/*******************************************************************************
* 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.wire;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.inject.Inject;
import javax.inject.Singleton;
import com.google.inject.Injector;
import com.google.inject.TypeLiteral;
import com.google.inject.spi.TypeConverter;
import com.google.inject.spi.TypeConverterBinding;
/**
* Lazy cache of known {@link TypeConverter}s.
*/
@Singleton
final class TypeConverterCache
{
// ----------------------------------------------------------------------
// Implementation fields
// ----------------------------------------------------------------------
private final Map<TypeLiteral<?>, TypeConverter> converterMap =
new ConcurrentHashMap<TypeLiteral<?>, TypeConverter>( 16, 0.75f, 1 );
private final Injector injector;
// ----------------------------------------------------------------------
// Constructors
// ----------------------------------------------------------------------
@Inject
TypeConverterCache( final Injector injector )
{
this.injector = injector;
}
// ----------------------------------------------------------------------
// Public methods
// ----------------------------------------------------------------------
public TypeConverter getTypeConverter( final TypeLiteral<?> type )
{
TypeConverter converter = converterMap.get( type );
if ( null == converter )
{
for ( final TypeConverterBinding b : injector.getTypeConverterBindings() )
{
if ( b.getTypeMatcher().matches( type ) )
{
converter = b.getTypeConverter();
converterMap.put( type, converter );
break;
}
}
}
return converter;
}
}