直接修改jpbm xml流程定义字段的方法

找到了一个直接修改流程定义字段的方法。

package org.jbpm.pvm.internal.cmd;

import java.io.IOException;
import java.io.InputStream;

import org.jbpm.api.JbpmException;
import org.jbpm.api.cmd.Command;
import org.jbpm.api.cmd.Environment;
import org.jbpm.pvm.internal.session.RepositorySession;
import org.jbpm.pvm.internal.util.IoUtil;

/**
 * @author Tom Baeyens
 */
public class UpdateDeploymentResourceCmd implements Command<Void> {

  private static final long serialVersionUID = 1L;

  protected String deploymentId;
  protected String resourceName;
  protected byte[] bytes;

  public UpdateDeploymentResourceCmd(String deploymentId, String resourceName,
    InputStream inputStream) {
    this.deploymentId = deploymentId;
    this.resourceName = resourceName;
    try {
      bytes = IoUtil.readBytes(inputStream);
    }
    catch (IOException e) {
      throw new JbpmException("could not read resource: " + resourceName, e);
    }
    finally {
      IoUtil.close(inputStream);
    }
  }

  public Void execute(Environment environment) throws Exception {
    RepositorySession repositorySession = environment.get(RepositorySession.class);
    repositorySession.updateDeploymentResource(deploymentId, resourceName, bytes);
    return null;
  }

}