实践中的设计模式运用
在项目中用到全文检索，大家知道全文检索是对索引的检索，由于用全文检索搜索出来的东西可能并不都是用户需要的，所以就增加了一个过滤功能，就是从全文检索搜索出来的结果集中排除不符合条件的（当然条件是多种多样的，也可能是多种组合的）。
在我们项目中条件是权限的限制，文件夹的限制，修改时间的限制以及这三种限制的各种组合。
首先看看我的一位同事的代码
private static List<String> getFilterId(Map<Integer, String> idMap,SearchBean bean ){List<String> returnlist = new ArrayList<String>();for(String id : idMap.values()){File f = null;try {f = fileManager.get(File.class, id);boolean file =StringUtils.isNotBlank(bean.getFileId());boolean updateB = StringUtils.isNotBlank(bean.getUpdateBeginDate());boolean updateE = StringUtils.isNotBlank(bean.getUpdateEndDate());boolean popedom = cacheManager.hasPopedom(null, f, new String[] { CacheManager.ReadType_Popedom }, bean.getCurUser(), FileConstants.action_preview);//只进行lucene全文检索if(!file && !updateB && !updateE){if (f != null && popedom) {returnlist.add(id);}}//lucene全文检索+文件夹限制if(file && !updateB && !updateE){boolean flag =false;String direIds = searchInDire(bean.getFileId(),bean.getIsinclude());flag = ArrayUtils.contains(direIds.split(","), f.getDirectory().getId());if(flag && f != null && popedom){returnlist.add(id);}}//lucene+更新时间if(!file && (updateB || updateE)){if(updateB && updateE){if(popedom && (DateUtil.compareDate(f.getUpdateTime(),DateUtil.convertStringToDate(bean.getUpdateBeginDate()))==1)&&(DateUtil.compareDate(DateUtil.convertStringToDate(bean.getUpdateEndDate()),f.getUpdateTime())==1) && f != null){returnlist.add(id);}}else if(updateB && !updateE){if(popedom && (DateUtil.compareDate(DateUtil.convertStringToDate(bean.getUpdateBeginDate()),f.getUpdateTime())==1) && f != null){returnlist.add(id);}}else{if(popedom && (DateUtil.compareDate(f.getUpdateTime(),DateUtil.convertStringToDate(bean.getUpdateBeginDate()))==1) && f != null){returnlist.add(id);}}}//lucene+文件夹限制+更新时间if(file && (updateB || updateE)){boolean flag =false;String direIds = searchInDire(bean.getFileId(),bean.getIsinclude());flag = ArrayUtils.contains(direIds.split(","), f.getDirectory().getId());if(file && updateB && updateE){if(flag && popedom && f != null && (DateUtil.compareDate(f.getUpdateTime(),DateUtil.convertStringToDate(bean.getUpdateBeginDate()))==1)&&(DateUtil.compareDate(DateUtil.convertStringToDate(bean.getUpdateEndDate()),f.getUpdateTime())==1)){returnlist.add(id);}}else if(file && updateB && !updateE){if(flag && popedom && f != null && (DateUtil.compareDate(DateUtil.convertStringToDate(bean.getUpdateBeginDate()),f.getUpdateTime())==1)){returnlist.add(id);}}else{if(flag && popedom && f != null && (DateUtil.compareDate(f.getUpdateTime(),DateUtil.convertStringToDate(bean.getUpdateBeginDate()))==1)){returnlist.add(id);}}}} catch (Exception e) {}}return returnlist;}
