/*******************************************************************************
* Copyright (c) 2010, 2014 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Stuart McCulloch (Sonatype, Inc.) - initial API and implementation
*******************************************************************************/
package org.eclipse.sisu.inject;
import com.google.inject.Binding;
import com.google.inject.ImplementedBy;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.ProvidedBy;
import com.google.inject.TypeLiteral;
/**
* Source of "implicit" bindings; includes @{@link ImplementedBy}, @{@link ProvidedBy}, and concrete types.
*/
final class ImplicitBindings
{
// ----------------------------------------------------------------------
// Implementation fields
// ----------------------------------------------------------------------
private final Iterable<BindingPublisher> publishers;
// ----------------------------------------------------------------------
// Constructors
// ----------------------------------------------------------------------
ImplicitBindings( final Iterable<BindingPublisher> publishers )
{
this.publishers = publishers;
}
// ----------------------------------------------------------------------
// Public methods
// ----------------------------------------------------------------------
@SuppressWarnings( { "unchecked", "rawtypes" } )
public <T> Binding<T> get( final TypeLiteral<T> type )
{
final Key implicitKey = TypeArguments.implicitKey( type.getRawType() );
for ( final BindingPublisher p : publishers )
{
if ( p instanceof InjectorPublisher )
{
// first round: check for any re-written implicit bindings
final Injector i = ( (InjectorPublisher) p ).getInjector();
final Binding binding = i.getBindings().get( implicitKey );
if ( null != binding )
{
Logs.trace( "Using implicit binding: {} from: <>", binding, i );
return binding;
}
}
}
final Key justInTimeKey = Key.get( type );
for ( final BindingPublisher p : publishers )
{
if ( p instanceof InjectorPublisher )
{
// second round: fall back to just-in-time binding lookup
final Injector i = ( (InjectorPublisher) p ).getInjector();
try
{
final Binding binding = i.getBinding( justInTimeKey );
if ( InjectorPublisher.isVisible( binding ) )
{
Logs.trace( "Using just-in-time binding: {} from: <>", binding, i );
return binding;
}
}
catch ( final RuntimeException e ) // NOPMD
{
Logs.trace( "Problem with just-in-time binding: {}", justInTimeKey, e );
}
catch ( final LinkageError e ) // NOPMD
{
Logs.trace( "Problem with just-in-time binding: {}", justInTimeKey, e );
}
}
}
return null;
}
}