com.threerings.io
Class ArrayMask

java.lang.Object
  com.threerings.io.ArrayMask

public class ArrayMask
extends Object

Used to keep track of which entries in an array are null and which are not. Note: only arrays up to 262,144 elements in length can be handled by this class.

Field Summary

protected byte[]

_mask A byte array with bits for every entry in the source array.

Constructor Summary

ArrayMask()
Creates an array mask suitable for unserializing.

ArrayMask(int length)
Creates an array mask for an array of the specified length.

Method Summary

boolean	isSet(int index) Returns true if the specified array index should be non-null.
void	readFrom(ObjectInputStream in) Reads this mask from the specified input stream.
void	set(int index) Sets the bit indicating that the specified array index is non-null.
void	writeTo(ObjectOutputStream out) Writes this mask to the specified output stream.

Methods inherited from class java.lang.Object

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

Field Detail

_mask

protected byte[] _mask

A byte array with bits for every entry in the source array.

Constructor Detail

ArrayMask

public ArrayMask()

Creates an array mask suitable for unserializing.

ArrayMask

public ArrayMask(int length)

Creates an array mask for an array of the specified length.

Method Detail

set

public void set(int index)

Sets the bit indicating that the specified array index is non-null.

isSet

public boolean isSet(int index)

Returns true if the specified array index should be non-null.

writeTo

public void writeTo(ObjectOutputStream out)
             throws IOException

Writes this mask to the specified output stream.

Throws:

IOException

readFrom

public void readFrom(ObjectInputStream in)
              throws IOException

Reads this mask from the specified input stream.

Throws:

IOException