Apache Commons-Collection Test_002

/** * Apache Commons-Collection Closure */ @Test public void test001_CollectionUtils_Closure() throws Exception { logger.debug("Test Number One Results : "); List<String> collectionOfWords = Arrays.asList( "Java", "Example", "Help", "Tips", "And", "Tricks", "Apache", "Commons", "Collections" ); // 모든 요소 출력 CollectionUtils.forAllDo(collectionOfWords, new Closure(){ public void execute(Object input) { assert input != null; logger.debug(input.toString() + " "); } }); logger.debug("Test Number Two Results : "); int i = 1; List<DTO> collectionOfDTOs = Arrays.asList( new DTO(i++, "Java Tips and Tricks", Gender.Male, State.WI), new DTO(i++, "Apache Commons", Gender.Male, State.WI), new DTO(i++, "Jakarta Commons", Gender.Male, State.WI), new DTO(i++, "Collections", Gender.Male, State.WI), new DTO(i++, "Closures", Gender.Male, State.WI) ); CollectionUtils.forAllDo(collectionOfDTOs, new Closure(){ public void execute(Object input) { DTO dto = (DTO) input; assert dto != null; String s = StringUtils.defaultIfEmpty(dto.getName(), "null"); dto.setName("Yoda says, " + s + " Rocks!"); } }); // 이것과 같은 효과 ??? 어떻게 사용해야 잘 사용했다고 할까... // for (DTO dto : collectionOfDTOs) { // if (dto != null) { // String s = StringUtils.defaultIfEmpty(dto.getName(), "null"); // dto.setName("Yoda says, " + s + " Rocks!"); // } // } logger.debug("collectionOfDTOs : " + collectionOfDTOs.toString()); }


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