/*******************************************************************************
* 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.bean;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.security.AccessController;
import java.security.PrivilegedAction;
import com.google.inject.ProvisionException;
import com.google.inject.TypeLiteral;
/**
* {@link BeanProperty} backed by a {@link Field}.
*/
final class BeanPropertyField<T>
implements BeanProperty<T>, PrivilegedAction<Void>
{
// ----------------------------------------------------------------------
// Implementation fields
// ----------------------------------------------------------------------
private final Field field;
// ----------------------------------------------------------------------
// Constructors
// ----------------------------------------------------------------------
BeanPropertyField( final Field field )
{
this.field = field;
}
// ----------------------------------------------------------------------
// Public methods
// ----------------------------------------------------------------------
public <A extends Annotation> A getAnnotation( final Class<A> annotationType )
{
return field.getAnnotation( annotationType );
}
@SuppressWarnings( "unchecked" )
public TypeLiteral<T> getType()
{
return (TypeLiteral<T>) TypeLiteral.get( field.getGenericType() );
}
public String getName()
{
return field.getName();
}
public <B> void set( final B bean, final T value )
{
if ( !field.isAccessible() )
{
// make sure we can apply the binding
AccessController.doPrivileged( this );
}
try
{
field.set( bean, value );
}
catch ( final Exception e )
{
throw new ProvisionException( "Error injecting: " + field, e );
}
catch ( final LinkageError e )
{
throw new ProvisionException( "Error injecting: " + field, e );
}
}
@Override
public int hashCode()
{
return field.hashCode();
}
@Override
public boolean equals( final Object rhs )
{
if ( this == rhs )
{
return true;
}
if ( rhs instanceof BeanPropertyField<?> )
{
return field.equals( ( (BeanPropertyField<?>) rhs ).field );
}
return false;
}
@Override
public String toString()
{
return field.toString();
}
// ----------------------------------------------------------------------
// PrivilegedAction methods
// ----------------------------------------------------------------------
public Void run()
{
// enable private injection
field.setAccessible( true );
return null;
}
}