package org.nnsoft.guice.autobind.annotations.features;
/*
* Copyright 2012 The 99 Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import static java.lang.String.format;
import static java.util.Collections.addAll;
import static java.util.logging.Logger.getLogger;
import static org.nnsoft.guice.autobind.annotations.To.Type.IMPLEMENTATION;
import static org.nnsoft.guice.autobind.install.BindingStage.BINDING;
import static org.nnsoft.guice.autobind.install.BindingStage.IGNORE;
import static org.nnsoft.guice.autobind.jsr330.Names.named;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.inject.Named;
import javax.inject.Qualifier;
import javax.inject.Singleton;
import org.nnsoft.guice.autobind.annotations.Bind;
import org.nnsoft.guice.autobind.annotations.GuiceAnnotation;
import org.nnsoft.guice.autobind.install.BindingStage;
import org.nnsoft.guice.autobind.scanner.features.BindingScannerFeature;
import com.google.inject.BindingAnnotation;
@Singleton
public class AutoBindingFeature
extends BindingScannerFeature
{
protected final Logger _logger = getLogger( getClass().getName() );
@Override
public BindingStage accept( Class<Object> annotatedClass, Map<String, Annotation> annotations )
{
if ( annotations.containsKey( Bind.class.getName() ) )
{
Bind annotation = (Bind) annotations.get( Bind.class.getName() );
if ( !annotation.multiple() && !( IMPLEMENTATION == annotation.to().value() ) )
{
return BINDING;
}
}
return IGNORE;
}
@SuppressWarnings( "unchecked" )
@Override
public void process( final Class<Object> annotatedClass, final Map<String, Annotation> annotations )
{
Bind annotation = (Bind) annotations.get( Bind.class.getName() );
Map<String, Annotation> filtered = filter( annotations );
final boolean asSingleton =
( annotations.containsKey( com.google.inject.Singleton.class.getName() ) || annotations.containsKey( javax.inject.Singleton.class.getName() ) );
if ( annotation.value().value().length() > 0 )
{
filtered.put( Named.class.getName(), named( resolver.resolve( annotation.value().value() ) ) );
}
Class<Object>[] interfaces;
switch ( annotation.to().value() )
{
case CUSTOM:
interfaces = (Class<Object>[]) annotation.to().customs();
break;
case SUPER:
Class<? super Object> superclass = annotatedClass.getSuperclass();
if ( Object.class.equals( superclass ) )
{
interfaces = new Class[] { annotatedClass };
}
else
{
interfaces = new Class[] { superclass };
}
break;
case INTERFACES:
default:
interfaces = (Class<Object>[]) annotatedClass.getInterfaces();
if ( interfaces.length == 0 )
{
List<Class<?>> interfaceCollection = new ArrayList<Class<?>>();
Class<? super Object> parent = annotatedClass.getSuperclass();
while ( parent != null && !parent.equals( Object.class ) )
{
addAll( interfaceCollection, parent.getInterfaces() );
parent = parent.getSuperclass();
}
interfaces = interfaceCollection.toArray( new Class[interfaceCollection.size()] );
if ( interfaces.length == 0 )
{
interfaces = new Class[] { annotatedClass };
// FIXME Guice doesn't allow a binding to itself
}
}
}
for ( Class<Object> interf : interfaces )
{
if ( _logger.isLoggable( Level.FINE ) )
{
_logger.fine( format( "Binding Class %s to Interface %s. Singleton? %s ",
annotatedClass, interf, asSingleton ) );
}
if ( filtered.size() > 0 )
{
for ( Annotation anno : filtered.values() )
{
bind( annotatedClass, interf, anno, ( asSingleton ? Singleton.class : null ) );
}
}
else
{
bind( annotatedClass, interf, null, ( asSingleton ? Singleton.class : null ) );
}
}
}
@SuppressWarnings( "unchecked" )
protected Map<String, Annotation> filter( final Map<String, Annotation> annotations )
{
Map<String, Annotation> filtered = new HashMap<String, Annotation>( annotations );
for ( Entry<String, Annotation> entry : annotations.entrySet() )
{
String key = entry.getKey();
if ( qualifiers.contains( key ) )
{
continue;
}
if ( others.contains( key ) )
{
filtered.remove( key );
continue;
}
Class<? extends Annotation> annotation;
try
{
annotation = (Class<? extends Annotation>) Class.forName( key );
if ( annotation.isAnnotationPresent( GuiceAnnotation.class ) )
{
filtered.remove( key );
others.add( key );
continue;
}
if ( annotation.isAnnotationPresent( Qualifier.class ) )
{
qualifiers.add( key );
continue;
}
if ( annotation.isAnnotationPresent( BindingAnnotation.class ) )
{
qualifiers.add( key );
continue;
}
filtered.remove( key );
others.add( key );
}
catch ( ClassNotFoundException e )
{
// TODO ignore
}
}
return filtered;
}
}