org.camunda.bpm.engine.impl.cmd.GetTaskVariablesCmd Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of camunda-engine Show documentation

There is a newer version: 7.23.0-alpha2

/* 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.camunda.bpm.engine.impl.cmd;

import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.camunda.bpm.engine.ProcessEngineException;
import org.camunda.bpm.engine.impl.context.Context;
import org.camunda.bpm.engine.impl.interceptor.Command;
import org.camunda.bpm.engine.impl.interceptor.CommandContext;
import org.camunda.bpm.engine.impl.persistence.entity.TaskEntity;
import org.camunda.bpm.engine.impl.util.EnsureUtil;

import static org.camunda.bpm.engine.impl.util.EnsureUtil.*;


/**
 * @author Tom Baeyens
 */
public class GetTaskVariablesCmd implements Command>, Serializable {

  private static final long serialVersionUID = 1L;
  protected String taskId;
  protected Collection variableNames;
  protected boolean isLocal;

  public GetTaskVariablesCmd(String taskId, Collection variableNames, boolean isLocal) {
    this.taskId = taskId;
    this.variableNames = variableNames;
    this.isLocal = isLocal;
  }

  public Map execute(CommandContext commandContext) {
    ensureNotNull("taskId", taskId);

    TaskEntity task = Context
      .getCommandContext()
      .getTaskManager()
      .findTaskById(taskId);

    ensureNotNull("task " + taskId + " doesn't exist", "task", task);

    Map taskVariables;
    if (isLocal) {
      taskVariables = task.getVariablesLocal();
    } else {
      taskVariables = task.getVariables();
    }

    if (variableNames == null) {
      variableNames = taskVariables.keySet();
    }

    // this copy is made to avoid lazy initialization outside a command context
    Map variables = new HashMap();
    for (String variableName : variableNames) {
      variables.put(variableName, task.getVariable(variableName));
    }

    return variables;
  }
}