修复issue反馈的问题

dbswitch-admin-ui/src/views/connection/driver.vue

@@ -41,17 +41,14 @@
             </template>
             <el-table-column property="driverVersion"
                              label="驱动版本号"
-                             min-width="15%"></el-table-column>
+                             min-width="30%"></el-table-column>
             <el-table-column property="driverClass"
                              label="驱动类名"
-                             min-width="20%"></el-table-column>
+                             min-width="30%"></el-table-column>
             <el-table-column property="jarFiles"
                              :formatter="formatJarFileList"
                              label="驱动JAR名称"
-                             min-width="30%"></el-table-column>
+                             min-width="40%"></el-table-column>
-            <el-table-column property="driverPath"
-                             label="驱动版本路径"
-                             min-width="50%"></el-table-column>
 
           </el-table>
         </div>

dbswitch-admin/src/main/java/com/gitee/dbswitch/admin/service/AssignmentService.java

@@ -9,7 +9,6 @@
 /////////////////////////////////////////////////////////////
 package com.gitee.dbswitch.admin.service;
 
-import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.gitee.dbswitch.admin.common.exception.DbswitchException;
 import com.gitee.dbswitch.admin.common.response.PageResult;
 import com.gitee.dbswitch.admin.common.response.Result;
@@ -18,13 +17,13 @@ import com.gitee.dbswitch.admin.controller.converter.AssignmentDetailConverter;
 import com.gitee.dbswitch.admin.controller.converter.AssignmentInfoConverter;
 import com.gitee.dbswitch.admin.controller.converter.AssignmentsConverter;
 import com.gitee.dbswitch.admin.dao.AssignmentConfigDAO;
+import com.gitee.dbswitch.admin.dao.AssignmentJobDAO;
 import com.gitee.dbswitch.admin.dao.AssignmentTaskDAO;
 import com.gitee.dbswitch.admin.dao.DatabaseConnectionDAO;
 import com.gitee.dbswitch.admin.entity.AssignmentConfigEntity;
 import com.gitee.dbswitch.admin.entity.AssignmentJobEntity;
 import com.gitee.dbswitch.admin.entity.AssignmentTaskEntity;
 import com.gitee.dbswitch.admin.entity.DatabaseConnectionEntity;
-import com.gitee.dbswitch.admin.mapper.AssignmentJobMapper;
 import com.gitee.dbswitch.admin.model.request.AssigmentCreateRequest;
 import com.gitee.dbswitch.admin.model.request.AssigmentUpdateRequest;
 import com.gitee.dbswitch.admin.model.request.AssignmentSearchRequest;
@@ -64,6 +63,9 @@ public class AssignmentService {
   @Resource
   private AssignmentConfigDAO assignmentConfigDAO;
 
+  @Resource
+  private AssignmentJobDAO assignmentJobDAO;
+
   @Resource
   private ScheduleService scheduleService;
 
@@ -73,9 +75,6 @@ public class AssignmentService {
   @Resource
   private DriverLoadService driverLoadService;
 
-  @Resource
-  private AssignmentJobMapper assignmentJobMapper;
-
   @Transactional(rollbackFor = Exception.class)
   public AssignmentInfoResponse createAssignment(AssigmentCreateRequest request) {
     AssignmentTaskEntity assignment = request.toAssignmentTask();
@@ -351,30 +350,26 @@ public class AssignmentService {
       AssignmentsDataResponse assignmentsDataResponse = ConverterFactory.getConverter(AssignmentsConverter.class)
           .convert(assignmentTaskEntity);
 
-      AssignmentConfigEntity assignmentConfigEntity = this.assignmentConfigDAO.getByAssignmentTaskId(id);
+      AssignmentConfigEntity assignmentConfigEntity = assignmentConfigDAO.getByAssignmentTaskId(id);
 
       Long sourceConnectionId = assignmentConfigEntity.getSourceConnectionId();
-      DatabaseConnectionEntity databaseConnectionEntity = this.databaseConnectionDAO.getById(sourceConnectionId);
+      DatabaseConnectionEntity databaseConnectionEntity = databaseConnectionDAO.getById(sourceConnectionId);
       String sourceSchema = assignmentConfigEntity.getSourceSchema();
       assignmentsDataResponse.setSourceSchema(sourceSchema);
       String sourceType = databaseConnectionEntity.getType().getName();
       assignmentsDataResponse.setSourceType(sourceType);
 
