edu.stanford.nlp.util
Class Numberer

java.lang.Object
  edu.stanford.nlp.util.Numberer

All Implemented Interfaces:

Serializable

public class Numberer
extends Object
implements Serializable

Gives unique integer serial numbers to a family of objects, identified by a name space. A Numberer is like a collection of Indexes, and for many purposes it is more straightforward to use an Index, but Numberer can be useful precisely because it maintains a global name space for numbered object families, and provides facilities for mapping across numberings within that space. At any rate, it's widely used in some existing packages.

Author:

Dan Klein

See Also:

Serialized Form

Constructor Summary

Numberer()

Method Summary

static Numberer	getGlobalNumberer(String type)
static Map	getNumberers()
boolean	hasSeen(Object o)
void	lock()
int	number(Object o)
static int	number(String type, Object o) Get a number for an object in namespace type.
Object	object(int n)
static Object	object(String type, int n)
Set	objects()
static void	setNumberers(Map numbs) You need to call this after deserializing Numberer objects to restore the global namespace, since static objects aren't serialized.
String	toString()
int	total()
static int	translate(String sourceType, String targetType, int n) For an Object o that occurs in Numberers of type sourceType and targetType, translates the serial number n of o in the sourceType Numberer to the serial number in the targetType Numberer.

Methods inherited from class java.lang.Object

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

Constructor Detail

Numberer

public Numberer()

Method Detail

getNumberers

public static Map getNumberers()

setNumberers

public static void setNumberers(Map numbs)

You need to call this after deserializing Numberer objects to restore the global namespace, since static objects aren't serialized.

getGlobalNumberer

public static Numberer getGlobalNumberer(String type)

number

public static int number(String type,
                         Object o)

Get a number for an object in namespace type. This looks up the Numberer for type in the global namespace map (creating it if none previously existed), and then returns the appropriate number for the key.

object

public static Object object(String type,
                            int n)

translate

public static int translate(String sourceType,
                            String targetType,
                            int n)

For an Object o that occurs in Numberers of type sourceType and targetType, translates the serial number n of o in the sourceType Numberer to the serial number in the targetType Numberer.

total

public int total()

lock

public void lock()

hasSeen

public boolean hasSeen(Object o)

objects

public Set objects()

number

public int number(Object o)

object

public Object object(int n)

toString

public String toString()

Overrides:

toString in class Object