[jboss-cvs] jboss-seam/src/ioc/org/jboss/seam/ioc/microcontainer ...

[Ales Justin]

  User: alesj   
  Date: 07/03/02 09:53:23

  Added:       src/ioc/org/jboss/seam/ioc/microcontainer 
                        SeamIntroduction.java
  Log:
  Seam component introduction via JBoss AOP.
  
  Revision  Changes    Path
  1.1      date: 2007/03/02 14:53:23;  author: alesj;  state: Exp;jboss-seam/src/ioc/org/jboss/seam/ioc/microcontainer/SeamIntroduction.java
  
  Index: SeamIntroduction.java
  ===================================================================
  /*
  * JBoss, Home of Professional Open Source
  * Copyright 2006, JBoss Inc., and individual contributors as indicated
  * by the @authors tag. See the copyright.txt in the distribution for a
  * full listing of individual contributors.
  *
  * This is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation; either version 2.1 of
  * the License, or (at your option) any later version.
  *
  * This software is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this software; if not, write to the Free
  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
  */
  package org.jboss.seam.ioc.microcontainer;
  
  import org.jboss.aop.advice.Interceptor;
  import org.jboss.aop.joinpoint.Invocation;
  import org.jboss.aop.joinpoint.MethodInvocation;
  import org.jboss.kernel.spi.dependency.KernelControllerContext;
  import org.jboss.seam.ScopeType;
  import org.jboss.seam.annotations.Name;
  import org.jboss.seam.annotations.Scope;
  import org.jboss.seam.contexts.Contexts;
  import org.jboss.seam.contexts.Lifecycle;
  import org.jboss.seam.init.Initialization;
  
  /**
   * A Seam binding aspect that creates bindings on interception of the kernel setKernelControllerContext
   * callback, and removes them on any other method. The expectation is that this is applied to the
   * org.jboss.kernel.spi.dependency.KernelControllerContextAware interface so that unbinding occurs on
   * the unsetKernelControllerContext method.
   *
   * @author <a href="mailto:ales.justin at jboss.com">Ales Justin</a>
   */
  public class SeamIntroduction implements Interceptor
  {
      public String getName()
      {
          return getClass().getName();
      }
  
      public Object invoke(Invocation invocation) throws Throwable
      {
          MethodInvocation mi = (MethodInvocation)invocation;
          KernelControllerContext context = (KernelControllerContext)mi.getArguments()[0];
          Name name = (Name)invocation.resolveClassAnnotation(Name.class);
          Scope scope = (Scope)invocation.resolveClassAnnotation(Scope.class);
          ScopeType scopeType = scope != null ? scope.value() : null;
          if ("setKernelControllerContext".equals(mi.getMethod().getName()) && name != null)
          {
              Object target = context.getTarget();
              boolean unmockApplication = false;
              if (!Contexts.isApplicationContextActive())
              {
                  Lifecycle.mockApplication();
                  unmockApplication = true;
              }
              try
              {
                  Contexts.getApplicationContext().set(
                          name + Initialization.COMPONENT_SUFFIX,
                          new MicrocontainerComponent(target.getClass(), name.value(), scopeType, context.getController())
                  );
              }
              finally
              {
                  if (unmockApplication)
                  {
                      Lifecycle.unmockApplication();
                  }
              }
          }
          else if (name != null && scopeType != null)
          {
              scopeType.getContext().remove(name.value());
          }
          return null;
      }
  
  }