       Long targetConnectionId = assignmentConfigEntity.getTargetConnectionId();
-      DatabaseConnectionEntity databaseConnectionEntity1 = this.databaseConnectionDAO.getById(targetConnectionId);
+      DatabaseConnectionEntity databaseConnectionEntity1 = databaseConnectionDAO.getById(targetConnectionId);
       String targetSchema = assignmentConfigEntity.getTargetSchema();
       assignmentsDataResponse.setTargetSchema(targetSchema);
       String targetType = databaseConnectionEntity1.getType().getName();
       assignmentsDataResponse.setTargetType(targetType);
 
-      AssignmentJobEntity assignmentJobEntity = this.assignmentJobMapper.selectOne(
+      AssignmentJobEntity assignmentJobEntity = assignmentJobDAO.getLatestJobEntity(id);
-          new LambdaQueryWrapper<AssignmentJobEntity>()
+      Integer status = (assignmentJobEntity == null || assignmentJobEntity.getStatus() == null)
-              .eq(AssignmentJobEntity::getAssignmentId, assignmentsDataResponse.getId())
+          ? JobStatusEnum.INIT.getValue()
-              .orderByDesc(AssignmentJobEntity::getCreateTime)
+          : assignmentJobEntity.getStatus();
-              .last(" limit 1 "));
-      Integer status = (assignmentJobEntity == null || assignmentJobEntity.getStatus() == null) ?
-          JobStatusEnum.INIT.getValue() :
-          assignmentJobEntity.getStatus();
       assignmentsDataResponse.setRunStatus(JobStatusEnum.of(status).getName());
       assignmentsDataResponses.add(assignmentsDataResponse);
     }

dbswitch-admin/src/main/resources/index.html

@@ -1 +1 @@
-<!DOCTYPE html><html><head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><title>异构数据迁移工具</title><link href=/static/css/app.48fb2adc31db789f5ffbeccb7b71c011.css rel=stylesheet></head><body><div id=app></div><script type=text/javascript src=/static/js/manifest.125e7b77fc066142d0ea.js></script><script type=text/javascript src=/static/js/vendor.8200341f98478c8f7552.js></script><script type=text/javascript src=/static/js/app.36911b44fc7ed34e7641.js></script></body></html>
+<!DOCTYPE html><html><head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><title>异构数据迁移工具</title><link href=/static/css/app.f0e8b5065a7b737d46659aa49052e78a.css rel=stylesheet></head><body><div id=app></div><script type=text/javascript src=/static/js/manifest.abc11e34d797dee7d4d2.js></script><script type=text/javascript src=/static/js/vendor.8200341f98478c8f7552.js></script><script type=text/javascript src=/static/js/app.36911b44fc7ed34e7641.js></script></body></html>

