org.openide.util.lookup

Class AbstractLookup.Pair<T>

java.lang.Object

org.openide.util.Lookup.Item<T>

org.openide.util.lookup.AbstractLookup.Pair<T>

All Implemented Interfaces:

Serializable

Enclosing class:

AbstractLookup

public abstract static class AbstractLookup.Pair<T>
extends Lookup.Item<T>
implements Serializable

Extension to the default lookup item that offers additional information for the data structures use in AbstractLookup

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Pair() For use by subclasses.

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	creatorOf(Object obj) Method that can test whether an instance of a class has been created by this item.
protected abstract boolean	instanceOf(Class<?> c) Tests whether this item can produce object of class c.

Methods inherited from class org.openide.util.Lookup.Item

getDisplayName, getId, getInstance, getType, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Pair

protected Pair()

For use by subclasses.

Method Detail

instanceOf

protected abstract boolean instanceOf(Class<?> c)

Tests whether this item can produce object of class c.

Typically this will produce the same result as c.isAssignableFrom(getType()) but may avoid loading the concrete type's class in doing so.

creatorOf

protected abstract boolean creatorOf(Object obj)

Method that can test whether an instance of a class has been created by this item.

Parameters:

obj - the instance

Returns:

if the item has already create an instance and it is the same as obj.