001    /*
002     * Copyright (c) 2005 Stephen J. McConnell
003     *
004     * Licensed  under the  Apache License,  Version 2.0  (the "License");
005     * you may not use  this file  except in  compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *   http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed  under the  License is distributed on an "AS IS" BASIS,
012     * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
013     * implied.
014     *
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package net.dpml.metro.tools;
020    
021    import net.dpml.metro.info.ServiceDescriptor;
022    
023    import net.dpml.lang.Version;
024    
025    import org.apache.tools.ant.BuildException;
026    
027    /**
028     * Declaration of an exported service.
029     *
030     * @author <a href="http://www.dpml.net">Digital Product Meta Library</a>
031     * @version 1.1.0
032     */
033    public class ServiceDataType
034    {
035        private String m_classname;
036        private Version m_version;
037    
038       /**
039        * Set the service classname.
040        * @param classname the name of the service interface class
041        */
042        public void setClass( final String classname )
043        {
044            if( null == classname )
045            {
046                throw new NullPointerException( "classname" );
047            }
048            m_classname = classname;
049        }
050        
051       /**
052        * Set the service version.
053        * @param spec the version value
054        */
055        public void setVersion( final String spec )
056        {
057            if( null == spec )
058            {
059                throw new NullPointerException( "spec" );
060            }
061            m_version = Version.parse( spec );
062        }
063        
064        ServiceDescriptor getServiceDescriptor()
065        {
066            if( null == m_classname )
067            {
068                throw new BuildException( "Missing interface 'class' attribute." );
069            }
070            else
071            {
072                return new ServiceDescriptor( m_classname, m_version );
073            }
074        }
075    }