/******************************************************************************
* Copyright (c) 2006, 2010 VMware Inc., Oracle Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html and the Apache License v2.0
* is available at http://www.opensource.org/licenses/apache2.0.php.
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
* VMware Inc.
* Oracle Inc.
*****************************************************************************/
package org.eclipse.gemini.blueprint.service.importer.support;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.eclipse.gemini.blueprint.util.OsgiBundleUtils;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
/**
* Simple interceptor for temporarily pushing the invoker BundleContext to a
* threadLocal.
*
* This class has package visibility to be able to access the
* {@link LocalBundleContextAdvice} setter method.
*
* <strong>Note</strong>: This class is state-less so the same instance can be
* used by several proxies at the same time.
*
* @author Andy Piper
* @author Costin Leau
*/
class LocalBundleContextAdvice implements MethodInterceptor {
private static final int hashCode = LocalBundleContextAdvice.class.hashCode() * 13;
private final BundleContext context;
LocalBundleContextAdvice(Bundle bundle) {
this(OsgiBundleUtils.getBundleContext(bundle));
}
LocalBundleContextAdvice(BundleContext bundle) {
this.context = bundle;
}
public Object invoke(MethodInvocation invocation) throws Throwable {
// save the old context
BundleContext oldContext = LocalBundleContext.setInvokerBundleContext(context);
try {
return invocation.proceed();
}
finally {
// restore old context
LocalBundleContext.setInvokerBundleContext(oldContext);
}
}
public boolean equals(Object other) {
if (this == other)
return true;
if (other instanceof LocalBundleContextAdvice) {
LocalBundleContextAdvice oth = (LocalBundleContextAdvice) other;
return context.equals(oth.context);
}
return false;
}
public int hashCode() {
return hashCode;
}
}