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Posted to cvs@avalon.apache.org by do...@apache.org on 2002/08/02 11:39:04 UTC
cvs commit: jakarta-avalon-excalibur/containerkit/src/java/org/apache/excalibur/containerkit/kernel MetaDataBuilder.java SimpleMetaDataBuilder.java
donaldp 2002/08/02 02:39:04
Added: containerkit/src/java/org/apache/excalibur/containerkit/kernel
MetaDataBuilder.java SimpleMetaDataBuilder.java
Log:
Add simple abstraction to deal with loading of assembly/configuraiton data.
Needs to be reworked and info removed from it possibly
Revision Changes Path
1.1 jakarta-avalon-excalibur/containerkit/src/java/org/apache/excalibur/containerkit/kernel/MetaDataBuilder.java
Index: MetaDataBuilder.java
===================================================================
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.excalibur.containerkit.kernel;
import org.apache.excalibur.containerkit.metadata.ComponentMetaData;
import org.apache.excalibur.containerkit.factory.ComponentFactory;
/**
* Load metadata from some source. The source is usually
* one or more xml config files.
*
* @author <a href="mailto:peter@apache.org">Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/08/02 09:39:03 $
*/
public interface MetaDataBuilder
{
/**
* Load metadata from a particular source
* defined by location string. The format of
* location string and format of source loaded
* from is left unspecified.
*
* @param location the location of meta data source
* @return the set of components in metadata
* @throws Exception if unable to load or resolve meta
* data for any reason
*/
ComponentMetaData[] loadMetaData( String location,
ComponentFactory factory )
throws Exception;
}
1.1 jakarta-avalon-excalibur/containerkit/src/java/org/apache/excalibur/containerkit/kernel/SimpleMetaDataBuilder.java
Index: SimpleMetaDataBuilder.java
===================================================================
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.excalibur.containerkit.kernel;
import java.util.ArrayList;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.configuration.DefaultConfigurationBuilder;
import org.apache.excalibur.containerkit.factory.ComponentFactory;
import org.apache.excalibur.containerkit.metadata.ComponentMetaData;
import org.apache.excalibur.containerkit.metadata.DependencyMetaData;
import org.apache.excalibur.containerkit.metainfo.ComponentInfo;
import org.xml.sax.InputSource;
/**
* Load metadata from some source. The source is usually
* one or more xml config files.
*
* @author <a href="mailto:peter@apache.org">Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/08/02 09:39:03 $
*/
public class SimpleMetaDataBuilder
implements MetaDataBuilder
{
public ComponentMetaData[] loadMetaData( final String location,
final ComponentFactory factory )
throws Exception
{
final DefaultConfigurationBuilder builder = new DefaultConfigurationBuilder();
final InputSource input = new InputSource( location );
final Configuration configuration = builder.build( input );
final Configuration[] children =
configuration.getChildren( "component" );
return loadComponentDatas( children, factory );
}
private ComponentMetaData[] loadComponentDatas( final Configuration[] components,
final ComponentFactory factory )
throws Exception
{
final ArrayList profiles = new ArrayList();
for( int i = 0; i < components.length; i++ )
{
final ComponentMetaData component =
loadComponentData( components[ i ],factory );
profiles.add( component );
}
return (ComponentMetaData[])profiles.toArray( new ComponentMetaData[ profiles.size() ] );
}
private ComponentMetaData loadComponentData( final Configuration component,
final ComponentFactory factory )
throws Exception
{
final String name = component.getAttribute( "name" );
final String impl = component.getAttribute( "impl" );
final Configuration config = component.getChild( "config" );
final ComponentInfo info = factory.createInfo( impl );
final DependencyMetaData[] dependencies =
parseAssociations( component.getChildren( "provide" ) );
return new ComponentMetaData( name, dependencies, null, config, info );
}
private DependencyMetaData[] parseAssociations( final Configuration[] provides )
throws ConfigurationException
{
final ArrayList associations = new ArrayList();
for( int i = 0; i < provides.length; i++ )
{
final Configuration provide = provides[ i ];
final String role = provide.getAttribute( "role" );
final String provider = provide.getAttribute( "name" );
final DependencyMetaData association = new DependencyMetaData( role, provider );
associations.add( association );
}
return (DependencyMetaData[])associations.toArray( new DependencyMetaData[ associations.size() ] );
}
}
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