/* 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.util.workspace;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
import org.activiti.bpmn.model.Process;
import org.eclipse.core.resources.IFile;
/**
* Parses BPMN files for process elements.
*
* @author tiesebarrell
*/
public class BpmnProcessParser {
private final IFile bpmnFile;
public BpmnProcessParser(final IFile bpmnFile) {
super();
this.bpmnFile = bpmnFile;
}
public Set<Process> getProcesses() {
final Set<Process> result = new HashSet<Process>();
try {
XMLInputFactory xif = XMLInputFactory.newInstance();
InputStreamReader in = new InputStreamReader(bpmnFile.getContents(), "UTF-8");
XMLStreamReader xtr = xif.createXMLStreamReader(in);
Process currentProcess = null;
while (xtr.hasNext()) {
xtr.next();
if (isProcessStartElement(xtr)) {
currentProcess = new Process();
currentProcess.setId(xtr.getAttributeValue(null, "id"));
} else if (isProcessEndElement(xtr)) {
result.add(currentProcess);
currentProcess = null;
} else {
continue;
}
}
} catch (Exception e) {
// Don't handle, parsing failed.
// TODO: log and show message.
}
return result;
}
private static final boolean isProcessStartElement(final XMLStreamReader xtr) {
return xtr.isStartElement() && "process".equalsIgnoreCase(xtr.getLocalName());
}
private static final boolean isProcessEndElement(final XMLStreamReader xtr) {
return xtr.isEndElement() && "process".equalsIgnoreCase(xtr.getLocalName());
}
}