invocationlogimpl.java

一个java工作流引擎

package org.jbpm.model.log.impl;

import java.util.*;

import org.jbpm.*;
import org.jbpm.model.execution.*;
import org.jbpm.model.execution.impl.*;
import org.jbpm.model.log.*;
import org.jbpm.service.*;

public class InvocationLogImpl implements InvocationLog, Comparable {

  private Long id = null;
  private String actorId = null;
  private TokenImpl token = null;
  private Date date = null;
  private ServiceMethod serviceMethod = null;
  private List executionLogs = null;
  private Boolean isUndoable = null;

  public InvocationLogImpl() {}

  public InvocationLogImpl( ServiceMethod serviceMethod ) {
    this.date = new Date();
    this.serviceMethod = serviceMethod;
    if ( ( serviceMethod != ServiceMethod.UNDO )
         && ( serviceMethod != ServiceMethod.START_PROCESS_INSTANCE ) ) {
      this.isUndoable = Boolean.TRUE;
    } else {
      this.isUndoable = Boolean.FALSE;
    }
  }
  
  public InvocationLogImpl( ServiceMethod serviceMethod, String actorId ) {
    this( serviceMethod );
    this.actorId = actorId;
  }

  public InvocationLogImpl( ServiceMethod serviceMethod, String actorId, TokenImpl token ) {
    this( serviceMethod, actorId );
    this.actorId = actorId;
    this.token = token;
    
    // this.assignedActorId = token.getActorId();
    // this.stateBeforeInvocation = (StateImpl) token.getState();
  }

  public Long getId() { return this.id; }
	public void setId(Long id) { this.id = id; }

  public String getActorId() { return this.actorId; }
  public void setActorId(String actorId) { this.actorId = actorId; }

	public Token getToken() { return this.token; }
	public void setToken(TokenImpl token) { this.token = token; }

  public ProcessInstance getProcessInstance() {
    ProcessInstance processInstance = null;
    if ( token != null ) {
      processInstance = token.getProcessInstance(); 
    }
    return processInstance;
  }

  public Date getDate() { return this.date; }
	public void setDate(Date date) { this.date = date; }
  
	public ServiceMethod getServiceMethod() { return this.serviceMethod; }
	public void setServiceMethod(ServiceMethod serviceMethod) { this.serviceMethod = serviceMethod; }

  public List getExecutionLogs() { return this.executionLogs; }
  public void setExecutionLogs(List executionLogs) { this.executionLogs = executionLogs; }
  public void addExecutionLog( ExecutionLogImpl log ) {
    if ( executionLogs == null ) {
      executionLogs = new ArrayList();
    }
    log.setInvocationLog( this );
    log.setIndex( new Integer( executionLogs.size() ) );
    executionLogs.add( log );
  }

  public Boolean getIsUndoable() { return this.isUndoable; }
  public void setIsUndoable(Boolean isUndoable) { this.isUndoable = isUndoable; }  
  
  public int compareTo(Object o) {
		return date.compareTo( ((InvocationLogImpl)o).date );
	}
  
	public void undo(ExecutionContextImpl executionContext) throws ExecutionException {
    // prepare the execution context
    executionContext.setToken( token );

    // loop over all execution logs
    List reversedExecutionLogs = new ArrayList( executionLogs );
    Collections.reverse(reversedExecutionLogs);
    Iterator iter = reversedExecutionLogs.iterator();
		while (iter.hasNext()) {
			ExecutionLogImpl executionLog = (ExecutionLogImpl) iter.next();
      executionLog.undo( executionContext );
		}
    
    // a log can only be undone once...
    isUndoable = Boolean.FALSE;
	}

}