webconsole/src/main/java/org/apache/felix/webconsole/internal/core/ServicesUsedInfoProvider.java

/*
 * 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.webconsole.internal.core;


import java.text.MessageFormat;
import java.util.Arrays;
import java.util.Locale;

import org.apache.felix.webconsole.bundleinfo.BundleInfo;
import org.apache.felix.webconsole.bundleinfo.BundleInfoProvider;
import org.apache.felix.webconsole.bundleinfo.BundleInfoType;
import org.apache.felix.webconsole.i18n.LocalizationHelper;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;


final class ServicesUsedInfoProvider implements BundleInfoProvider
{

    private final LocalizationHelper localization;


    ServicesUsedInfoProvider( Bundle bundle )
    {
        localization = new LocalizationHelper( bundle );
    }


    /*
     * (non-Javadoc)
     *
     * @see
     * org.apache.felix.webconsole.bundleinfo.BundleInfoProvider#getName(java
     * .util.Locale)
     */
    public String getName( Locale locale )
    {
        return localization.getResourceBundle( locale ).getString( "services.info.name" ); //$NON-NLS-1$;
    }


    public BundleInfo[] getBundleInfo( Bundle bundle, String webConsoleRoot, Locale locale )
    {
        final ServiceReference[] refs = bundle.getServicesInUse();
        if ( null == refs || refs.length == 0 )
            return NO_INFO;

        BundleInfo[] ret = new BundleInfo[refs.length];
        for ( int i = 0; i < refs.length; i++ )
        {
            ret[i] = toInfo( refs[i], webConsoleRoot, locale );
        }
        return ret;
    }


    private BundleInfo toInfo( ServiceReference ref, String webConsoleRoot, Locale locale )
    {
        final String[] classes = ( String[] ) ref.getProperty( Constants.OBJECTCLASS );
        final Object id = ref.getProperty( Constants.SERVICE_ID );
        final String descr = localization.getResourceBundle( locale ).getString( "services.info.descr" ); //$NON-NLS-1$;
        String name = localization.getResourceBundle( locale ).getString( "services.info.key" ); //$NON-NLS-1$;
        name = MessageFormat.format( name, new Object[]
            { id, Arrays.asList( classes ).toString() } );
        if ( webConsoleRoot == null )
        {
            return new BundleInfo( name, id, BundleInfoType.VALUE, descr );
        }
        return new BundleInfo( name, webConsoleRoot + "/services/" + id, //$NON-NLS-1$
            BundleInfoType.LINK, descr );
    }


    ServiceRegistration register( BundleContext context )
    {
        return context.registerService( BundleInfoProvider.class.getName(), this, null );
    }

}