// Copyright 2004 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.impl;
import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.hivemind.ClassResolver;
import org.apache.hivemind.internal.Module;
import org.apache.hivemind.internal.ServiceImplementationConstructor;
import org.apache.hivemind.util.ConstructorUtils;
/**
* Constructs a service by instantiating a class.
*
* @author Howard Lewis Ship
*/
public final class CreateClassServiceConstructor
extends BaseLocatable
implements ServiceImplementationConstructor
{
private Module _contributingModule;
private String _instanceClassName;
private Class _instanceClass;
public Object constructCoreServiceImplementation()
{
Class instanceClass = getInstanceClass();
return ConstructorUtils.invokeConstructor(instanceClass, null);
}
private synchronized Class getInstanceClass()
{
if (_instanceClass == null)
{
try
{
ClassResolver resolver = _contributingModule.getClassResolver();
_instanceClass = resolver.findClass(_instanceClassName);
}
catch (Exception ex)
{
throw new ApplicationRuntimeException(ex.getMessage(), getLocation(), ex);
}
}
return _instanceClass;
}
public Module getContributingModule()
{
return _contributingModule;
}
public String getInstanceClassName()
{
return _instanceClassName;
}
public void setContributingModule(Module module)
{
_contributingModule = module;
}
public void setInstanceClassName(String string)
{
_instanceClassName = string;
}
}