/*! ******************************************************************************
*
* Pentaho Data Integration
*
* Copyright (C) 2002-2015 by Pentaho : http://www.pentaho.com
*
*******************************************************************************
*
* Licensed 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.pentaho.di.core.compress;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.pentaho.di.core.plugins.PluginInterface;
import org.pentaho.di.core.plugins.PluginRegistry;
public class CompressionProviderFactory implements CompressionProviderFactoryInterface {
protected static CompressionProviderFactory INSTANCE = new CompressionProviderFactory();
private CompressionProviderFactory() {
}
public static CompressionProviderFactory getInstance() {
return INSTANCE;
}
@Override
public CompressionProvider createCompressionProviderInstance( String name ) {
CompressionProvider provider = null;
List<PluginInterface> providers = getPlugins();
if ( providers != null ) {
for ( PluginInterface plugin : providers ) {
if ( name != null && name.equalsIgnoreCase( plugin.getName() ) ) {
try {
return PluginRegistry.getInstance().loadClass( plugin, CompressionProvider.class );
} catch ( Exception e ) {
provider = null;
}
}
}
}
return provider;
}
@Override
public Collection<CompressionProvider> getCompressionProviders() {
Collection<CompressionProvider> providerClasses = new ArrayList<CompressionProvider>();
List<PluginInterface> providers = getPlugins();
if ( providers != null ) {
for ( PluginInterface plugin : providers ) {
try {
providerClasses.add( PluginRegistry.getInstance().loadClass( plugin, CompressionProvider.class ) );
} catch ( Exception e ) {
// Do nothing here, if we can't load the provider, don't add it to the list
}
}
}
return providerClasses;
}
@Override
public String[] getCompressionProviderNames() {
ArrayList<String> providerNames = new ArrayList<String>();
List<PluginInterface> providers = getPlugins();
if ( providers != null ) {
for ( PluginInterface plugin : providers ) {
try {
CompressionProvider provider = PluginRegistry.getInstance().loadClass( plugin, CompressionProvider.class );
if ( provider != null ) {
providerNames.add( provider.getName() );
}
} catch ( Exception e ) {
// Do nothing here, if we can't load the provider, don't add it to the list
}
}
}
return providerNames.toArray( new String[providerNames.size()] );
}
@Override
public CompressionProvider getCompressionProviderByName( String name ) {
if ( name == null ) {
return null;
}
CompressionProvider foundProvider = null;
List<PluginInterface> providers = getPlugins();
if ( providers != null ) {
for ( PluginInterface plugin : providers ) {
try {
CompressionProvider provider = PluginRegistry.getInstance().loadClass( plugin, CompressionProvider.class );
if ( provider != null && name.equals( provider.getName() ) ) {
foundProvider = provider;
}
} catch ( Exception e ) {
// Do nothing here, if we can't load the provider, don't add it to the list
}
}
}
return foundProvider;
}
protected List<PluginInterface> getPlugins() {
return PluginRegistry.getInstance().getPlugins( CompressionPluginType.class );
}
}