:trollface: 去掉transform

hutool-core/src/main/java/cn/hutool/core/stream/TerminableWrappedStream.java

@@ -289,18 +289,6 @@ public interface TerminableWrappedStream<T, S extends TerminableWrappedStream<T,
 
 	// region ============ to optional ============
 
-	/**
-	 * 将当前流转为另一对象。用于提供针对流本身而非流中元素的操作
-	 *
-	 * @param <R>       转换类型
-	 * @param transform 转换
-	 * @return 转换后的流
-	 */
-	default <R> Optional<R> transform(final Function<? super S, R> transform) {
-		Objects.requireNonNull(transform);
-		return Optional.ofNullable(transform.apply(wrap(this)));
-	}
-
 	/**
 	 * 获取与给定断言匹配的第一个元素
 	 *

hutool-core/src/test/java/cn/hutool/core/stream/AbstractEnhancedWrappedStreamTest.java

@@ -97,12 +97,6 @@ public class AbstractEnhancedWrappedStreamTest {
 		}, toZip);
 	}
 
-	@Test
-	public void testTransform() {
-		final List<Integer> list = wrap(1, 2, 3).transform(Wrapper::toList).orElse(null);
-		Assert.assertEquals(asList(1, 2, 3), list);
-	}
-
 	@Test
 	public void testFindFirst() {
 		final List<Integer> list = asList(1, 2, 3);
@@ -181,6 +175,7 @@ public class AbstractEnhancedWrappedStreamTest {
 		final List<Integer> list = asList(1, 2, 3);
 		final Map<Boolean, List<Integer>> map = new HashMap<Boolean, List<Integer>>() {
 			private static final long serialVersionUID = 1L;
+
 			{
 				put(Boolean.TRUE, singletonList(2));
 				put(Boolean.FALSE, asList(1, 3));
@@ -624,6 +619,7 @@ public class AbstractEnhancedWrappedStreamTest {
 	public void testToEntries() {
 		final Map<Integer, Integer> expect = new HashMap<Integer, Integer>() {
 			private static final long serialVersionUID = 1L;
+
 			{
 				put(1, 1);
 				put(2, 2);

hutool-core/src/test/java/cn/hutool/core/stream/EasyStreamTest.java

@@ -556,13 +556,4 @@ public class EasyStreamTest {
 		}
 	}
 
-	@Test
-	public void testTransform() {
-		final boolean result = EasyStream.of(1, 2, 3)
-				.transform(EasyStream::toList)
-				.map(List::isEmpty)
-				.orElse(false);
-		Assert.assertFalse(result);
-	}
-
 }