/* 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.activiti.designer.eclipse.ui;
import java.util.ArrayList;
import java.util.Collection;
import org.activiti.designer.eclipse.extension.export.ExportMarshaller;
import org.activiti.designer.eclipse.util.ExtensionPointUtil;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.ISafeRunnable;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.graphiti.mm.pictograms.Diagram;
import org.eclipse.jface.operation.IRunnableWithProgress;
/**
* Runnable that invokes {@link ExportMarshaller}s with progress display.
*
* @author Tiese Barrell
* @since 0.6.0
* @version 1
*/
public class ExportMarshallerRunnable implements IRunnableWithProgress {
/**
* The number of work units allocated to a marshaller.
*/
private static final int WORK_UNITS_PER_MARSHALLER = 100;
private Diagram diagram;
private Collection<ExportMarshaller> marshallers;
public ExportMarshallerRunnable(final Diagram diagram, final Collection<ExportMarshaller> marshallers) {
this.diagram = diagram;
this.marshallers = marshallers;
}
public ExportMarshallerRunnable(final Diagram diagram, final ExportMarshaller marshaller) {
this.diagram = diagram;
this.marshallers = new ArrayList<ExportMarshaller>();
this.marshallers.add(marshaller);
}
public ExportMarshallerRunnable(final Diagram diagram, final String marshallerName) {
this.diagram = diagram;
this.marshallers = new ArrayList<ExportMarshaller>();
final ExportMarshaller marshaller = ExtensionPointUtil.getExportMarshaller(marshallerName);
if (marshaller == null) {
throw new IllegalArgumentException("Unable to invoke ExportMarshaller with name " + marshallerName);
}
this.marshallers.add(marshaller);
}
public void run(IProgressMonitor monitor) {
try {
monitor.beginTask("Saving to additional export formats", marshallers.size() * WORK_UNITS_PER_MARSHALLER + 25);
if (marshallers.size() > 0) {
monitor.worked(25);
for (final ExportMarshaller marshaller : marshallers) {
final IProgressMonitor subMonitor = new SubProgressMonitor(monitor, WORK_UNITS_PER_MARSHALLER);
try {
monitor.subTask(String.format("Saving diagram to %s format", marshaller.getFormatName()));
invokeExportMarshaller(marshaller, diagram, subMonitor);
} finally {
// enforce calling of done() if the client hasn't
// done so itself
subMonitor.done();
}
}
}
} finally {
monitor.done();
}
}
private void invokeExportMarshaller(final ExportMarshaller exportMarshaller, final Diagram diagram, final IProgressMonitor monitor) {
ISafeRunnable runnable = new ISafeRunnable() {
@Override
public void handleException(Throwable exception) {
System.out.println("An exception occurred while running ExportMarshaller " + exportMarshaller.getMarshallerName() + ": " + exception.getMessage());
}
@Override
public void run() throws Exception {
exportMarshaller.marshallDiagram(diagram, monitor);
}
};
SafeRunner.run(runnable);
}
}