/*******************************************************************************
* Copyright (c) 2010-present 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 org.eclipse.sisu.inject.Logs;
import org.eclipse.sisu.inject.TypeArguments;
import com.google.inject.Binding;
import com.google.inject.Key;
import com.google.inject.TypeLiteral;
import com.google.inject.spi.BindingTargetVisitor;
import com.google.inject.spi.DefaultBindingTargetVisitor;
import com.google.inject.spi.InjectionPoint;
import com.google.inject.spi.LinkedKeyBinding;
import com.google.inject.spi.UntargettedBinding;
/**
* {@link BindingTargetVisitor} that verifies any injected dependencies.
*/
final class DependencyVerifier
extends DefaultBindingTargetVisitor<Object, Boolean>
{
// ----------------------------------------------------------------------
// Public methods
// ----------------------------------------------------------------------
@Override
public Boolean visit( final UntargettedBinding<?> binding )
{
return verifyImplementation( binding.getKey().getTypeLiteral() );
}
@Override
public Boolean visit( final LinkedKeyBinding<?> binding )
{
final Key<?> linkedKey = binding.getLinkedKey();
if ( linkedKey.getAnnotationType() == null )
{
return verifyImplementation( linkedKey.getTypeLiteral() );
}
return Boolean.TRUE; // indirect binding, don't scan
}
@Override
public Boolean visitOther( final Binding<?> binding )
{
return Boolean.TRUE;
}
// ----------------------------------------------------------------------
// Implementation methods
// ----------------------------------------------------------------------
private static Boolean verifyImplementation( final TypeLiteral<?> type )
{
if ( TypeArguments.isConcrete( type ) && !type.toString().startsWith( "java" ) )
{
try
{
InjectionPoint.forInstanceMethodsAndFields( type );
InjectionPoint.forConstructorOf( type );
}
catch ( final RuntimeException e )
{
Logs.trace( "Potential problem: {}", type, e );
return Boolean.FALSE;
}
catch ( final LinkageError e )
{
Logs.trace( "Potential problem: {}", type, e );
return Boolean.FALSE;
}
}
return Boolean.TRUE;
}
}