消除if-else/switch语句块来聚合模型的设计与实现

  1 public enum Institution implements IInstitution, IFile {
  2  
  3     TA("交易所"){
  4         @Override
  5         public Type type() {
  6             return Type.TA;
  7         }
  8  
  9         @Override
 10         public String fileNameWithoutSeq(String filePattern, Date batchDate) {
 11             return String.format(filePattern.replace("(\\d{8})", "%1$tY%1$tm%1$td"), batchDate);
 12         }
 13  
 14         @Override
 15         public String filePattern(String fileName) {
 16             String patterns[] = fileName.split("\\d{8}",2);
 17             String filePattern = patterns[0] + "(\\d{8})" + patterns[1];
 18             patterns = filePattern.split("\\d{3}[.]", 2);
 19             return patterns[0] + "(\\d{3})." + patterns[1];
 20         }
 21  
 22         @Override
 23         public String downloadFilePath(String basePath, Date batchDate) {
 24             String date = new SimpleDateFormat("yyyyMMdd").format(batchDate);
 25             return basePath + "/" + date;
 26         }
 27  
 28         @Override
 29         public String uploadFilePath(String basePath, Date batchDate) {
 30             String date = new SimpleDateFormat("yyyyMMdd").format(batchDate);
 31             return basePath + "/" + date;
 32         }
 33  
 34         @Override
 35         public boolean multiBatch() {
 36             return true;
 37         }
 38  
 39         @Override
 40         public String fileNameWithSeq(String fileNamePatternWithDate, int seq) {
 41             if(!multiBatch())
 42                 throw new UnsupportedOperationException("该机构不支持一天多批次文件");
 43             return fileNamePatternWithDate.replace("(\\d{3})", String.format("%03d", seq));
 44         }
 45     },
 46     Com("渠道") {
 47         @Override
 48         public Type type() {
 49             return Type.Channel;
 50         }
 51  
 52         @Override
 53         public String fileNameWithoutSeq(String filePattern, Date batchDate) {
 54             String fileKeyPatternWithDate = String.format(filePattern.replace("(\\d{8})", "%1$tY%1$tm%1$td"),
 55                     batchDate);
 56             return fileKeyPatternWithDate.replace("(\\d{4})", ChannelCode.typeOf(this).getCode());
 57         }
 58  
 59         @Override
 60         public String filePattern(String fileName) {
 61             String patterns[] = fileName.split("\\d{8}", 2);
 62             String filePattern = patterns[0] + "(\\d{8})" + patterns[1];
 63             patterns = filePattern.split("\\d{4}", 2);
 64             return patterns[0] + "(\\d{4})" + patterns[1];
 65         }
 66  
 67         @Override
 68         public String fileNameWithSeq(String fileNamePatternWithDate, int seq) {
 69             throw new UnsupportedOperationException("该机构不支持一天多批次文件");
 70         }
 71     };
 72  
 73     private String text;
 74     Institution(String text){
 75         this.text = text;
 76     }
 77     public String getText(){
 78         return this.text;
 79     }
 80     public String getAbbr(){
 81         return this.toString().toLowerCase();
 82     }
 83  
 84     @Override
 85     public Institution type() {
 86         return this;
 87     }
 88  
 89     @Override
 90     public InstitutionCode institutionCode() {
 91         return InstitutionCode.typeOf(this);
 92     }
 93  
 94     public static Institution codeOf(String institution){
 95         for(Institution ins : Institution.values()){
 96             if(ins.getAbbr().equals(institution.toLowerCase())){
 97                 return ins;
 98             }
 99         }
100         throw new IllegalArgumentException("不支持机构");
101     }
102  
103     @Override
104     public DateFormat fileNameDateFormat() {
105         return new SimpleDateFormat("yyyyMMdd");
106     }
107  
108     @Override
109     public boolean multiBatch() {
110         return false;
111     }
112  
113     @Override
114     public String downloadFilePath(String basePath, Date batchDate) {
115         String date = new SimpleDateFormat("yyyyMMdd").format(batchDate);
116         return basePath + "/download/" + date;
117     }
118  
119     @Override
120     public String uploadFilePath(String basePath, Date batchDate) {
121         String date = new SimpleDateFormat("yyyyMMdd").format(batchDate);
122         return basePath + "/upload/" + date;
123     }
124  
125 }