dbswitch-admin/src/main/resources/static/js/19.b1e6da86c8a7dcf8425b.js

@@ -1,2 +0,0 @@
-webpackJsonp([19],{WfA7:function(t,e,i){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var a={data:function(){return{dialogVisible:!1,loading:!0,connectionTypes:[],versionDrivers:[],isActive:-1}},methods:{loadConnectionTypes:function(){var t=this;this.$http({method:"GET",url:"/dbswitch/admin/api/v1/connection/types"}).then(function(e){0===e.data.code?(t.connectionTypes=e.data.data,t.handleChooseClick("MYSQL",0)):e.data.message&&alert("初始化数据库类型信息失败:"+e.data.message)})},handleChooseClick:function(t,e){var i=this;this.isActive=e,this.$http.get("/dbswitch/admin/api/v1/connection/"+t+"/drivers").then(function(t){0===t.data.code?i.versionDrivers=t.data.data:t.data.message&&alert("查询驱动版本信息失败,"+t.data.message)})},handleClose:function(t){this.$confirm("确认关闭？").then(function(e){t()}).catch(function(t){})},formatJarFileList:function(t,e){return t[e.property].join(";\n")}},created:function(){this.loadConnectionTypes()},beforeDestroy:function(){}},n={render:function(){var t=this,e=t.$createElement,i=t._self._c||e;return i("div",[i("el-card",[i("div",{staticClass:"container"},[i("el-card",{staticClass:"box-card"},[i("div",{staticClass:"clearfix",attrs:{slot:"header",align:"center"},slot:"header"},[i("span",[i("b",[t._v("数据库产品类型列表")])])]),t._v(" "),i("div",{staticClass:"navsBox"},[i("el-scrollbar",{staticStyle:{height:"600px"}},[i("ul",t._l(t.connectionTypes,function(e,a){return i("li",{key:a,class:{active:a==t.isActive},on:{click:function(i){return t.handleChooseClick(e.type,a)}}},[t._v("["+t._s(e.id)+"] "+t._s(e.name)+"\n              ")])}),0)])],1)]),t._v(" "),i("div",{staticClass:"contentBox"},[i("div",{staticStyle:{margin:"10px 5px"},attrs:{align:"right",width:"95%"}},[i("el-button",{attrs:{type:"primary",size:"mini",icon:"el-icon-document-add"},on:{click:function(e){t.dialogVisible=!0}}},[t._v("添加\n          ")])],1),t._v(" "),i("el-table",{attrs:{"header-cell-style":{background:"#eef1f6",color:"#606266"},data:t.versionDrivers,size:"small",stripe:"",border:""}},[i("template",{slot:"empty"},[i("span",[t._v("单击左侧数据库类型来查看对应的驱动版本信息")])]),t._v(" "),i("el-table-column",{attrs:{property:"driverVersion",label:"驱动版本号","min-width":"15%"}}),t._v(" "),i("el-table-column",{attrs:{property:"driverClass",label:"驱动类名","min-width":"20%"}}),t._v(" "),i("el-table-column",{attrs:{property:"jarFiles",formatter:t.formatJarFileList,label:"驱动JAR名称","min-width":"30%"}}),t._v(" "),i("el-table-column",{attrs:{property:"driverPath",label:"驱动版本路径","min-width":"50%"}})],2)],1)],1)]),t._v(" "),i("el-dialog",{attrs:{title:"添加说明",visible:t.dialogVisible,width:"40%","before-close":t.handleClose},on:{"update:visible":function(e){t.dialogVisible=e}}},[i("span",[t._v("请按照驱动路径所在的目录${DBSWITCH_HOME}/drivers下，在数据库类型为名称的目录下，以驱动版本号为名称创建目录并放置对应的驱动jar文件，然后重启即可生效。具体可参考https://gitee.com/inrgihc/dbswitch/tree/master/drivers下的目录结构。")]),t._v(" "),i("span"),t._v(" "),i("span",[t._v("特殊说明：驱动版本目录下的所有JAR必须无任何外部依赖，否则，也需将其依赖JAR一起放置到对应的目录下。")]),t._v(" "),i("span",{staticClass:"dialog-footer",attrs:{slot:"footer"},slot:"footer"},[i("el-button",{on:{click:function(e){t.dialogVisible=!1}}},[t._v("取 消")]),t._v(" "),i("el-button",{attrs:{type:"primary"},on:{click:function(e){t.dialogVisible=!1}}},[t._v("确 定")])],1)])],1)},staticRenderFns:[]};var s=i("VU/8")(a,n,!1,function(t){i("djDS")},"data-v-400971a6",null);e.default=s.exports},djDS:function(t,e){}});
-//# sourceMappingURL=19.b1e6da86c8a7dcf8425b.js.map

