Imported the initial version of the device manager code, as donated by Dennis Geurts, into the repository. Made some minor modifications to the pom.xml, but otherwise it's exactly the ZIP attached to FELIX-10.
git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@752659 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/deviceaccess/src/main/java/org/apache/felix/das/util/DriverLoader.java b/deviceaccess/src/main/java/org/apache/felix/das/util/DriverLoader.java
new file mode 100644
index 0000000..199b8ec
--- /dev/null
+++ b/deviceaccess/src/main/java/org/apache/felix/das/util/DriverLoader.java
@@ -0,0 +1,192 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.felix.das.util;
+
+
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Dictionary;
+import java.util.List;
+
+import org.apache.felix.das.DriverAttributes;
+import org.apache.felix.das.Log;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.BundleException;
+import org.osgi.framework.ServiceReference;
+import org.osgi.service.device.Constants;
+import org.osgi.service.device.DriverLocator;
+
+
+/**
+ * TODO: add javadoc
+ *
+ * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a>
+ */
+public class DriverLoader
+{
+
+ private final BundleContext m_context;
+
+ private final Log m_log;
+
+ public final static String DRIVER_LOCATION_PREFIX = "_DD_";
+
+ /**
+ * to keep track of all loaded drivers
+ */
+ private final List<ServiceReference> m_loadedDrivers;
+
+
+ public DriverLoader( Log log, BundleContext context )
+ {
+ m_log = log;
+ m_context = context;
+ m_loadedDrivers = new ArrayList<ServiceReference>();
+ }
+
+
+ @SuppressWarnings("all")
+ public List<String> findDrivers( Collection<DriverLocator> locators, Dictionary dict )
+ {
+ final List<String> list = new ArrayList<String>();
+ for ( DriverLocator locator : locators )
+ {
+ list.addAll( findDrivers( locator, dict ) );
+ }
+
+ return list;
+ }
+
+
+ @SuppressWarnings("all")
+ private List<String> findDrivers( DriverLocator locator, Dictionary dict )
+ {
+ final List<String> list = new ArrayList<String>();
+ try
+ {
+ String[] ids = locator.findDrivers( dict );
+ if ( ids != null )
+ {
+ list.addAll( Arrays.asList( ids ) );
+ }
+ }
+ catch ( Exception e )
+ {
+ // ignore, will also frequently happen (?)
+ // m_log.error("findDrivers failed for: " + locator, e);
+ }
+
+ return list;
+ }
+
+
+ /**
+ * load all drivers that belong to the given driver Ids
+ *
+ * @param locator
+ * @param driverIds
+ */
+ public List<ServiceReference> loadDrivers( List<DriverLocator> locators, String[] driverIds )
+ {
+ List<ServiceReference> driverRefs = new ArrayList<ServiceReference>();
+
+ for ( String driverId : driverIds )
+ {
+ driverRefs.addAll( loadDriver( locators, driverId ) );
+ }
+
+ return driverRefs;
+ }
+
+
+ private List<ServiceReference> loadDriver( List<DriverLocator> locators, String driverId )
+ {
+ List<ServiceReference> driverRefs = new ArrayList<ServiceReference>();
+
+ for ( DriverLocator driverLocator : locators )
+ {
+ List<ServiceReference> drivers = loadDriver( driverLocator, driverId );
+ driverRefs.addAll( drivers );
+ if ( drivers.size() > 0 )
+ {
+ break;
+ }
+ }
+
+ return driverRefs;
+ }
+
+
+ private List<ServiceReference> loadDriver( DriverLocator locator, String driverId )
+ {
+ List<ServiceReference> driverRefs = new ArrayList<ServiceReference>();
+ try
+ {
+ InputStream in = locator.loadDriver( driverId );
+ // System.out.println(driverId + ", " + locator + " returned: " +
+ // in);
+ Bundle driverBundle = m_context.installBundle( DRIVER_LOCATION_PREFIX + driverId, in );
+
+ driverBundle.start();
+
+ ServiceReference[] refs = driverBundle.getRegisteredServices();
+
+ driverRefs.addAll( Arrays.asList( refs ) );
+ // keep track of them locally
+ m_loadedDrivers.addAll( Arrays.asList( refs ) );
+
+ }
+ catch ( Throwable t )
+ {
+ // ignore, this will happen frequently, if there are multiple
+ // locators
+ }
+ return driverRefs;
+ }
+
+
+ public void unload( DriverAttributes finalDriver )
+ {
+
+ ServiceReference finalRef = null;
+ if ( finalDriver != null )
+ {
+ finalRef = finalDriver.getReference();
+ m_log.debug( "unloading all except: " + finalRef.getProperty( Constants.DRIVER_ID ) );
+ }
+ for ( ServiceReference ref : m_loadedDrivers )
+ {
+ if ( !ref.equals( finalRef ) )
+ {
+ try
+ {
+ m_log.debug( "uninstalling: " + ref.getProperty( Constants.DRIVER_ID ) );
+ ref.getBundle().uninstall();
+ }
+ catch ( BundleException e )
+ {
+ m_log.warning( "unable to uninstall: " + ref.getProperty( Constants.DRIVER_ID ) );
+ }
+ }
+ }
+ }
+}