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/*******************************************************************************
* Copyright (c) 2005 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.metatype;
import java.io.IOException;
import java.security.*;
import java.util.Hashtable;
import javax.xml.parsers.SAXParserFactory;
import org.osgi.framework.*;
import org.osgi.service.metatype.MetaTypeInformation;
import org.osgi.service.metatype.MetaTypeService;
/**
* Implementation of MetaTypeService
*/
public class MetaTypeServiceImpl implements MetaTypeService, SynchronousBundleListener {
BundleContext _context;
SAXParserFactory _parserFactory;
private Hashtable _mtps = new Hashtable(7);
/**
* Constructor of class MetaTypeServiceImpl.
*/
public MetaTypeServiceImpl(BundleContext context, SAXParserFactory parserFactory) {
this._context = context;
this._parserFactory = parserFactory;
}
/*
* (non-Javadoc)
*
* @see org.osgi.service.metatype.MetaTypeService#getMetaTypeInformation(org.osgi.framework.Bundle)
*/
public MetaTypeInformation getMetaTypeInformation(Bundle bundle) {
MetaTypeInformation mti;
try {
mti = getMetaTypeProvider(bundle);
} catch (IOException e) {
Logging.log(Logging.ERROR, "IOException in MetaTypeInformation:getMetaTypeInformation(Bundle bundle)"); //$NON-NLS-1$
e.printStackTrace();
mti = null;
}
return mti;
}
/**
* Internal Method - to get MetaTypeProvider object.
*/
private MetaTypeInformation getMetaTypeProvider(final Bundle b) throws java.io.IOException {
try {
Long bID = new Long(b.getBundleId());
synchronized (_mtps) {
if (_mtps.containsKey(bID))
return (MetaTypeInformation) _mtps.get(bID);
MetaTypeInformation mti = (MetaTypeInformation) AccessController.doPrivileged(new PrivilegedExceptionAction() {
public Object run() throws IOException {
MetaTypeInformationImpl impl = new MetaTypeInformationImpl(b, _parserFactory);
if (!impl._isThereMeta)
return new MetaTypeProviderTracker(_context, b);
return impl;
}
});
_mtps.put(bID, mti);
return mti;
}
} catch (PrivilegedActionException pae) {
throw (IOException) pae.getException();
}
}
/*
* (non-Javadoc)
*
* @see org.osgi.framework.BundleListener#bundleChanged(org.osgi.framework.BundleEvent)
*/
public void bundleChanged(BundleEvent event) {
int type = event.getType();
Long bID = new Long(event.getBundle().getBundleId());
switch (type) {
case BundleEvent.UPDATED :
case BundleEvent.UNINSTALLED :
_mtps.remove(bID);
break;
case BundleEvent.INSTALLED :
case BundleEvent.RESOLVED :
case BundleEvent.STARTED :
case BundleEvent.STOPPED :
case BundleEvent.UNRESOLVED :
default :
break;
}
}
}
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