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package org.apache.tuscany.core.injection;
import java.lang.reflect.Field;
import org.apache.tuscany.core.builder.ObjectFactory;
/**
* Injects a value created by an {@link ObjectFactory} on a given field
*
* @version $Rev$ $Date$
*/
public class FieldInjector<T> implements Injector<T> {
private final Field field;
private final ObjectFactory<?> objectFactory;
// //----------------------------------
// Constructors
// ----------------------------------
/**
* Create an injector and have it use the given <code>ObjectFactory</code>
* to inject a value on the instance using the reflected <code>Field</code>
*/
public FieldInjector(Field field, ObjectFactory<?> objectFactory) {
this.field = field;
this.objectFactory = objectFactory;
}
// ----------------------------------
// Methods
// ----------------------------------
/**
* Inject a new value on the given isntance
*/
public void inject(T instance) throws ObjectCreationException {
try {
field.set(instance, objectFactory.getInstance());
} catch (IllegalAccessException e) {
throw new AssertionError("Field is not accessible [" + field + "]");
}
}
}
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