org.flowable.engine.impl.cmd.GetTaskFormCmd Maven / Gradle / Ivy

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/* 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.flowable.engine.impl.cmd;

import java.io.Serializable;

import org.flowable.common.engine.api.FlowableException;
import org.flowable.common.engine.api.FlowableObjectNotFoundException;
import org.flowable.common.engine.impl.interceptor.Command;
import org.flowable.common.engine.impl.interceptor.CommandContext;
import org.flowable.engine.compatibility.Flowable5CompatibilityHandler;
import org.flowable.engine.form.TaskFormData;
import org.flowable.engine.impl.cfg.ProcessEngineConfigurationImpl;
import org.flowable.engine.impl.form.FormHandlerHelper;
import org.flowable.engine.impl.form.TaskFormHandler;
import org.flowable.engine.impl.util.CommandContextUtil;
import org.flowable.engine.impl.util.Flowable5Util;
import org.flowable.task.api.Task;
import org.flowable.task.service.impl.persistence.entity.TaskEntity;

/**
 * @author Tom Baeyens
 * @author Joram Barrez
 */
public class GetTaskFormCmd implements Command, Serializable {

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

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

    @Override
    public TaskFormData execute(CommandContext commandContext) {
        ProcessEngineConfigurationImpl processEngineConfiguration = CommandContextUtil.getProcessEngineConfiguration(commandContext);
        TaskEntity task = processEngineConfiguration.getTaskServiceConfiguration().getTaskService().getTask(taskId);
        if (task == null) {
            throw new FlowableObjectNotFoundException("No task found for taskId '" + taskId + "'", Task.class);
        }
        
        if (task.getProcessDefinitionId() != null && Flowable5Util.isFlowable5ProcessDefinitionId(commandContext, task.getProcessDefinitionId())) {
            Flowable5CompatibilityHandler compatibilityHandler = Flowable5Util.getFlowable5CompatibilityHandler();
            return compatibilityHandler.getTaskFormData(taskId);
        }

        FormHandlerHelper formHandlerHelper = processEngineConfiguration.getFormHandlerHelper();
        TaskFormHandler taskFormHandler = formHandlerHelper.getTaskFormHandlder(task);
        if (taskFormHandler == null) {
            throw new FlowableException("No taskFormHandler specified for task '" + taskId + "'");
        }

        return taskFormHandler.createTaskForm(task);
    }

}