Jackcess 5.2.0 · io.github.spannm.jackcess.impl.NullMask

Modifier and Type	Field and Description
private final int	columnCount num row columns
private final byte[]	mask The actual bitmask

Access	Constructor and Description
public	NullMask(int Number of columns in the row that this mask will be used for columnCount)

Method Summary

Modifier and Type	Method and Description
private static byte	bitMask(int columnNumber)
private static int	byteIndex(int columnNumber)
public int	Returns: Size in bytes of this mask byteSize() Returns size in bytes of this mask.
public boolean	Returns: Whether or not the value for that column is null. For boolean columns, returns the actual value of the column (where non-`null` == `true`) isNull(ColumnImpl column to test for `null` column) Returns whether or not the value for that column is null.
public void	markNotNull(ColumnImpl column to be marked non-`null` column) Indicate that the column with the given number is not `null` (or a boolean value is `true`).
public void	read(ByteBuffer buffer) Read a mask in from a buffer
public void	write(ByteBuffer buffer) Write a mask to a buffer

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

columnCount	back to summary
private final int columnCount num row columns

mask	back to summary
private final byte[] mask The actual bitmask

NullMask	back to summary
public NullMask(int columnCount) Parameters columnCount:int Number of columns in the row that this mask will be used for

bitMask	back to summary
private static byte bitMask(int columnNumber)

byteIndex	back to summary
private static int byteIndex(int columnNumber)

byteSize	back to summary
public int byteSize() Returns size in bytes of this mask. Returns:int Size in bytes of this mask

byteSize

public int byteSize()

Returns size in bytes of this mask.

isNull back to summary

isNull	back to summary
public boolean isNull(ColumnImpl column) Returns whether or not the value for that column is null. For boolean columns, returns the actual value of the column (where non-`null` == `true`). Parameters column:ColumnImpl column to test for `null` Returns:boolean Whether or not the value for that column is null. For boolean columns, returns the actual value of the column (where non-`null` == `true`)

public boolean isNull(ColumnImpl column)

Returns whether or not the value for that column is null. For boolean columns, returns the actual value of the column (where non-null == true).

Parameters

Returns:boolean

Whether or not the value for that column is null. For boolean columns, returns the actual value of the column (where non-null == true)

markNotNull back to summary

markNotNull	back to summary
public void markNotNull(ColumnImpl column) Indicate that the column with the given number is not `null` (or a boolean value is `true`). Parameters column:ColumnImpl column to be marked non-`null`

public void markNotNull(ColumnImpl column)

Indicate that the column with the given number is not null (or a boolean value is true).

Parameters

read	back to summary
public void read(ByteBuffer buffer) Read a mask in from a buffer

write	back to summary
public void write(ByteBuffer buffer) Write a mask to a buffer