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package org.openslx.runvirt.plugin.qemu.configuration;
import java.util.ArrayList;
import org.openslx.libvirt.domain.Domain;
import org.openslx.libvirt.domain.device.Parallel;
import org.openslx.libvirt.domain.device.Parallel.Type;
import org.openslx.runvirt.plugin.qemu.cmdln.CommandLineArgs;
import org.openslx.virtualization.configuration.VirtualizationConfigurationQemuUtils;
import org.openslx.virtualization.configuration.transformation.TransformationException;
import org.openslx.virtualization.configuration.transformation.TransformationGeneric;
/**
* Generic parallel device transformation for Libvirt/QEMU virtualization configurations.
*
* @author Manuel Bentele
* @version 1.0
*/
public class TransformationGenericParallelDevices extends TransformationGeneric<Domain, CommandLineArgs>
{
/**
* Name of the configuration transformation.
*/
private static final String NAME = "Parallel devices";
/**
* Creates a new parallel device transformation for Libvirt/QEMU virtualization configurations.
*/
public TransformationGenericParallelDevices()
{
super( TransformationGenericParallelDevices.NAME );
}
/**
* Validates a virtualization configuration and input arguments for this transformation.
*
* @param config virtualization configuration for the validation.
* @param args input arguments for the validation.
* @throws TransformationException validation has failed.
*/
private void validateInputs( Domain config, CommandLineArgs args ) throws TransformationException
{
if ( config == null || args == null ) {
throw new TransformationException( "Virtualization configuration or input arguments are missing!" );
}
}
/**
* Transforms a parallel device in a virtualization configuration selected by its {@code index}.
*
* @param config virtualization configuration for the transformation.
* @param fileName path to the parallel device file on the host system.
* @param index number of the parallel device in the virtualization configuration that is
* selected.
* @throws TransformationException transformation has failed.
*/
private void transformParallelDevice( Domain config, String fileName, int index ) throws TransformationException
{
final ArrayList<Parallel> devices = config.getParallelDevices();
final Parallel device = VirtualizationConfigurationQemuUtils.getArrayIndex( devices, index );
if ( device == null ) {
// check if device file name is specified
if ( fileName != null ) {
// parallel port device does not exist, so create new parallel port device
final Parallel newDevice = config.addParallelDevice();
newDevice.setType( Type.DEV );
newDevice.setSource( fileName );
}
} else {
if ( fileName == null || fileName.isEmpty() ) {
// remove device since device file is not specified
device.remove();
} else {
// change type and source of existing parallel port device
device.setType( Type.DEV );
device.setSource( fileName );
}
}
}
@Override
public void transform( Domain config, CommandLineArgs args ) throws TransformationException
{
// validate configuration and input arguments
this.validateInputs( config, args );
// alter parallel device
this.transformParallelDevice( config, args.getVmDeviceParallel0(), 0 );
// remove all additional parallel devices
final ArrayList<Parallel> devices = config.getParallelDevices();
for ( int i = 1; i < devices.size(); i++ ) {
devices.get( i ).remove();
}
}
}
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