me.kafeitu.activiti.extra.helper.ProcessDefinitionHelper.java Source code

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Here is the source code for me.kafeitu.activiti.extra.helper.ProcessDefinitionHelper.java

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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 me.kafeitu.activiti.extra.helper;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.activiti.engine.impl.RepositoryServiceImpl;
import org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior;
import org.activiti.engine.impl.persistence.entity.ProcessDefinitionEntity;
import org.activiti.engine.impl.pvm.delegate.ActivityBehavior;
import org.activiti.engine.impl.pvm.process.ActivityImpl;
import org.activiti.engine.impl.task.TaskDefinition;
import org.activiti.engine.repository.ProcessDefinition;
import org.apache.commons.io.FileUtils;

/**
 * ?
 * 
 * @author henryyan
 */
public class ProcessDefinitionHelper extends AbstractHelper {

    /**
     * ????
     * 
     * @param processDefinitionKey
     *          ?Key
     * @return Map<??, ??>
     */
    public Map<String, String> getUserTaskKeysByProcessDefinitionKey(String processDefinitionKey) {
        Map<String, String> keys = new HashMap<String, String>();
        List<ProcessDefinition> definitions = repositoryService.createProcessDefinitionQuery()
                .processDefinitionKey(processDefinitionKey).list();
        for (ProcessDefinition processDefinition : definitions) {
            ProcessDefinitionEntity processDefinitionEntity = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService)
                    .getDeployedProcessDefinition(processDefinition.getId());
            List<ActivityImpl> activitiList = processDefinitionEntity.getActivities();

            setSingleUserTaskActivity(keys, activitiList);
        }
        return keys;
    }

    /**
     * ????
     * 
     * @param processDefinitionId
     *          ?ID
     * @return Map<??, ??>
     */
    public Map<String, String> getUserTaskKeysByProcessDefinitionId(String processDefinitionId) {
        Map<String, String> keys = new HashMap<String, String>();
        ProcessDefinitionEntity processDefinitionEntity = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService)
                .getDeployedProcessDefinition(processDefinitionId);
        List<ActivityImpl> activitiList = processDefinitionEntity.getActivities();

        setSingleUserTaskActivity(keys, activitiList);
        return keys;
    }

    private void setSingleUserTaskActivity(Map<String, String> keys, List<ActivityImpl> activitiList) {
        for (ActivityImpl activity : activitiList) {
            ActivityBehavior activityBehavior = activity.getActivityBehavior();
            if (activityBehavior instanceof UserTaskActivityBehavior) {
                UserTaskActivityBehavior userTaskActivityBehavior = (UserTaskActivityBehavior) activityBehavior;
                TaskDefinition taskDefinition = userTaskActivityBehavior.getTaskDefinition();
                keys.put(taskDefinition.getKey(), taskDefinition.getNameExpression().toString());
            }
        }
    }

    /**
     * 
     * 
     * @return 
     */
    public String exportDiagramToFile(ProcessDefinition processDefinition, String exportDir) throws IOException {
        String diagramResourceName = processDefinition.getDiagramResourceName();
        String key = processDefinition.getKey();
        int version = processDefinition.getVersion();
        String diagramPath = "";

        InputStream resourceAsStream = repositoryService.getResourceAsStream(processDefinition.getDeploymentId(),
                diagramResourceName);
        byte[] b = new byte[resourceAsStream.available()];

        @SuppressWarnings("unused")
        int len = -1;
        resourceAsStream.read(b, 0, b.length);

        // create file if not exist
        String diagramDir = exportDir + "/" + key + "/" + version;
        File diagramDirFile = new File(diagramDir);
        if (!diagramDirFile.exists()) {
            diagramDirFile.mkdirs();
        }
        if (diagramResourceName.contains("/")) {
            diagramResourceName = diagramResourceName.replaceAll("/", ".");
        }
        diagramPath = diagramDir + "/" + diagramResourceName;
        File file = new File(diagramPath);

        // 
        if (file.exists()) {
            // ????(????)
            logger.debug("diagram exist, ignore... : {}", diagramPath);
            return diagramPath;
        } else {
            file.createNewFile();
        }

        logger.debug("export diagram to : {}", diagramPath);

        // wirte bytes to file
        FileUtils.writeByteArrayToFile(file, b, true);
        return diagramPath;
    }

}