com.glaf.activiti.web.springmvc.ActivitiProcessImageController.java Source code

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Here is the source code for com.glaf.activiti.web.springmvc.ActivitiProcessImageController.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 com.glaf.activiti.web.springmvc;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import org.activiti.engine.repository.ProcessDefinition;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.glaf.activiti.service.ActivitiDeployQueryService;
import com.glaf.activiti.service.ActivitiDeployService;
import com.glaf.activiti.service.ActivitiProcessQueryService;
import com.glaf.activiti.service.ActivitiTaskQueryService;
import com.glaf.activiti.util.ProcessUtils;

@Controller("/activiti/image")
@RequestMapping("/activiti/image")
public class ActivitiProcessImageController {
    protected final static Log logger = LogFactory.getLog(ActivitiProcessImageController.class);

    protected ActivitiDeployService activitiDeployService;

    protected ActivitiDeployQueryService activitiDeployQueryService;

    protected ActivitiProcessQueryService activitiProcessQueryService;

    protected ActivitiTaskQueryService activitiTaskQueryService;

    @RequestMapping("/image")
    @ResponseBody
    public byte[] image(@RequestParam("deploymentId") String deploymentId) throws IOException {
        ProcessDefinition processDefinition = null;
        logger.debug("deploymentId:" + deploymentId);
        if (StringUtils.isNotEmpty(deploymentId)) {
            processDefinition = activitiProcessQueryService.getProcessDefinitionByDeploymentId(deploymentId);
        }
        if (processDefinition != null) {
            byte[] bytes = null;
            try {
                bytes = ProcessUtils.getImage(processDefinition.getId());
            } catch (Exception e) {
            }
            return bytes;
        }

        return null;
    }

    @javax.annotation.Resource
    public void setActivitiDeployService(ActivitiDeployService activitiDeployService) {
        this.activitiDeployService = activitiDeployService;
    }

    @javax.annotation.Resource
    public void setActivitiDeployQueryService(ActivitiDeployQueryService activitiDeployQueryService) {
        this.activitiDeployQueryService = activitiDeployQueryService;
    }

    @javax.annotation.Resource
    public void setActivitiProcessQueryService(ActivitiProcessQueryService activitiProcessQueryService) {
        this.activitiProcessQueryService = activitiProcessQueryService;
    }

    @javax.annotation.Resource
    public void setActivitiTaskQueryService(ActivitiTaskQueryService activitiTaskQueryService) {
        this.activitiTaskQueryService = activitiTaskQueryService;
    }

    @RequestMapping
    @ResponseBody
    public byte[] showImage(HttpServletRequest request) throws IOException {
        String processDefinitionId = request.getParameter("processDefinitionId");
        String processInstanceId = request.getParameter("processInstanceId");
        ProcessDefinition processDefinition = null;
        logger.debug("processDefinitionId:" + processDefinitionId);
        if (StringUtils.isNotEmpty(processDefinitionId)) {
            processDefinition = activitiProcessQueryService.getProcessDefinition(processDefinitionId);
        } else if (StringUtils.isNotEmpty(processInstanceId)) {
            processDefinition = activitiProcessQueryService
                    .getProcessDefinitionByProcessInstanceId(processInstanceId);
        }
        if (processDefinition != null) {
            byte[] bytes = null;
            try {
                bytes = ProcessUtils.getImage(processDefinition.getId());
            } catch (Exception e) {
            }
            return bytes;
        }

        return null;
    }
}