#region License
/*
* Copyright 2002-2007 the original author or authors.
*
* 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.
*/
#endregion
using AopAlliance.Aop;
using Spring.Objects.Factory;
using Spring.Util;
namespace Spring.Aop.Support{
/// <summary>
/// Abstract ObjectFactory-based IPointcutAdvisor that allows for any Advice to be
/// configured as reference to an Advice object in an ObjectFactory.
/// </summary>
/// <remarks>
/// specifying the name of an advice object instead of the advice object itself
/// (if running within an ObjectFactory/ApplicationContext increses loose coupling
/// at initialization time, in order not to initialize the advice object until the
/// pointcut actually matches.
/// </remarks>
/// <author>Juergen Hoeller</author>
/// <author>Mark Pollack</author>
public abstract class AbstractObjectFactoryPointcutAdvisor : AbstractPointcutAdvisor, IObjectFactoryAware
{
private string adviceObjectName;
private IObjectFactory objectFactory;
private IAdvice advice;
private object adviceMonitor = new object();
/// <summary>
/// Gets or sets the name of the advice object that this advisor should refer to.
/// </summary>
/// <remarks>An instance of the specified object will be obtained on first access of
/// this advisor's advice. This advisor will only ever obtain at most one
/// single instance of the advice object, caching the instance for the lifetime of
/// the advisor.</remarks>
/// <value>The name of the advice object.</value>
public string AdviceObjectName
{
get { return adviceObjectName; }
set { adviceObjectName = value; }
}
#region IObjectFactoryAware Members
/// <summary>
/// Callback that supplies the owning factory to an object instance.
/// </summary>
/// <value>
/// Owning <see cref="Spring.Objects.Factory.IObjectFactory"/>
/// (may not be <see langword="null"/>). The object can immediately
/// call methods on the factory.
/// </value>
/// <remarks>
/// <p>
/// Invoked after population of normal object properties but before an init
/// callback like <see cref="Spring.Objects.Factory.IInitializingObject"/>'s
/// <see cref="Spring.Objects.Factory.IInitializingObject.AfterPropertiesSet"/>
/// method or a custom init-method.
/// </p>
/// </remarks>
/// <exception cref="Spring.Objects.ObjectsException">
/// In case of initialization errors.
/// </exception>
public IObjectFactory ObjectFactory
{
set { objectFactory = value; }
}
#endregion
/// <summary>
/// Return the advice part of this aspect.
/// </summary>
/// <remarks>
/// <p>
/// An advice may be an interceptor, a throws advice, before advice,
/// introduction etc.
/// </p>
/// </remarks>
/// <returns>
/// The advice that should apply if the pointcut matches.
/// </returns>
public override IAdvice Advice
{
get
{
lock (adviceMonitor)
{
if (advice == null && adviceObjectName != null)
{
AssertUtils.State(objectFactory != null,
"ObjectFactory must be set to resolve 'adviceObjectName'");
advice = objectFactory.GetObject(adviceObjectName, typeof (IAdvice)) as IAdvice;
}
}
return advice;
}
set
{
advice = value;
}
}
/// <summary>
/// Describe this Advisor, showing name of advice object.
/// </summary>
/// <returns>
/// Type name and advice object name.
/// </returns>
public override string ToString()
{
return GetType().Name + ": advice object '" + AdviceObjectName + "'";
}
}
}
|