/**
* Copyright (c) 2008-2011 Sonatype, Inc.
* All rights reserved. Includes the third-party code listed at http://www.sonatype.com/products/nexus/attributions.
*
* This program is free software: you can redistribute it and/or modify it only under the terms of the GNU Affero General
* Public License Version 3 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License Version 3
* for more details.
*
* You should have received a copy of the GNU Affero General Public License Version 3 along with this program. If not, see
* http://www.gnu.org/licenses.
*
* Sonatype Nexus (TM) Open Source Version is available from Sonatype, Inc. Sonatype and Sonatype Nexus are trademarks of
* Sonatype, Inc. Apache Maven is a trademark of the Apache Foundation. M2Eclipse is a trademark of the Eclipse Foundation.
* All other trademarks are the property of their respective owners.
*/
package org.sonatype.nexus.proxy.maven.metadata;
import java.io.IOException;
import java.io.InputStream;
import org.apache.maven.artifact.repository.metadata.Metadata;
import org.codehaus.plexus.util.IOUtil;
import org.sonatype.nexus.proxy.maven.metadata.operations.MetadataBuilder;
/**
* @author juven
*/
public abstract class AbstractMetadataProcessor
{
protected static final String METADATA_SUFFIX = "/maven-metadata.xml";
protected AbstractMetadataHelper metadataHelper;
public AbstractMetadataProcessor( AbstractMetadataHelper metadataHelper )
{
this.metadataHelper = metadataHelper;
}
/**
* @param path
* @return true if got processed, else false
* @throws Exception
*/
public boolean process( String path )
throws IOException
{
if ( !shouldProcessMetadata( path ) )
{
return false;
}
if ( isMetadataExisted( path ) )
{
Metadata metadata = readMetadata( path );
if ( metadata != null && isMetadataCorrect( metadata, path ) )
{
postProcessMetadata( path );
return true;
}
else
{
removedMetadata( path );
}
}
processMetadata( path );
postProcessMetadata( path );
buildMetadataChecksum( path );
return true;
}
protected boolean isMetadataExisted( String path )
throws IOException
{
return metadataHelper.exists( path + METADATA_SUFFIX );
}
protected Metadata readMetadata( String path )
throws IOException
{
InputStream mdStream = metadataHelper.retrieveContent( path + METADATA_SUFFIX );
try
{
Metadata md = MetadataBuilder.read( mdStream );
return md;
}
catch ( IOException e )
{
if ( metadataHelper.logger.isDebugEnabled() )
{
metadataHelper.logger.info( "Failed to parse metadata from '" + path + "'", e );
}
else
{
metadataHelper.logger.info( "Failed to parse metadata from '" + path + "'" );
}
return null;
}
finally
{
IOUtil.close( mdStream );
}
}
protected void removedMetadata( String path )
throws IOException
{
metadataHelper.remove( path + METADATA_SUFFIX );
}
protected void buildMetadataChecksum( String path )
throws IOException
{
metadataHelper.rebuildChecksum( path + METADATA_SUFFIX );
}
protected abstract boolean isMetadataCorrect( Metadata metadata, String path )
throws IOException;
protected abstract boolean shouldProcessMetadata( String path );
protected abstract void processMetadata( String path )
throws IOException;
protected abstract void postProcessMetadata( String path );
}