/*
* 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.karaf.bundle.command;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
import org.apache.karaf.shell.api.action.Command;
import org.apache.karaf.shell.api.action.Option;
import org.apache.karaf.shell.api.action.lifecycle.Service;
import org.apache.karaf.shell.support.ShellUtil;
import org.osgi.framework.Bundle;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.wiring.BundleCapability;
import org.osgi.framework.wiring.BundleRequirement;
import org.osgi.framework.wiring.BundleWire;
import org.osgi.framework.wiring.BundleWiring;
@Command(scope = "bundle", name = "requirements", description = "Displays OSGi requirements of a given bundles.")
@Service
public class Requirements extends BundlesCommand {
public static final String NONSTANDARD_SERVICE_NAMESPACE = "service";
private static final String EMPTY_MESSAGE = "[EMPTY]";
private static final String UNRESOLVED_MESSAGE = "[UNRESOLVED]";
@Option(name = "--namespace")
String namespace = "*";
@Override
protected void executeOnBundle(Bundle bundle) throws Exception {
}
@Override
protected Object doExecute(List<Bundle> bundles) throws Exception {
boolean separatorNeeded = false;
Pattern ns = Pattern.compile(namespace.replaceAll("\\.", "\\\\.").replaceAll("\\*", ".*"));
for (Bundle b : bundles) {
if (separatorNeeded) {
System.out.println("");
}
// Print out any matching generic requirements.
BundleWiring wiring = b.adapt(BundleWiring.class);
if (wiring != null) {
String title = b + " requires:";
System.out.println(title);
System.out.println(ShellUtil.getUnderlineString(title));
boolean matches = printMatchingRequirements(wiring, ns);
// Handle service requirements separately, since they aren't part
// of the generic model in OSGi.
if (matchNamespace(ns, NONSTANDARD_SERVICE_NAMESPACE)) {
matches |= printServiceRequirements(b);
}
// If there were no requirements for the specified namespace,
// then say so.
if (!matches) {
System.out.println(namespace + " " + EMPTY_MESSAGE);
}
} else {
System.out.println("Bundle " + b.getBundleId() + " is not resolved.");
}
separatorNeeded = true;
}
return null;
}
private static boolean printMatchingRequirements(BundleWiring wiring, Pattern namespace) {
List<BundleWire> wires = wiring.getRequiredWires(null);
Map<BundleRequirement, List<BundleWire>> aggregateReqs = aggregateRequirements(namespace, wires);
List<BundleRequirement> allReqs = wiring.getRequirements(null);
boolean matches = false;
for (BundleRequirement req : allReqs) {
if (matchNamespace(namespace, req.getNamespace())) {
matches = true;
List<BundleWire> providers = aggregateReqs.get(req);
if (providers != null) {
System.out.println(req.getNamespace() + "; "
+ req.getDirectives().get(Constants.FILTER_DIRECTIVE) + " resolved by:");
for (BundleWire wire : providers) {
String msg;
Object keyAttr = wire.getCapability().getAttributes().get(wire.getCapability().getNamespace());
if (keyAttr != null) {
msg = wire.getCapability().getNamespace() + "; "
+ keyAttr + " " + getVersionFromCapability(wire.getCapability());
} else {
msg = wire.getCapability().toString();
}
msg = " " + msg + " from " + wire.getProviderWiring().getBundle();
System.out.println(msg);
}
} else {
System.out.println(req.getNamespace() + "; "
+ req.getDirectives().get(Constants.FILTER_DIRECTIVE) + " " + UNRESOLVED_MESSAGE);
}
}
}
return matches;
}
private static Map<BundleRequirement, List<BundleWire>> aggregateRequirements(
Pattern namespace, List<BundleWire> wires) {
// Aggregate matching capabilities.
Map<BundleRequirement, List<BundleWire>> map = new HashMap<BundleRequirement, List<BundleWire>>();
for (BundleWire wire : wires) {
if (matchNamespace(namespace, wire.getRequirement().getNamespace())) {
List<BundleWire> providers = map.get(wire.getRequirement());
if (providers == null) {
providers = new ArrayList<BundleWire>();
map.put(wire.getRequirement(), providers);
}
providers.add(wire);
}
}
return map;
}
static boolean printServiceRequirements(Bundle b) {
boolean matches = false;
try {
ServiceReference<?>[] refs = b.getServicesInUse();
if ((refs != null) && (refs.length > 0)) {
matches = true;
// Print properties for each service.
for (ServiceReference<?> ref : refs) {
// Print object class with "namespace".
System.out.println(
NONSTANDARD_SERVICE_NAMESPACE
+ "; "
+ ShellUtil.getValueString(ref.getProperty("objectClass"))
+ " provided by:");
System.out.println(" " + ref.getBundle());
}
}
} catch (Exception ex) {
System.err.println(ex.toString());
}
return matches;
}
private static String getVersionFromCapability(BundleCapability c) {
Object o = c.getAttributes().get(Constants.VERSION_ATTRIBUTE);
if (o == null) {
o = c.getAttributes().get(Constants.BUNDLE_VERSION_ATTRIBUTE);
}
return (o == null) ? "" : o.toString();
}
private static boolean matchNamespace(Pattern namespace, String actual) {
return namespace.matcher(actual).matches();
}
}