package com.mossle.bpm.cmd;
import java.util.ArrayList;
import java.util.List;
import org.activiti.engine.delegate.Expression;
import org.activiti.engine.impl.bpmn.parser.BpmnParse;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.form.DefaultFormHandler;
import org.activiti.engine.impl.interceptor.Command;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.ProcessDefinitionEntity;
import org.activiti.engine.impl.pvm.PvmActivity;
import org.activiti.engine.impl.pvm.PvmTransition;
import org.activiti.engine.impl.pvm.process.ActivityImpl;
import org.activiti.engine.impl.task.TaskDefinition;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class FindPreviousActivitiesCmd implements Command<List<PvmActivity>> {
private static Logger logger = LoggerFactory
.getLogger(FindPreviousActivitiesCmd.class);
private String processDefinitionId;
private String activityId;
public FindPreviousActivitiesCmd(String processDefinitionId,
String activityId) {
this.processDefinitionId = processDefinitionId;
this.activityId = activityId;
}
public List<PvmActivity> execute(CommandContext commandContext) {
ProcessDefinitionEntity processDefinitionEntity = Context
.getProcessEngineConfiguration().getDeploymentManager()
.findDeployedProcessDefinitionById(processDefinitionId);
if (processDefinitionEntity == null) {
throw new IllegalArgumentException(
"cannot find processDefinition : " + processDefinitionId);
}
ActivityImpl activity = processDefinitionEntity
.findActivity(activityId);
return this.getPreviousActivities(activity);
}
public List<PvmActivity> getPreviousActivities(PvmActivity pvmActivity) {
List<PvmActivity> pvmActivities = new ArrayList<PvmActivity>();
for (PvmTransition pvmTransition : pvmActivity.getIncomingTransitions()) {
PvmActivity targetActivity = pvmTransition.getDestination();
if ("userTask".equals(pvmActivity.getProperty("type"))) {
pvmActivities.add(targetActivity);
} else {
pvmActivities
.addAll(this.getPreviousActivities(targetActivity));
}
}
return pvmActivities;
}
}