/*
* 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.obrplugin;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URI;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.codehaus.plexus.util.FileUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
/**
* Clean an OBR repository by finding and removing missing resources.
*
* @requiresProject false
* @goal clean
* @phase clean
*
* @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a>
*/
public class ObrCleanRepo extends AbstractMojo
{
/**
* OBR Repository.
*
* @parameter expression="${obrRepository}"
*/
private String obrRepository;
/**
* Local Repository.
*
* @parameter expression="${localRepository}"
* @required
* @readonly
*/
private ArtifactRepository localRepository;
public void execute()
{
if ( "NONE".equalsIgnoreCase( obrRepository ) || "false".equalsIgnoreCase( obrRepository ) )
{
getLog().info( "Local OBR clean disabled (enable with -DobrRepository)" );
return;
}
try
{
// Compute local repository location
URI repositoryXml = ObrUtils.findRepositoryXml( localRepository.getBasedir(), obrRepository );
if ( !"file".equals( repositoryXml.getScheme() ) )
{
getLog().error( "The repository URI " + repositoryXml + " is not a local file" );
return;
}
File repositoryFile = new File( repositoryXml );
// Check if the file exist
if ( !repositoryFile.exists() )
{
getLog().error( "The repository file " + repositoryFile + " does not exist" );
return;
}
getLog().info( "Cleaning..." );
Document doc = parseFile( repositoryFile, initConstructor() );
Node finalDocument = cleanDocument( doc.getDocumentElement() ); // Analyze existing repository.
if ( finalDocument == null )
{
getLog().info( "Nothing to clean in " + repositoryFile );
}
else
{
writeToFile( repositoryXml, finalDocument ); // Write the new file
getLog().info( "Repository " + repositoryFile + " cleaned" );
}
}
catch ( Exception e )
{
getLog().error( "Exception while cleaning local OBR: " + e.getLocalizedMessage(), e );
}
}
/**
* Analyze the given XML tree (DOM of the repository file) and remove missing resources.
*
* @param elem : the input XML tree
* @return the cleaned XML tree
*/
private Element cleanDocument( Element elem )
{
String localRepoPath = localRepository.getBasedir();
URI baseURI = new File( localRepoPath + '/' ).toURI();
NodeList nodes = elem.getElementsByTagName( "resource" );
List toRemove = new ArrayList();
// First, look for missing resources
for ( int i = 0; i < nodes.getLength(); i++ )
{
Element n = ( Element ) nodes.item( i );
String value = n.getAttribute( "uri" );
URI resource;
try
{
resource = baseURI.resolve( value );
}
catch ( IllegalArgumentException e )
{
getLog().error( "Malformed URL when creating the resource absolute URI : " + e.getMessage() );
return null;
}
if ( "file".equals( resource.getScheme() ) && !new File( resource ).exists() )
{
getLog().info(
"The bundle " + n.getAttribute( "presentationname" ) + " - " + n.getAttribute( "version" )
+ " will be removed" );
toRemove.add( n );
}
}
Date d = new Date();
if ( toRemove.size() > 0 )
{
// Then remove missing resources.
for ( int i = 0; i < toRemove.size(); i++ )
{
elem.removeChild( ( Node ) toRemove.get( i ) );
}
// If we have to remove resources, we need to update 'lastmodified' attribute
SimpleDateFormat format = new SimpleDateFormat( "yyyyMMddHHmmss.SSS" );
d.setTime( System.currentTimeMillis() );
elem.setAttribute( "lastmodified", format.format( d ) );
return elem;
}
return null;
}
/**
* Initialize the document builder from Xerces.
*
* @return DocumentBuilder ready to create new document
* @throws MojoExecutionException : occurs when the instantiation of the document builder fails
*/
private DocumentBuilder initConstructor() throws MojoExecutionException
{
DocumentBuilder constructor = null;
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
try
{
constructor = factory.newDocumentBuilder();
}
catch ( ParserConfigurationException e )
{
getLog().error( "Unable to create a new xml document" );
throw new MojoExecutionException( "Cannot create the Document Builder : " + e.getMessage() );
}
return constructor;
}
/**
* Open an XML file.
*
* @param file : XML file path
* @param constructor DocumentBuilder get from xerces
* @return Document which describes this file
* @throws MojoExecutionException occurs when the given file cannot be opened or is a valid XML file.
*/
private Document parseFile( File file, DocumentBuilder constructor ) throws MojoExecutionException
{
if ( constructor == null )
{
return null;
}
// The document is the root of the DOM tree.
File targetFile = file.getAbsoluteFile();
getLog().info( "Parsing " + targetFile );
Document doc = null;
try
{
doc = constructor.parse( targetFile );
}
catch ( SAXException e )
{
getLog().error( "Cannot parse " + targetFile + " : " + e.getMessage() );
throw new MojoExecutionException( "Cannot parse " + targetFile + " : " + e.getMessage() );
}
catch ( IOException e )
{
getLog().error( "Cannot open " + targetFile + " : " + e.getMessage() );
throw new MojoExecutionException( "Cannot open " + targetFile + " : " + e.getMessage() );
}
return doc;
}
/**
* write a Node in a xml file.
*
* @param outputFilename URI to the output file
* @param treeToBeWrite Node root of the tree to be write in file
* @throws MojoExecutionException if the plugin failed
*/
private void writeToFile( URI outputFilename, Node treeToBeWrite ) throws MojoExecutionException
{
// init the transformer
Transformer transformer = null;
TransformerFactory tfabrique = TransformerFactory.newInstance();
try
{
transformer = tfabrique.newTransformer();
}
catch ( TransformerConfigurationException e )
{
getLog().error( "Unable to write to file: " + outputFilename.toString() );
throw new MojoExecutionException( "Unable to write to file: " + outputFilename.toString() + " : "
+ e.getMessage() );
}
Properties proprietes = new Properties();
proprietes.put( "method", "xml" );
proprietes.put( "version", "1.0" );
proprietes.put( "encoding", "ISO-8859-1" );
proprietes.put( "standalone", "yes" );
proprietes.put( "indent", "yes" );
proprietes.put( "omit-xml-declaration", "no" );
transformer.setOutputProperties( proprietes );
DOMSource input = new DOMSource( treeToBeWrite );
File fichier = null;
FileOutputStream flux = null;
try
{
fichier = File.createTempFile( "repository", ".xml" );
flux = new FileOutputStream( fichier );
}
catch ( IOException e )
{
getLog().error( "Unable to write to file: " + fichier.getName() );
throw new MojoExecutionException( "Unable to write to file: " + fichier.getName() + " : " + e.getMessage() );
}
Result output = new StreamResult( flux );
try
{
transformer.transform( input, output );
}
catch ( TransformerException e )
{
throw new MojoExecutionException( "Unable to write to file: " + outputFilename.toString() + " : "
+ e.getMessage() );
}
try
{
flux.flush();
flux.close();
FileUtils.rename( fichier, new File( outputFilename ) );
}
catch ( IOException e )
{
throw new MojoExecutionException( "IOException when closing file : " + e.getMessage() );
}
}
}