeaderRow - true if there is a header row.

See Also:

TableReader.setHasHeaderRow(boolean)

setMinimumColumnCount

public void setMinimumColumnCount(int length)

Forwarded to underlying reader.

Specified by:

setMinimumColumnCount in interface TableReader

Parameters:

length - number of columns

See Also:

TableReader.setMinimumColumnCount(int)

unregisterCommentCallBack

public void unregisterCommentCallBack(CommentCallback callback)

Forwarded to underlying reader.

Specified by:

unregisterCommentCallBack in interface TableReader

Parameters:

callback - callback to be unregistered

See Also:

TableReader.unregisterCommentCallBack(csv.CommentCallback)

hasNext

public boolean hasNext()

Forwarded to underlying reader.

Specified by:

hasNext in interface java.util.Iterator<java.lang.Object[]>

See Also:

Iterator.hasNext()

getRowIndex

protected int getRowIndex()

Returns the index of current row (delivered rows only)

Returns:

the rowIndex

next

public java.lang.Object[] next()

Returns the row returned by underlying reader and reshuffles according to definition.

Specified by:

next in interface java.util.Iterator<java.lang.Object[]>

See Also:

getFilteredIndex(int), Iterator.next()

filter

protected java.lang.Object[] filter(java.lang.Object[] row)

Filters columns within a row. Do not override here but override getFilteredIndex(int) instead.

Parameters:

row - row to be filtered

Returns:

row with filtered column sonly

See Also:

getFilteredIndex(int)

getFilteredIndex

protected abstract int getFilteredIndex(int originalIndex)

Returns the index in filtered row of the specified original column index.

Parameters:

originalIndex - index of value in row from underlying reader

Returns:

index of value in filtered row or -1 if column will not be visible.

remove

public void remove()

Forwarded to underlying reader.

Specified by:

remove in interface java.util.Iterator<java.lang.Object[]>

See Also:

Iterator.remove()