src/org/apache/osgi/bundle/shell/PackagesCommandImpl.java

/*
 *   Copyright 2005 The Apache Software Foundation
 *
 *   Licensed 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.osgi.bundle.shell;

import java.io.PrintStream;
import java.util.StringTokenizer;

import org.apache.osgi.service.shell.Command;
import org.osgi.framework.*;
import org.osgi.service.packageadmin.ExportedPackage;
import org.osgi.service.packageadmin.PackageAdmin;

public class PackagesCommandImpl implements Command
{
    private BundleContext m_context = null;

    public PackagesCommandImpl(BundleContext context)
    {
        m_context = context;
    }

    public String getName()
    {
        return "packages";
    }

    public String getUsage()
    {
        return "packages [<id> ...]";
    }

    public String getShortDescription()
    {
        return "list exported packages.";
    }

    public void execute(String s, PrintStream out, PrintStream err)
    {
        // Get package admin service.
        ServiceReference ref = m_context.getServiceReference(
            org.osgi.service.packageadmin.PackageAdmin.class.getName());
        if (ref == null)
        {
            out.println("PackageAdmin service is unavailable.");
            return;
        }

        PackageAdmin pa = (PackageAdmin) m_context.getService(ref);
        if (pa == null)
        {
            out.println("PackageAdmin service is unavailable.");
            return;
        }

        // Parse command line.
        StringTokenizer st = new StringTokenizer(s, " ");

        // Ignore the command name.
        st.nextToken();

        if (st.hasMoreTokens())
        {
            while (st.hasMoreTokens())
            {
                String id = st.nextToken();
                try
                {
                    long l = Long.parseLong(id);
                    Bundle bundle = m_context.getBundle(l);
                    ExportedPackage[] exports = pa.getExportedPackages(bundle);
                    printExports(out, bundle, exports);
                }
                catch (NumberFormatException ex)
                {
                    err.println("Unable to parse id '" + id + "'.");
                }
                catch (Exception ex)
                {
                    err.println(ex.toString());
                }
            }
        }
        else
        {
            ExportedPackage[] exports = pa.getExportedPackages((Bundle) null);
            printExports(out, null, exports);
        }
    }

    private void printExports(PrintStream out, Bundle target, ExportedPackage[] exports)
    {
        if ((exports != null) && (exports.length > 0))
        {
            for (int i = 0; i < exports.length; i++)
            {
                Bundle bundle = exports[i].getExportingBundle();
                out.print(Util.getBundleName(bundle));
                out.println(": " + exports[i]);
            }
        }
        else
        {
            out.println(Util.getBundleName(target)
                + ": No active exported packages.");
        }
    }
}