com.videobug.agent.logging.util

Class ObjectIdMap

java.lang.Object

com.videobug.agent.logging.util.ObjectIdMap

Direct Known Subclasses:

ObjectIdAggregatedStream, ObjectIdFile

public class ObjectIdMap
extends Object

This object assigns a unique ID to each object reference. Conceptually, this is a kind of IdentityHashMap from Object to long.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ObjectIdMap.Entry A simple list structure to store a registered object and its ID.

Field Summary

Fields

Modifier and Type	Field and Description
static int	INT_MAP_CAPACITY

Constructor Summary

Constructors

Constructor and Description
ObjectIdMap(int initialCapacity, File outputDir) Create an instance.

Method Summary

Modifier and Type	Method and Description
int	capacity()
void	close()
long	getId(Object o) Translate an object into an ID.
protected void	onNewObject(Object o) A placeholder for handling a new object.
protected void	onNewObjectId(Object o, long id) A placeholder for handling a new object.
int	size()

Methods inherited from class java.lang.Object

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

Field Detail

INT_MAP_CAPACITY

public static final int INT_MAP_CAPACITY

See Also:

Constant Field Values

Constructor Detail

ObjectIdMap

public ObjectIdMap(int initialCapacity,
                   File outputDir)
            throws IOException

Create an instance.

Parameters:

initialCapacity - is the size of an internal array to manage the contents.

outputDir - location to save the object map, optional

Throws:

IOException

Method Detail

getId

public long getId(Object o)

Translate an object into an ID.

Parameters:

o - is an object used in the logging target program.

Returns:

an ID corresponding to the object. 0 is returned for null.

onNewObject

protected void onNewObject(Object o)

A placeholder for handling a new object. This method is called when a new object is found, before a new ID is assigned.

Parameters:

o - is the object passed to the getId method.

onNewObjectId

protected void onNewObjectId(Object o,
                             long id)

A placeholder for handling a new object. This method is called when a new object is found, after a new ID is assigned.

Parameters:

o - is the object passed to the getId method.

id - is the ID assigned to the object.

size

public int size()

Returns:

the number of objects stored in the map.

capacity

public int capacity()

Returns:

the size of the hash table inside the map. This method is declared for debugging.

close

public void close()