org.openide.util.lookup
Class ProxyLookup

java.lang.Object
  |
  +--org.openide.util.Lookup
        |
        +--org.openide.util.lookup.ProxyLookup

public class ProxyLookup

extends Lookup

Implementation of lookup that can delegate to others.

Since:

1.9

Inner classes inherited from class org.openide.util.Lookup

Lookup.Item, Lookup.Result, Lookup.Template

Fields inherited from class org.openide.util.Lookup

EMPTY

Constructor Summary

ProxyLookup(Lookup[] lookups)
Create a proxy to some other lookups.

Method Summary

protected void	beforeLookup(Lookup.Template template) Notifies subclasses that a query is about to be processed.
protected Lookup[]	getLookups() Getter for the delegates.
Object	lookup(Class clazz) Look up an object matching a given interface.
Lookup.Result	lookup(Lookup.Template template) The general lookup method.
Lookup.Item	lookupItem(Lookup.Template template) Look up the first item matching a given template.
protected void	setLookups(Lookup[] lookups) Change the delegates.

Methods inherited from class org.openide.util.Lookup

getDefault

Methods inherited from class java.lang.Object

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

Constructor Detail

ProxyLookup

public ProxyLookup(Lookup[] lookups)

Create a proxy to some other lookups.

Parameters:

lookups - the initial delegates

Method Detail

getLookups

protected final Lookup[] getLookups()

Getter for the delegates.

Returns:

the array of lookups we delegate to

Since:

1.19

setLookups

protected final void setLookups(Lookup[] lookups)

Change the delegates. To forbid anybody else then the creator of the lookup to change the delegates, this method is protected.

Parameters:

lookups - the new lookups to delegate to

Since:

1.19 protected

beforeLookup

protected void beforeLookup(Lookup.Template template)

Notifies subclasses that a query is about to be processed. Subclasses can update its state before the actual processing begins. It is allowed to call setLookups method to change/update the set of objects the proxy delegates to.

Parameters:

template - the template of the query

Since:

1.31

lookup

public final Object lookup(Class clazz)

Description copied from class: Lookup

Look up an object matching a given interface. This is the simplest method to use. If more than one object matches, one will be returned arbitrarily. The template class may be a class or interface; the instance is guaranteed to be assignable to it.

Overrides:

lookup in class Lookup

Following copied from class: org.openide.util.Lookup

Parameters:

clazz - class of the object we are searching for

Returns:

an object implementing the given class or null if no such implementation is found

lookupItem

public final Lookup.Item lookupItem(Lookup.Template template)

Description copied from class: Lookup

Look up the first item matching a given template. Includes not only the instance but other associated information.

Overrides:

lookupItem in class Lookup

Following copied from class: org.openide.util.Lookup

Parameters:

template - the template to check

Returns:

a matching item or null

lookup

public final Lookup.Result lookup(Lookup.Template template)

Description copied from class: Lookup

The general lookup method.

Overrides:

lookup in class Lookup

Following copied from class: org.openide.util.Lookup

Parameters:

template - a template describing the services to look for

Returns:

an object containing the results