package org.apache.maven.execution;

 /*

  * 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.

  */

 import org.apache.maven.artifact.versioning.ArtifactVersion;

 import org.apache.maven.artifact.versioning.DefaultArtifactVersion;

 import org.codehaus.plexus.personality.plexus.lifecycle.phase.Initializable;

 import org.codehaus.plexus.personality.plexus.lifecycle.phase.InitializationException;

 import org.codehaus.plexus.util.IOUtil;

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.Properties;

 /**

  * Describes runtime information about the application.

  *

  * @author <a href="mailto:brett@apache.org">Brett Porter</a>

  * @version $Id: DefaultRuntimeInformation.java 640549 2008-03-24 20:05:11Z bentmann $

  */

 public class DefaultRuntimeInformation

     implements RuntimeInformation, Initializable

 {

     private static final String MAVEN_GROUPID = "org.apache.maven";

     private static final String MAVEN_PROPERTIES = "META-INF/maven/" + MAVEN_GROUPID + "/maven-core/pom.properties";

     private ArtifactVersion applicationVersion;

     public ArtifactVersion getApplicationVersion()

     {

         return applicationVersion;

     }

     public void initialize()

         throws InitializationException

     {

         InputStream resourceAsStream = null;

         try

         {

             Properties properties = new Properties();

             resourceAsStream = getClass().getClassLoader().getResourceAsStream( MAVEN_PROPERTIES );

             if ( resourceAsStream == null )

             {

                 throw new IllegalStateException( "Unable to find Maven properties in classpath: " + MAVEN_PROPERTIES );

             }

             properties.load( resourceAsStream );

             String property = properties.getProperty( "version" );

             if ( property == null )

             {

                 throw new InitializationException( "maven-core properties did not include the version" );

             }

             applicationVersion = new DefaultArtifactVersion( property );

         }

         catch ( IOException e )

         {

             throw new InitializationException( "Unable to read properties file from maven-core", e );

         }

         finally

         {

             IOUtil.close( resourceAsStream );

         }

     }

 }