// 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.hivemind.annotations.internal;
import java.lang.reflect.Method;
import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.hivemind.Location;
import org.apache.hivemind.annotations.definition.Service;
import org.apache.hivemind.definition.ImplementationConstructionContext;
import org.apache.hivemind.definition.ImplementationConstructor;
import org.apache.hivemind.internal.AbstractServiceImplementationConstructor;
/**
* Constructs a service implementation by calling a factory method defined in
* an annotated module by use of the {@link Service} annotation.
*
* @author Achim Huegen
*/
public class MethodCallImplementationConstructor extends AbstractServiceImplementationConstructor implements
ImplementationConstructor
{
private Method _factoryMethod;
private ModuleInstanceProvider _moduleInstanceProvider;
public MethodCallImplementationConstructor(Location location, Method factoryMethod,
ModuleInstanceProvider moduleInstanceProvider)
{
super(location);
_factoryMethod = factoryMethod;
_moduleInstanceProvider = moduleInstanceProvider;
}
public Object constructCoreServiceImplementation(ImplementationConstructionContext context)
{
try
{
Object result = _factoryMethod.invoke(_moduleInstanceProvider.getModuleInstance(), (Object[]) null);
return result;
}
catch (Exception ex)
{
throw new ApplicationRuntimeException(ex.getMessage(), getLocation(), ex);
}
}
}