dbswitch-admin/src/main/resources/static/js/19.dd345b856062984bc737.js

@@ -0,0 +1,2 @@
+webpackJsonp([19],{TT6I:function(t,e){},WfA7:function(t,e,i){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var a={data:function(){return{dialogVisible:!1,loading:!0,connectionTypes:[],versionDrivers:[],isActive:-1}},methods:{loadConnectionTypes:function(){var t=this;this.$http({method:"GET",url:"/dbswitch/admin/api/v1/connection/types"}).then(function(e){0===e.data.code?(t.connectionTypes=e.data.data,t.handleChooseClick("MYSQL",0)):e.data.message&&alert("初始化数据库类型信息失败:"+e.data.message)})},handleChooseClick:function(t,e){var i=this;this.isActive=e,this.$http.get("/dbswitch/admin/api/v1/connection/"+t+"/drivers").then(function(t){0===t.data.code?i.versionDrivers=t.data.data:t.data.message&&alert("查询驱动版本信息失败,"+t.data.message)})},handleClose:function(t){this.$confirm("确认关闭？").then(function(e){t()}).catch(function(t){})},formatJarFileList:function(t,e){return t[e.property].join(";\n")}},created:function(){this.loadConnectionTypes()},beforeDestroy:function(){}},n={render:function(){var t=this,e=t.$createElement,i=t._self._c||e;return i("div",[i("el-card",[i("div",{staticClass:"container"},[i("el-card",{staticClass:"box-card"},[i("div",{staticClass:"clearfix",attrs:{slot:"header",align:"center"},slot:"header"},[i("span",[i("b",[t._v("数据库产品类型列表")])])]),t._v(" "),i("div",{staticClass:"navsBox"},[i("el-scrollbar",{staticStyle:{height:"600px"}},[i("ul",t._l(t.connectionTypes,function(e,a){return i("li",{key:a,class:{active:a==t.isActive},on:{click:function(i){return t.handleChooseClick(e.type,a)}}},[t._v("["+t._s(e.id)+"] "+t._s(e.name)+"\n              ")])}),0)])],1)]),t._v(" "),i("div",{staticClass:"contentBox"},[i("div",{staticStyle:{margin:"10px 5px"},attrs:{align:"right",width:"95%"}},[i("el-button",{attrs:{type:"primary",size:"mini",icon:"el-icon-document-add"},on:{click:function(e){t.dialogVisible=!0}}},[t._v("添加\n          ")])],1),t._v(" "),i("el-table",{attrs:{"header-cell-style":{background:"#eef1f6",color:"#606266"},data:t.versionDrivers,size:"small",stripe:"",border:""}},[i("template",{slot:"empty"},[i("span",[t._v("单击左侧数据库类型来查看对应的驱动版本信息")])]),t._v(" "),i("el-table-column",{attrs:{property:"driverVersion",label:"驱动版本号","min-width":"30%"}}),t._v(" "),i("el-table-column",{attrs:{property:"driverClass",label:"驱动类名","min-width":"30%"}}),t._v(" "),i("el-table-column",{attrs:{property:"jarFiles",formatter:t.formatJarFileList,label:"驱动JAR名称","min-width":"40%"}})],2)],1)],1)]),t._v(" "),i("el-dialog",{attrs:{title:"添加说明",visible:t.dialogVisible,width:"40%","before-close":t.handleClose},on:{"update:visible":function(e){t.dialogVisible=e}}},[i("span",[t._v("请按照驱动路径所在的目录${DBSWITCH_HOME}/drivers下，在数据库类型为名称的目录下，以驱动版本号为名称创建目录并放置对应的驱动jar文件，然后重启即可生效。具体可参考https://gitee.com/inrgihc/dbswitch/tree/master/drivers下的目录结构。")]),t._v(" "),i("span"),t._v(" "),i("span",[t._v("特殊说明：驱动版本目录下的所有JAR必须无任何外部依赖，否则，也需将其依赖JAR一起放置到对应的目录下。")]),t._v(" "),i("span",{staticClass:"dialog-footer",attrs:{slot:"footer"},slot:"footer"},[i("el-button",{on:{click:function(e){t.dialogVisible=!1}}},[t._v("取 消")]),t._v(" "),i("el-button",{attrs:{type:"primary"},on:{click:function(e){t.dialogVisible=!1}}},[t._v("确 定")])],1)])],1)},staticRenderFns:[]};var s=i("VU/8")(a,n,!1,function(t){i("TT6I")},"data-v-34e9157e",null);e.default=s.exports}});
+//# sourceMappingURL=19.dd345b856062984bc737.js.map

