/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2001 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.metadata;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.reporting.engine.classic.core.metadata.parser.DataFactoryMetaDataCollection;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import java.io.IOException;
import java.net.URL;
import java.util.LinkedHashMap;
public class DataFactoryRegistry {
private static final Log logger = LogFactory.getLog( DataFactoryRegistry.class );
private static DataFactoryRegistry instance;
private LinkedHashMap<String, DataFactoryMetaData> backend;
private ResourceManager resourceManager;
public static synchronized DataFactoryRegistry getInstance() {
if ( instance == null ) {
instance = new DataFactoryRegistry();
}
return instance;
}
private DataFactoryRegistry() {
this.resourceManager = new ResourceManager();
this.backend = new LinkedHashMap<String, DataFactoryMetaData>();
}
public void registerFromXml( final URL dataFactoryMetaSource ) throws IOException {
if ( dataFactoryMetaSource == null ) {
throw new NullPointerException( "Error: Could not find the data-factory meta-data description file" );
}
try {
final Resource resource =
resourceManager.createDirectly( dataFactoryMetaSource, DataFactoryMetaDataCollection.class );
final DataFactoryMetaDataCollection typeCollection = (DataFactoryMetaDataCollection) resource.getResource();
final DataFactoryMetaData[] types = typeCollection.getFactoryMetaData();
for ( int i = 0; i < types.length; i++ ) {
final DataFactoryMetaData metaData = types[i];
if ( metaData != null ) {
register( metaData );
}
}
} catch ( Exception e ) {
DataFactoryRegistry.logger.error( "Failed:", e );
throw new IOException( "Error: Could not parse the element meta-data description file" );
}
}
public void unregister( final DataFactoryMetaData metaData ) {
if ( metaData == null ) {
throw new NullPointerException();
}
this.backend.remove( metaData.getName() );
}
public void register( final DataFactoryMetaData metaData ) {
if ( metaData == null ) {
throw new NullPointerException();
}
this.backend.put( metaData.getName(), metaData );
}
public DataFactoryMetaData[] getAll() {
return backend.values().toArray( new DataFactoryMetaData[backend.size()] );
}
public boolean isRegistered( final String identifier ) {
if ( identifier == null ) {
throw new NullPointerException();
}
return backend.containsKey( identifier );
}
public DataFactoryMetaData getMetaData( final String identifier ) throws MetaDataLookupException {
if ( identifier == null ) {
throw new NullPointerException();
}
final DataFactoryMetaData retval = backend.get( identifier );
if ( retval == null ) {
throw new MetaDataLookupException( "Unable to locate metadata for data-factory type " + identifier );
}
return retval;
}
}