com.google.gwt.core.client.impl

Class WeakMapping

java.lang.Object

com.google.gwt.core.client.impl.WeakMapping

public class WeakMapping
extends Object

A class associating a (String, Object) map with arbitrary source objects (except for Strings). This implementation is used in Development Mode.

Constructor Summary

Constructors

Constructor and Description
WeakMapping()

Method Summary

Modifier and Type	Method and Description
static Object	get(Object instance, String key) Returns the Object associated with the given key in the (key, value) mapping associated with the given Object instance.
static void	set(Object instance, String key, Object value) Associates a value with a given key in the (key, value) mapping associated with the given Object instance.
static void	setWeak(Object instance, String key, Object value) Like set(Object, String, Object), but doesn't guarantee that value can be retrieved.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, toString

Constructor Detail

WeakMapping

public WeakMapping()

Method Detail

get

public static Object get(Object instance,
                         String key)

Returns the Object associated with the given key in the (key, value) mapping associated with the given Object instance.

Parameters:

instance - the source Object.

key - a String key.

Returns:

an Object associated with that key on the given instance, or null.

set

public static void set(Object instance,
                       String key,
                       Object value)

Associates a value with a given key in the (key, value) mapping associated with the given Object instance. Note that the key space is module-wide, so some care should be taken to choose sufficiently unique identifiers.

Due to restrictions of the Production Mode implementation, the instance argument must not be a String.

Parameters:

instance - the source Object, which must not be a String.

key - a String key.

value - the Object to associate with the key on the given source Object.

Throws:

IllegalArgumentException - if instance is a String.

setWeak

public static void setWeak(Object instance,
                           String key,
                           Object value)

Like set(Object, String, Object), but doesn't guarantee that value can be retrieved.