dbswitch-admin/src/main/resources/static/js/manifest.abc11e34d797dee7d4d2.js

@@ -1,2 +1,2 @@
-!function(e){var c=window.webpackJsonp;window.webpackJsonp=function(n,f,a){for(var o,d,i,u=0,b=[];u<n.length;u++)d=n[u],r[d]&&b.push(r[d][0]),r[d]=0;for(o in f)Object.prototype.hasOwnProperty.call(f,o)&&(e[o]=f[o]);for(c&&c(n,f,a);b.length;)b.shift()();if(a)for(u=0;u<a.length;u++)i=t(t.s=a[u]);return i};var n={},r={25:0};function t(c){if(n[c])return n[c].exports;var r=n[c]={i:c,l:!1,exports:{}};return e[c].call(r.exports,r,r.exports,t),r.l=!0,r.exports}t.e=function(e){var c=r[e];if(0===c)return new Promise(function(e){e()});if(c)return c[2];var n=new Promise(function(n,t){c=r[e]=[n,t]});c[2]=n;var f=document.getElementsByTagName("head")[0],a=document.createElement("script");a.type="text/javascript",a.charset="utf-8",a.async=!0,a.timeout=12e4,t.nc&&a.setAttribute("nonce",t.nc),a.src=t.p+"static/js/"+e+"."+{0:"9f5c7dfe2e2d505911a3",1:"fed755dff73c923d7f16",2:"22e821ec8c9909429f09",3:"ef5e983cf9ad9dc27899",4:"f7c0ea89f712c0335ac9",5:"de32c8bd9fcd7cba61b2",6:"d7f3aa182a9403e7c6f6",7:"2c3ef6028bafee6fbaca",8:"535ff4d6dbb1131433ea",9:"4590fe5acd44e077ba19",10:"1d1a99a89d92bca35121",11:"f1220d9f411fa31f402d",12:"f04608dc3d77cd7fb925",13:"522b8e9b509523953170",14:"5d055f12c2b831e53cd6",15:"9742967c21d37f7c493f",16:"3d8d1b4a2cf253b6dcec",17:"68d3bb07f9efaf16b653",18:"b6bf70f4f372e952d31f",19:"b1e6da86c8a7dcf8425b",20:"beeb2cdb187564a0c9fe",21:"5bf6235c9914a933db4d",22:"c4c6da570159683c5736"}[e]+".js";var o=setTimeout(d,12e4);function d(){a.onerror=a.onload=null,clearTimeout(o);var c=r[e];0!==c&&(c&&c[1](new Error("Loading chunk "+e+" failed.")),r[e]=void 0)}return a.onerror=a.onload=d,f.appendChild(a),n},t.m=e,t.c=n,t.d=function(e,c,n){t.o(e,c)||Object.defineProperty(e,c,{configurable:!1,enumerable:!0,get:n})},t.n=function(e){var c=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(c,"a",c),c},t.o=function(e,c){return Object.prototype.hasOwnProperty.call(e,c)},t.p="/",t.oe=function(e){throw console.error(e),e}}([]);
+!function(e){var c=window.webpackJsonp;window.webpackJsonp=function(n,f,o){for(var a,d,b,i=0,u=[];i<n.length;i++)d=n[i],r[d]&&u.push(r[d][0]),r[d]=0;for(a in f)Object.prototype.hasOwnProperty.call(f,a)&&(e[a]=f[a]);for(c&&c(n,f,o);u.length;)u.shift()();if(o)for(i=0;i<o.length;i++)b=t(t.s=o[i]);return b};var n={},r={25:0};function t(c){if(n[c])return n[c].exports;var r=n[c]={i:c,l:!1,exports:{}};return e[c].call(r.exports,r,r.exports,t),r.l=!0,r.exports}t.e=function(e){var c=r[e];if(0===c)return new Promise(function(e){e()});if(c)return c[2];var n=new Promise(function(n,t){c=r[e]=[n,t]});c[2]=n;var f=document.getElementsByTagName("head")[0],o=document.createElement("script");o.type="text/javascript",o.charset="utf-8",o.async=!0,o.timeout=12e4,t.nc&&o.setAttribute("nonce",t.nc),o.src=t.p+"static/js/"+e+"."+{0:"9f5c7dfe2e2d505911a3",1:"fed755dff73c923d7f16",2:"22e821ec8c9909429f09",3:"ef5e983cf9ad9dc27899",4:"483abcc3a4b8f904c65d",5:"de32c8bd9fcd7cba61b2",6:"d7f3aa182a9403e7c6f6",7:"2c3ef6028bafee6fbaca",8:"535ff4d6dbb1131433ea",9:"4590fe5acd44e077ba19",10:"1d1a99a89d92bca35121",11:"f1220d9f411fa31f402d",12:"f04608dc3d77cd7fb925",13:"522b8e9b509523953170",14:"5d055f12c2b831e53cd6",15:"9742967c21d37f7c493f",16:"3d8d1b4a2cf253b6dcec",17:"68d3bb07f9efaf16b653",18:"b6bf70f4f372e952d31f",19:"dd345b856062984bc737",20:"beeb2cdb187564a0c9fe",21:"5bf6235c9914a933db4d",22:"c4c6da570159683c5736"}[e]+".js";var a=setTimeout(d,12e4);function d(){o.onerror=o.onload=null,clearTimeout(a);var c=r[e];0!==c&&(c&&c[1](new Error("Loading chunk "+e+" failed.")),r[e]=void 0)}return o.onerror=o.onload=d,f.appendChild(o),n},t.m=e,t.c=n,t.d=function(e,c,n){t.o(e,c)||Object.defineProperty(e,c,{configurable:!1,enumerable:!0,get:n})},t.n=function(e){var c=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(c,"a",c),c},t.o=function(e,c){return Object.prototype.hasOwnProperty.call(e,c)},t.p="/",t.oe=function(e){throw console.error(e),e}}([]);
-//# sourceMappingURL=manifest.125e7b77fc066142d0ea.js.map
+//# sourceMappingURL=manifest.abc11e34d797dee7d4d2.js.map

