Examples of org.apache.avalon.meta.info.ServiceDescriptor

org.apache.avalon.meta.info.ServiceDescriptor
This descriptor defines the type of service offerend or required by a component. The type corresponds to the class name of the class/interface implemented by component. Associated with each classname is a version object so that different versions of same interface can be represented.
Also associated with each service is a set of arbitrary attributes that can be used to store extra information about service. See {@link InfoDescriptor} for exampleof how to declare the container specific attributes.

Possible uses for the attributes are to declare a service as "stateless", "pass-by-value", "remotable" or even to attach attributes such as security or transaction constraints. These attributes are container specific and should not be relied upon to work in all containers.
@author Avalon Development Team @version $Revision: 1.1.1.1 $ $Date: 2003/09/24 08:15:09 $

        }


        writer.write( "\n  <services>" );
        for( int i = 0; i < services.length; i++ )
        {
            final ServiceDescriptor service = services[ i ];
            writer.write( "\n    <service type=\"" );
            writer.write( service.getReference().getClassname() );
            if( service.getReference().getVersion().getMajor() > -1 )
            {
                writer.write( "\" version=\"" );
                writer.write( service.getReference().getVersion().toString() );
            }
            final int count = service.getAttributeNames().length;
            if( 0 == count )
            {
                writer.write( "\"/>" );
            }
            else

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        final Configuration[] elements = servicesSet.getChildren( "service" );
        final ArrayList services = new ArrayList();


        for( int i = 0; i < elements.length; i++ )
        {
            final ServiceDescriptor service = buildService( elements[ i ] );
            services.add( service );
        }


        return (ServiceDescriptor[])services.toArray( new ServiceDescriptor[ 0 ] );
    }

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        throws BuildException
    {
        ReferenceDescriptor reference = buildReferenceDescriptor( service );
        final Properties attributes =
            buildAttributes( service.getChild( "attributes" ) );
        return new ServiceDescriptor( reference, attributes );
    }

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        final String value = getNamedParameter( tag, TYPE_PARAM );
        final String type = resolveType( value );
        final String versionString = getNamedParameter( tag, VERSION_PARAM, null );
        final Version version = resolveVersion( versionString, value );
        final ReferenceDescriptor ref = new ReferenceDescriptor( type, version );
        return new ServiceDescriptor( ref, null );
    }

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