Package org.camunda.bpm.engine.impl.cmd

Source Code of org.camunda.bpm.engine.impl.cmd.GetTaskFormCmd

/* 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 org.camunda.bpm.engine.form.TaskFormData;
import org.camunda.bpm.engine.impl.context.Context;
import org.camunda.bpm.engine.impl.form.handler.TaskFormHandler;
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 static org.camunda.bpm.engine.impl.util.EnsureUtil.ensureNotNull;


/**
* @author Tom Baeyens
*/
public class GetTaskFormCmd implements Command<TaskFormData>, Serializable {

  private static final long serialVersionUID = 1L;
  protected String taskId;

  public GetTaskFormCmd(String taskId) {
    this.taskId = taskId;
  }

  public TaskFormData execute(CommandContext commandContext) {
    TaskEntity task = Context
      .getCommandContext()
      .getTaskManager()
      .findTaskById(taskId);
    ensureNotNull("No task found for taskId '" + taskId + "'", "task", task);

    if (task.getTaskDefinition() != null) {
      TaskFormHandler taskFormHandler = task.getTaskDefinition().getTaskFormHandler();
      ensureNotNull("No taskFormHandler specified for task '" + taskId + "'", "taskFormHandler", taskFormHandler);

      return taskFormHandler.createTaskForm(task);
    } else {
      // Standalone task, no TaskFormData available
      return null;
    }
  }

}
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