Package org.activiti.engine.impl.cmd

Source Code of org.activiti.engine.impl.cmd.GetRenderedStartFormCmd

/* 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.activiti.engine.impl.cmd;

import java.io.Serializable;

import org.activiti.engine.ActivitiException;
import org.activiti.engine.ActivitiObjectNotFoundException;
import org.activiti.engine.form.StartFormData;
import org.activiti.engine.impl.form.FormEngine;
import org.activiti.engine.impl.form.StartFormHandler;
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.repository.ProcessDefinition;


/**
* @author Tom Baeyens
* @author Joram Barrez
*/
public class GetRenderedStartFormCmd implements Command<Object>, Serializable {

  private static final long serialVersionUID = 1L;
  protected String processDefinitionId;
  protected String formEngineName;
 
  public GetRenderedStartFormCmd(String processDefinitionId, String formEngineName) {
    this.processDefinitionId = processDefinitionId;
    this.formEngineName = formEngineName;
  }

  public Object execute(CommandContext commandContext) {
    ProcessDefinitionEntity processDefinition = commandContext
      .getProcessEngineConfiguration()
      .getDeploymentManager()
      .findDeployedProcessDefinitionById(processDefinitionId);
    if (processDefinition == null) {
      throw new ActivitiObjectNotFoundException("Process Definition '" + processDefinitionId +"' not found", ProcessDefinition.class);
    }
    StartFormHandler startFormHandler = processDefinition.getStartFormHandler();
    if (startFormHandler == null) {
      return null;
    }
   
    FormEngine formEngine = commandContext
      .getProcessEngineConfiguration()
      .getFormEngines()
      .get(formEngineName);
   
    if (formEngine==null) {
      throw new ActivitiException("No formEngine '" + formEngineName +"' defined process engine configuration");
    }
   
    StartFormData startForm = startFormHandler.createStartFormData(processDefinition);
   
    return formEngine.renderStartForm(startForm);
  }
}
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