/**
* Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
*
* 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.onebusaway.federations.annotations;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.onebusaway.collections.PropertyPathExpression;
import org.onebusaway.exceptions.ServiceAreaServiceException;
import org.onebusaway.federations.FederatedService;
import org.onebusaway.federations.FederatedServiceCollection;
import org.onebusaway.geospatial.model.CoordinateBounds;
/**
* Provides a {@link FederatedServiceMethodInvocationHandler} implementation for
* the {@link FederatedByCoordinateBoundsMethod} annotation.
*
* @author bdferris
*/
class FederatedByCoordinateBoundsMethodInvocationHandlerImpl implements
FederatedServiceMethodInvocationHandler {
private int _argumentIndex;
private PropertyPathExpression _expression;
public int getArgumentIndex() {
return _argumentIndex;
}
public PropertyPathExpression getExpression() {
return _expression;
}
public FederatedByCoordinateBoundsMethodInvocationHandlerImpl(Method method,
int argumentIndex, String expression) {
_argumentIndex = argumentIndex;
if (expression != null && expression.length() > 0) {
_expression = new PropertyPathExpression(expression);
Class<?>[] parameterTypes = method.getParameterTypes();
_expression.initialize(parameterTypes[argumentIndex]);
}
}
public Object invoke(FederatedServiceCollection collection, Method method,
Object[] args) throws ServiceAreaServiceException,
IllegalArgumentException, IllegalAccessException,
InvocationTargetException {
Object value = args[_argumentIndex];
if (_expression != null)
value = _expression.invoke(value);
CoordinateBounds bounds = (CoordinateBounds) value;
FederatedService service = collection.getServiceForBounds(bounds);
return method.invoke(service, args);
}
}