Apache Commons-Collection Test

Java/자카르타

Apache Commons-Collection Test_002

우혁이 아빠 2012. 3. 27. 17:47

/**
	 * 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());
	}

http://apachecommonstipsandtricks.blogspot.com/2009/01/examples-of-functors-transformers.html -> 출처

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