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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.
*/
package org.apache.tuscany.core.injection;
import org.apache.tuscany.core.builder.ObjectFactory;
import java.lang.reflect.Field;
/**
* 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;
/**
* 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;
}
/**
* 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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