dbswitch-core/src/main/java/com/gitee/dbswitch/provider/meta/AbstractMetadataProvider.java

@@ -264,7 +264,12 @@ public abstract class AbstractMetadataProvider
   @Override
   public String getPrimaryKeyAsString(List<String> pks) {
     if (!pks.isEmpty()) {
-      return quoteName(StringUtils.join(pks, quoteName(StrPool.COMMA)));
+      return quoteName(
+          StringUtils.join(
+              pks.stream().distinct().collect(Collectors.toList())
+              , quoteName(StrPool.COMMA)
+          )
+      );
     }
     return StringUtils.EMPTY;
   }

dbswitch-product/dbswitch-product-oceanbase/src/main/java/com/gitee/dbswitch/product/oceanbase/OceanbaseMetadataQueryProvider.java

@@ -111,7 +111,7 @@ public class OceanbaseMetadataQueryProvider extends AbstractMetadataProvider {
 
   @Override
   public String getQuotedSchemaTableCombination(String schemaName, String tableName) {
-    return this.delegate.getQuotedSchemaTableCombination(schemaName, tableName);
+    return quoteSchemaTableName(schemaName, tableName);
   }
 
   @Override

dbswitch-product/dbswitch-product-oceanbase/src/main/java/com/gitee/dbswitch/product/oceanbase/OceanbaseUtils.java

@@ -34,10 +34,10 @@ public class OceanbaseUtils {
               return false;
             }
           } else {
-            throw new RuntimeException();
+            throw new RuntimeException("Execute SQL[" + sql + "] return null value");
           }
         } else {
-          throw new RuntimeException();
+          throw new RuntimeException("Execute SQL[" + sql + "] no result");
         }
       }
     } catch (SQLException sqlException) {

dbswitch-product/dbswitch-product-sqlserver/src/main/java/com/gitee/dbswitch/product/sqlserver/SqlserverMetadataQueryProvider.java

@@ -25,6 +25,7 @@ import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.stream.Collectors;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 
@@ -328,10 +329,10 @@ public class SqlserverMetadataQueryProvider extends AbstractMetadataProvider {
   @Override
   public String getPrimaryKeyAsString(List<String> pks) {
     if (null != pks && !pks.isEmpty()) {
-      return "[" + StringUtils.join(pks, "] , [") + "]";
+      return "[" + StringUtils.join(pks.stream().distinct().collect(Collectors.toList()), "] , [") + "]";
     }
 
-    return "";
+    return StringUtils.EMPTY;
   }
 
   @Override