Apache Commons-Collection Test

Java/자카르타

Apache Commons-Collection Test_003

우혁이 아빠 2012. 3. 27. 17:50

@SuppressWarnings("unchecked")
	@Test
	public void test002_CollectionUtils_Transformer1() throws Exception {
		Collection<String> stringOfNumbers = Arrays.asList("1", "2", "3", "4");
		Collection<Integer> intNums	= CollectionUtils.
				collect(stringOfNumbers, new Transformer(){

public Object transform(Object input) {
				return Integer.valueOf((String) input);
			}
			
		});
		logger.debug("collectionOfDTOs : " + intNums.toString());
	}
	
	@SuppressWarnings("unchecked")
	@Test
	public void test003_CollectionUtils_Transformer2() throws Exception {
		List<OldBill> aList = Arrays.asList(
				new OldBill("A1"), new OldBill("A2"),
				new OldBill("A3"), new OldBill("A4")
		);
		logger.debug("aList : " + aList.toString());
		
		Transformer[] chainedTransformer = new Transformer[]{
				new Transformer() {
					public Object transform(Object input) {
						return ((OldBill) input).getId().replace('A', 'Z');
					}
				},
				new Transformer() {
					public Object transform(Object input) {
						char[] c = ((String) input).toCharArray();
						int x = Integer.parseInt(String.valueOf(c[1])) + 500;
						return new NewBill(String.valueOf(c[0]) + x);
					}
				}
		};
		List<NewBill> bList = (List<NewBill>) CollectionUtils.
				collect(aList, TransformerUtils.
						chainedTransformer(chainedTransformer));
		logger.debug("bList : " + bList.toString());
		
	}

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