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package org.apache.maven.repository.internal;
/*
* 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 java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.util.Collections;
import java.util.Map;
import org.apache.maven.artifact.repository.metadata.Metadata;
import org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Reader;
import org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Writer;
import org.codehaus.plexus.util.IOUtil;
import org.codehaus.plexus.util.ReaderFactory;
import org.codehaus.plexus.util.WriterFactory;
import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
import org.eclipse.aether.RepositoryException;
import org.eclipse.aether.metadata.AbstractMetadata;
import org.eclipse.aether.metadata.MergeableMetadata;
/**
* @author Benjamin Bentmann
*/
abstract class MavenMetadata
extends AbstractMetadata
implements MergeableMetadata
{
static final String MAVEN_METADATA_XML = "maven-metadata.xml";
private final File file;
protected Metadata metadata;
private boolean merged;
protected MavenMetadata( Metadata metadata, File file )
{
this.metadata = metadata;
this.file = file;
}
public String getType()
{
return MAVEN_METADATA_XML;
}
public File getFile()
{
return file;
}
public void merge( File existing, File result )
throws RepositoryException
{
Metadata recessive = read( existing );
merge( recessive );
write( result, metadata );
merged = true;
}
public boolean isMerged()
{
return merged;
}
protected abstract void merge( Metadata recessive );
static Metadata read( File metadataFile )
throws RepositoryException
{
if ( metadataFile.length() <= 0 )
{
return new Metadata();
}
Reader reader = null;
try
{
reader = ReaderFactory.newXmlReader( metadataFile );
return new MetadataXpp3Reader().read( reader, false );
}
catch ( IOException e )
{
throw new RepositoryException( "Could not read metadata " + metadataFile + ": " + e.getMessage(), e );
}
catch ( XmlPullParserException e )
{
throw new RepositoryException( "Could not parse metadata " + metadataFile + ": " + e.getMessage(), e );
}
finally
{
IOUtil.close( reader );
}
}
private void write( File metadataFile, Metadata metadata )
throws RepositoryException
{
Writer writer = null;
try
{
metadataFile.getParentFile().mkdirs();
writer = WriterFactory.newXmlWriter( metadataFile );
new MetadataXpp3Writer().write( writer, metadata );
}
catch ( IOException e )
{
throw new RepositoryException( "Could not write metadata " + metadataFile + ": " + e.getMessage(), e );
}
finally
{
IOUtil.close( writer );
}
}
public Map<String, String> getProperties()
{
return Collections.emptyMap();
}
@Override
public org.eclipse.aether.metadata.Metadata setProperties( Map<String, String> properties )
{
return this;
}
}
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