// Copyright 2007 The Apache Software Foundation
//
// 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.tapestry.internal.services;
import org.apache.tapestry.ioc.ObjectLocator;
import org.apache.tapestry.ioc.annotations.Inject;
import org.apache.tapestry.model.MutableComponentModel;
import org.apache.tapestry.services.ClassTransformation;
import org.apache.tapestry.services.ComponentClassTransformWorker;
/**
* Worker triggered by {@link Inject} annotation after all other injection related works have had a
* chance. This implementation is just a wrapper around {@link ObjectLocator#getService(Class)}.
*/
public class DefaultInjectWorker implements ComponentClassTransformWorker
{
private final ObjectLocator _locator;
public DefaultInjectWorker(ObjectLocator locator)
{
_locator = locator;
}
public void transform(ClassTransformation transformation, MutableComponentModel model)
{
for (String fieldName : transformation.findFieldsWithAnnotation(Inject.class))
{
Inject annotation = transformation.getFieldAnnotation(fieldName, Inject.class);
inject(fieldName, transformation, model);
transformation.claimField(fieldName, annotation);
}
}
@SuppressWarnings("unchecked")
private void inject(String fieldName, ClassTransformation transformation,
MutableComponentModel model)
{
String fieldType = transformation.getFieldType(fieldName);
Class type = transformation.toClass(fieldType);
try
{
Object inject = _locator.getService(type);
transformation.injectField(fieldName, inject);
}
catch (Exception ex)
{
throw new RuntimeException(ServicesMessages.fieldInjectionError(transformation
.getClassName(), fieldName, ex), ex);
}
}
}